阅读说明：本技术 一种光学模组和医疗激光装置 (Optical module and medical laser device ) 是由 蔡磊 刘兴胜 于 2020-07-31 设计创作，主要内容包括：本发明提供一种光学模组和医疗激光装置,属于光斑应用技术领域,包括沿主光轴依次设置的第一透镜、第二透镜和阵列镜,其中,第一透镜沿主光轴的第一方向整形光束,第二透镜沿主光轴的第二方向整形光束,阵列镜的阵列沿主光轴的第二方向排列,激光光束经第一透镜后入射第二透镜,第二透镜沿第二方向扩散激光光束,并将激光光束在第二方向上由高斯分布转换为平顶分布后,通过阵列镜出射；其中,第一方向和第二方向垂直。实现激光光束原始高斯分布转化成平顶分布,且光学模组体积小。(The invention provides an optical module and a medical laser device, which belong to the technical field of light spot application, and comprise a first lens, a second lens and an array mirror which are sequentially arranged along a main optical axis, wherein the first lens shapes light beams along a first direction of the main optical axis, the second lens shapes light beams along a second direction of the main optical axis, an array of the array mirror is arranged along the second direction of the main optical axis, the laser light beams enter the second lens after passing through the first lens, the second lens diffuses the laser light beams along the second direction, and the laser light beams are emitted through the array mirror after being converted from Gaussian distribution to flat-top distribution in the second direction; wherein the first direction and the second direction are perpendicular. The original Gaussian distribution of the laser beam is converted into flat-top distribution, and the optical module is small in size.)

1. An optical module is characterized by comprising a first lens, a second lens and an array mirror which are sequentially arranged along a main optical axis, wherein the first lens shapes a light beam along a first direction of the main optical axis, the second lens shapes the light beam along a second direction of the main optical axis, an array of the array mirror is arranged along the second direction of the main optical axis, a laser beam enters the second lens after passing through the first lens, the second lens diffuses the laser beam along the second direction, converts a Gaussian distribution of the laser beam into a flat-top distribution in the second direction, and then emits the laser beam through the array mirror; wherein the first direction and the second direction are perpendicular.

2. The optical module of claim 1 wherein the first lens is an ellipsoidal mirror and the second lens is a hyperbolic mirror.

3. The optical module of claim 1 further comprising a third lens positioned between the second lens and the array mirror, wherein the third lens shapes the beam in the second direction of the primary optical axis.

4. The optical module of claim 1, wherein the array mirror comprises a plurality of first cambered or serrated surfaces continuously formed along the second direction, and the first cambered or serrated surfaces are located on an incident surface or an exit surface of the array mirror.

5. The optical module according to claim 4, wherein the incident surface of the array mirror is a plane, a convex surface or a concave surface, and the exit surface of the array mirror is a plurality of the first cambered surfaces or the sawtooth surfaces; or the incident surface of the array mirror is a plurality of first cambered surfaces or sawtooth surfaces, and the emergent surface of the array mirror is a plane, a convex surface or a concave surface.

6. The optical module of claim 4, wherein the array mirror further comprises a plurality of second curved surfaces or the serrated surfaces arranged along the first direction, and the second curved surfaces or the serrated surfaces are located on an incident surface or an exit surface of the array mirror.

7. The optical module according to claim 6, wherein the incident surface or the exit surface of the array mirror includes a plurality of first curved surfaces formed continuously along the second direction, and the incident surface or the exit surface of the array mirror further includes a plurality of second curved surfaces arranged continuously along the first direction on the basis of the plurality of first curved surfaces;

or the incident surface of the array mirror is a sawtooth surface arranged along the first direction, and the emergent surface of the array mirror is a plurality of first cambered surfaces arranged along the second direction;

or the incident surface of the array mirror is a plurality of first cambered surfaces arranged along the second direction, and the emergent surface of the array mirror is a sawtooth surface arranged along the first direction;

or the incident surface of the array mirror is a sawtooth surface, and the emergent surface of the array mirror is a sawtooth surface.

8. The optical module of claim 6, wherein the array mirror comprises a first array mirror and a second array mirror, and the first cambered surface or the sawtooth surface is located on the incident surface or the exit surface of the first array mirror and/or the incident surface or the exit surface of the second array mirror.

9. The optical module of claim 1, wherein the array mirror is an array mirror, and a plurality of first curved surfaces or saw teeth arranged along the second direction are continuously formed on a reflecting surface of the array mirror.

10. The optical module according to any one of claims 4-9, wherein the array mirror is reciprocally movable along the saw tooth arrangement direction or rotatable along the main optical axis direction.

11. The optical module of any of claims 4-9 wherein the tooth surfaces of the serrations have curvature.

12. The optical module of claim 1, wherein the first lens is movable along a direction of a main optical axis to vary a light exit range of the exit surface of the array mirror.

13. The optical module of claim 3, wherein a mirror is further disposed between the second lens and the third lens.

14. The optical module of claim 13, wherein the mirror is rotatable along a primary optical axis, and wherein the mirror has an angle of rotation of 0 ° to 90 ° to scan the spot of light within the angle of rotation.

15. A medical laser device comprising a housing containing a laser and an optical module according to any of claims 1-12 disposed in an exit direction of the laser.

16. The medical laser device of claim 15, wherein the housing includes a handle and a barrel, the laser being disposed within the handle, the optical module being disposed within the barrel, the barrel and the handle being removably coupled; the lens cone comprises a replaceable head, the array mirror is located in the replaceable head, and the replaceable head is detachably connected with the lens cone.

17. The medical laser device of claim 15, further comprising a first motor and/or a second motor, the first motor and the second motor being coupled to the first lens and the array mirror, respectively.

Technical Field

The invention relates to the technical field of light spot application, in particular to an optical module and a medical laser device.

Background

In the application of laser spots, the original gaussian distribution emitted by a semiconductor laser needs to be converted into a flat-top distribution, and a currently common method is to use a plurality of lens assemblies, so that the overall volume of the system is large. In addition, in order to obtain a large area of dot/line light spots, the existing dot matrix technology needs to use a single-point scanning mode, and the efficiency is low.

Although the array mirror has the effect of cutting the optical into dots/lines, in the application of laser therapy, the direct laser distribution is gaussian distribution, and the axial size is small, so that the direct laser distribution cannot be directly converted by the lens array.

Disclosure of Invention

The invention aims to provide an optical module and a medical laser device, which can realize the conversion of original Gaussian distribution of laser beams into flat-top distribution and have small volume.

The embodiment of the invention is realized by the following steps:

one aspect of the embodiments of the present invention provides an optical module, which includes a first lens, a second lens, and an array mirror, which are sequentially disposed along a main optical axis, wherein the first lens shapes a light beam along a first direction of the main optical axis, the second lens shapes a light beam along a second direction of the main optical axis, an array of the array mirror is arranged along the second direction of the main optical axis, a laser beam enters the second lens after passing through the first lens, the second lens diffuses the laser beam along the second direction, and the laser beam is emitted through the array mirror after being converted from gaussian distribution to flat-top distribution in the second direction; wherein the first direction and the second direction are perpendicular.

Optionally, the first lens is an ellipsoidal mirror, and the second lens is a hyperboloid mirror.

Optionally, a third lens is further included between the second lens and the array mirror, wherein the third lens shapes the beam in a second direction of the primary optical axis.

Optionally, the array mirror includes a plurality of first arc surfaces or sawtooth surfaces continuously formed along the second direction, and the first arc surfaces or the sawtooth surfaces are located on an incident surface or an exit surface of the array mirror.

Optionally, the incident surface of the array mirror is a plane, a convex surface or a concave surface, and the exit surface of the array mirror is a plurality of first arc surfaces or sawtooth surfaces; or the incident surface of the array mirror is a plurality of first cambered surfaces or sawtooth surfaces, and the emergent surface of the array mirror is a plane, a convex surface or a concave surface.

Optionally, the array mirror further includes a plurality of second arc surfaces or sawtooth surfaces arranged along the first direction, and the second arc surfaces or the sawtooth surfaces are located on an incident surface or an exit surface of the array mirror.

Optionally, the incident surface or the exit surface of the array mirror includes a plurality of first arc surfaces continuously formed along the second direction, and the incident surface or the exit surface of the array mirror further includes a plurality of second arc surfaces continuously arranged along the first direction on the basis of the plurality of first arc surfaces; or the incident surface of the array mirror is a sawtooth surface arranged along the first direction, and the emergent surface of the array mirror is a plurality of first cambered surfaces arranged along the second direction; or the incident surface of the array mirror is a plurality of first cambered surfaces arranged along the second direction, and the emergent surface of the array mirror is a sawtooth surface arranged along the first direction; or the incident surface of the array mirror is a sawtooth surface, and the emergent surface of the array mirror is a sawtooth surface.

Optionally, the array mirror includes a first array mirror and a second array mirror, and the first arc surface or the sawtooth surface is located on an incident surface or an exit surface of the first array mirror, and/or an incident surface or an exit surface of the second array mirror.

Optionally, the array mirror is an array mirror, and a plurality of first arc surfaces or saw teeth arranged along the second direction are continuously formed on a reflecting surface of the array mirror.

Optionally, the array mirror is capable of reciprocating along the direction of the saw tooth arrangement, or rotating along the direction of the main optical axis.

Optionally, the tooth surface of the sawtooth has a curvature.

Optionally, the first lens is movable along a main optical axis direction to change a light-emitting range of the array mirror exit surface.

Optionally, a reflector is further disposed between the second lens and the third lens.

Optionally, the reflector is rotatable along a main optical axis, and a rotation angle of the reflector is 0 ° to 90 ° so as to scan the light spot within the rotation angle.

Another aspect of the embodiments of the present invention provides a medical laser device, which includes a housing, and the housing is provided with a laser and the above optical module disposed in the emitting direction of the laser.

Optionally, the housing includes a handle and a lens barrel, the laser is disposed in the handle, the optical module is disposed in the lens barrel, and the lens barrel is detachably connected to the handle; the lens cone comprises a replaceable head, the array mirror is located in the replaceable head, and the replaceable head is detachably connected with the lens cone.

Optionally, the display device further comprises a first motor and/or a second motor, and the first motor and the second motor are respectively connected to the first lens and the array mirror.

The embodiment of the invention has the beneficial effects that:

the optical module provided by the embodiment of the invention comprises a first lens, a second lens and an array mirror which are sequentially arranged along a main optical axis, wherein the first lens compresses, converges and collimates light beams emitted by a light source, laser light beams emitted by the light source are converted from Gaussian light to flat-top light through the second lens, the emitting surface of the array mirror is used for emitting light and cutting light spots, the first lens shapes the light beams along the first direction of the main optical axis, the second lens shapes the light beams along the second direction of the main optical axis, the array of the array mirror is arranged along the second direction of the main optical axis, the first lens, the second lens and the array mirror are arranged in a matching way, so that the laser light beams enter the second lens after passing through the first lens, the second lens expands the laser light beams, the Gaussian distribution of the laser light beams is converted into the flat-top distribution and then is emitted through the array mirror, and the original Gaussian distribution of the laser beams can be converted into the flat-top distribution by arranging three, the optical module is small in size.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a slow axis structure of an optical module according to an embodiment of the present invention;

FIG. 2 is a slow-axis optical diagram of an optical module according to an embodiment of the present invention;

FIG. 3 is a schematic view of a fast axis structure of an optical module according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating a slow-axis output light spot shape of an optical module according to an embodiment of the present invention;

FIG. 5 is a second schematic diagram of a slow axis structure of an optical module according to an embodiment of the present invention;

FIG. 6 is a second diagram of the shape of the optical spot output from the slow axis of the optical module according to the embodiment of the present invention;

FIG. 7 is a third diagram of the shape of the optical spot output by the optical module in the slow axis according to the embodiment of the present invention;

FIG. 8 is a third schematic view of a slow axis structure of an optical module according to an embodiment of the present invention;

FIG. 9 is a second optical diagram of the slow axis of the optical module according to the embodiment of the present invention;

FIG. 10 is a diagram illustrating a slow-axis output light spot shape of an optical module according to an embodiment of the present invention;

FIG. 11 is a fifth diagram illustrating the shape of a slow-axis output optical spot of the optical module according to the embodiment of the present invention;

FIG. 12 is a sixth diagram illustrating the shape of a slow-axis output optical spot of the optical module according to the present invention;

FIG. 13 is a seventh view of a slow axis output spot shape of an optical module according to an embodiment of the present invention;

FIG. 14 is a schematic diagram of an array mirror structure of an optical module according to an embodiment of the present invention;

FIG. 15 is an optical diagram of an array mirror of an optical module according to an embodiment of the present invention;

FIG. 16 is a fourth schematic view of a slow axis structure of an optical module according to an embodiment of the present invention;

FIG. 17 is a fifth exemplary illustration of a slow axis structure of an optical module according to an embodiment of the present invention;

FIG. 18 is a second schematic view of a fast axis structure of an optical module according to an embodiment of the present invention;

FIG. 19 is a sixth schematic view of a slow axis structure of an optical module according to an embodiment of the present invention;

FIG. 20 is a schematic structural diagram of a medical laser device according to an embodiment of the present invention;

fig. 21 is a second schematic structural view of a medical laser device according to an embodiment of the present invention;

fig. 22 is a slow-axis defocused optical path diagram of the optical module according to the embodiment of the present invention.

Icon: 100-a first lens; 201-a second lens; 202-a third lens; 300-an array mirror; 400-a mirror; 501-laser; 502-heat sink; 503-a handle; 504-spacer particles; 505A-a first electric machine; 505B-a second electric machine; 505C-a third electric machine; 506-a lens barrel; 5061-replaceable head.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Referring to fig. 1, the present embodiment provides an optical module, which includes a first lens 100, a second lens 201, a third lens 202 and an array mirror 300 sequentially disposed along a main optical axis, wherein the first lens 100 shapes a light beam along a first direction of the main optical axis, the second lens 201 shapes a light beam along a second direction of the main optical axis, the third lens 202 shapes a light beam along the second direction of the main optical axis, and an array of the array mirror 300 is arranged along the second direction of the main optical axis. The laser beam enters the second lens 201 after passing through the first lens 100, and the second lens 201 diffuses the laser beam, converts the gaussian distribution of the laser beam into a flat-top distribution, and then emits the flat-top distribution through the array mirror 300.

The laser emitted from the light source sequentially passes through the first lens 100, the second lens 201, the third lens 202 and the array mirror 300, and the light source, the first lens 100, the second lens 201, the third lens 202 and the array mirror 300 are all on the main optical axis.

When the light source is a laser light source, if the first direction is a fast axis, the first lens 100 may be a fast axis cylindrical lens, the second lens 201 may be a slow axis cylindrical lens, and the third lens 202 may be a slow axis cylindrical lens, and the array direction of the array mirror 300 is arranged along the slow axis direction.

When the first direction is a slow axis, the first lens 100 is a slow axis cylindrical lens, the second lens 201 is a fast axis cylindrical lens, the third lens 202 is a fast axis cylindrical lens, and the array direction of the array mirror 300 is arranged along the fast axis direction.

Further, the first lens 100 is an ellipsoidal mirror, that is, when the first lens 100 is a fast-axis cylindrical lens, it can be a fast-axis ellipsoidal mirror, and when the first lens 100 is a slow-axis cylindrical lens, it can be a slow-axis ellipsoidal mirror.

The second lens 201 is a hyperboloid lens, and the incident surface of the second lens is a hyperboloid, so that the single lens not only realizes the beam expansion of the light number, but also realizes the conversion from the Gaussian light to the flat-top light, and the optical structure is simplified.

The array of array mirrors 300 is arranged along a second direction of the main optical axis, that is, when the second lens 201 is a slow-axis cylindrical lens, the array direction of the array mirrors 300 is arranged along the slow-axis direction; when the second lens 201 is a fast-axis cylindrical lens, the array direction of the array mirror 300 is arranged along the fast axis direction.

As shown in fig. 1, in the present embodiment, the first lens 100 is a fast-axis cylindrical lens, the second lens 201 is a slow-axis hyperboloid lens, the third lens 202 is a slow-axis cylindrical lens, an exit surface of the first lens 100 is a convex surface, an incident surface of the second lens 201 is a hyperboloid surface, and an exit surface of the third lens 202 is a convex surface, and a light path diagram of the present embodiment is shown in fig. 2.

When the fast axis and the slow axis are interchanged, that is, the first lens 100 is a slow axis cylindrical lens, the second lens 201 is a fast axis hyperboloid lens, and the third lens 202 is a fast axis cylindrical lens, the optical path diagram is shown in fig. 3.

The first lens 100 is used for compressing, converging and collimating light beams emitted by a light source, the laser light beams emitted by the light source are expanded in a single direction along a fast axis or a slow axis through the second lens 201 and conversion from Gaussian light to flat-top light is realized, the third lens 202 is used for correcting edge light beams while collimating the light beams, the emergent surface of the array mirror 300 is used for emitting light and cutting light spots, and the light beams emitted by the first lens 100, the second lens 201 and the third lens 202 in sequence are cut into spot combinations of points and/or lines on the slow axis so as to form the light spots in the light emitting direction.

The optical module provided by this embodiment, the first lens 100, the second lens 201, and the array mirror 300 are sequentially disposed along a primary optical axis, the first lens 100 compresses, converges, and collimates a light beam emitted from a light source, a laser beam emitted from the light source is converted from gaussian light to flat-top light by the second lens 201, an emitting surface of the array mirror 300 is used for emitting light and cutting a light spot, the first lens 100 shapes the light beam along a first direction of the primary optical axis, the second lens 201 shapes the light beam along a second direction of the primary optical axis, an array of the array mirror 300 is arranged along the second direction of the primary optical axis, the first lens 100, the second lens 201, and the array mirror 300 are configured in a matching manner, so that the laser beam enters the second lens 201 after passing through the first lens 100, the second lens 201 expands the laser beam, and the gaussian distribution of the laser beam is converted into flat-top distribution, and then is emitted through the array mirror 300. By arranging the three optical elements, the original Gaussian distribution of the laser beam can be converted into flat-top distribution, so that the optical module is small in size.

The optical module provided by the embodiment can also emit light spots of different shapes.

When the existing optical module forms a light spot, one optical module can only output the light spot in a single form, for example, the output light spot can only be one of a single-point light spot, a row of point light spots, a matrix point light spot, a linear light spot, a surface light spot and a strip light spot. The optical module outputting the single light spot is only suitable for the requirement of one industry, if a new requirement occurs, a new optical system is needed to adapt to the new requirement, but the single light spot output by the existing optical module can only correspond to the new requirement to meet the use, and when the optical module is applied in a cross-row mode, the original optical module cannot be suitable for the requirement of the new industry so as to fail; if the optical module is applied in a cross-row mode, a new optical module needs to be designed, compared with the original optical module, the change of each optical element is large, the integral structure of the original optical module is changed, the implementation cost is high, and the optical module can only be applied to the industry after being improved. Therefore, the optical module has poor applicability, the improvement cost is high, light spots cannot be mutually converted, and once a new demand appears, the original optical module fails and has poor applicability; in addition, in the scanning process of the light spot, the light spot cannot be converted, and the scanning form is single.

On the basis, the optical module provided by the invention can form light spots with variable shapes such as row points, lattice points, lines, planes and strips by slightly adjusting the optical elements in the optical module, has diversified light spot forms and can mutually complete conversion, has strong applicability, can be used for cross-row output, adapts to different requirements, has strong functions, high flexibility, low cost, small size and simple structure, and can be applied to the fields of medical cosmetology (skin tendering, depilation and fat dissolving), lattice point output, 3D identification, active scanning sources, laser printing and the like.

When the light outgoing range of the outgoing surface of the array mirror 300 is changed, the light spots formed by outgoing have various changes so as to emit light spots of different shapes.

Through the light-emitting scope that changes array mirror 300 exit surface, can the facula of different shapes of outgoing, make an optical module realize the purpose that the facula changed, when practical application like this, this optical module can stride the line and use, and the suitability is high, can be applied to different occasions with an optical module, satisfies different needs.

Specifically, spot conversion is achieved by the following embodiments.

The array mirror 300 includes a plurality of first curved surfaces or serrated surfaces continuously formed in the second direction, and the first curved surfaces or serrated surfaces are located on an incident surface or an exit surface of the array mirror 300.

The array mirror 300 further includes a plurality of second curved surfaces or serrated surfaces arranged along the first direction, and the second curved surfaces or serrated surfaces are located on the incident surface or the exit surface of the array mirror.

Illustratively, as shown in fig. 1, the exit surface of the array mirror 300 includes a plurality of first curved surfaces continuously formed along the second direction, and the first curved surfaces are convex toward the exit direction, so that the exit surface of the array mirror 300 forms a plurality of connected stripe patterns to emit stripe-shaped light spots.

As shown in fig. 1 and fig. 2, the second lens 201 is a slow axis cylindrical lens, and the first direction is a slow axis direction, that is, a plurality of first arc surfaces continuously formed along the slow axis direction on the emergent surface of the array mirror 300, so as to emit the stripe-shaped light spot shown in fig. 4.

The incident surface of the array mirror 300 is a plane, a convex surface or a concave surface, and the emergent surface of the array mirror 300 is a plurality of first cambered surfaces or sawtooth surfaces; or, the incident surface of the array mirror 300 is a plurality of first arc surfaces or sawtooth surfaces, and the exit surface of the array mirror 300 is a plane, a convex surface or a concave surface.

For example, the incident surface of the array mirror 300 may be a plane as shown in fig. 1 and 5, and the incident surface of the array mirror 300 may also be a sawtooth surface as shown in fig. 14, as shown in fig. 16, the incident surface is a sawtooth surface, the sawteeth of the incident surface are arranged along the second direction, and the light beam emitted from the exit surface of the third lens 202 is cut into a two-dimensional lattice as shown in fig. 15, so as to form a lattice spot distribution in an angular space. The third lens 202 can be integrated with the array mirror 300, that is, when the incident surface of the array mirror 300 shown in fig. 19 is convex, it can be seen that the third lens 202 can be integrated with the array mirror 300, which can achieve the same emergent effect, but reduces the optical elements of the optical module, so that the structure of the optical module is simpler.

The incident surface or the exit surface of the array mirror 300 includes a plurality of first arc surfaces continuously formed along the second direction, and the incident surface or the exit surface of the array mirror 300 further includes a plurality of second arc surfaces continuously arranged along the first direction on the basis of the plurality of first arc surfaces.

Illustratively, as shown in fig. 5, the exit surface of the array mirror 300 includes a plurality of first arc surfaces continuously formed along the second direction, and the exit surface of the array mirror 300 further includes a plurality of second arc surfaces continuously arranged along the first direction on the basis of the plurality of first arc surfaces, so that the exit surface of the array mirror 300 forms a plurality of grids which are perpendicular to each other, wherein the exit surfaces of the grids are further convex towards the light exit direction, and thus, the exit surface of the array mirror 300 forms a convex part of an array to emit row spots or array spots.

The first cambered surface and the second cambered surface form a grid-shaped emergent surface in a crossed mode, each grid can correspondingly emit a point light spot, and the whole optical module emits array point light spots.

When the emergent surface forms a second cambered surface on the basis of forming the first cambered surface, the emergent light spots shown in fig. 6 can be changed into single-row point light spots from the original strip-shaped light spots.

The incident surface type and the exit surface type of the array mirror 300 can be interchanged, such as the exit surface shown in fig. 5 is arranged in a grid, or can be arranged on the incident surface, as shown in fig. 17, the incident surface of the array mirror 300 includes a plurality of first arc surfaces continuously formed along the second direction, the first arc surfaces are convex towards the light source direction, the exit surface of the array mirror 300 is a sawtooth surface, and the sawteeth of the sawtooth surface are arranged along the first direction.

It is also possible that the incident surface of the array mirror 300 is a sawtooth surface disposed along the first direction, and the exit surface of the array mirror 300 is a plurality of first arc surfaces disposed along the second direction.

Alternatively, as shown in fig. 16, the incident surface of the array mirror 300 may be a sawtooth surface, and the exit surface of the array mirror 300 may be a sawtooth surface. In this case, the serrated surfaces may be arranged in the first direction or in the second direction.

By interchanging the incident and exit faces of the array mirror 300 to form a transformed spot.

The array mirror 300 may also be an array mirror having a plurality of first curved surfaces or serrations continuously formed on a reflective surface thereof in the second direction. The serrations are aligned in a second direction.

Further, the array mirror 300 is movable back and forth in the zigzag arrangement direction, or is rotated in the main optical axis direction. As shown in fig. 18, in the fast axis direction, that is, the first lens 100 is a slow axis cylindrical lens, the second lens 201 is a fast axis cylindrical lens, the third lens 202 is a fast axis cylindrical lens, the array direction (i.e., the array direction of the sawteeth) of the array mirror 300 is arranged along the fast axis direction, and the array mirror 300 can reciprocate along the sawteeth arrangement direction to change the light emitting range of the array mirror 300, so as to form a changed light spot.

It is also possible that the array mirror 300 may be separated into two lens arrays, each having a plurality of first curved surfaces and serrated surfaces that are perpendicular to each other and continuously formed in the first direction. That is, the array mirror 300 includes a first array mirror and a second array mirror, and the first curved surface or the serrated surface is located at an incident surface or an exit surface of the first array mirror, and/or an incident surface or an exit surface of the second array mirror.

That is to say, the first arc surface or the sawtooth surface is located on the incident surface of the first array mirror, or the first arc surface or the sawtooth surface is located on the exit surface of the first array mirror, or the first arc surface or the sawtooth surface is located on the incident surface of the second array mirror, or the first arc surface or the sawtooth surface is located on the exit surface of the second array mirror, or the incident surface and the exit surface of the first array mirror, and the incident surface and the exit surface of the second array mirror may be any one of the first arc surface or the sawtooth surface, and the first arc surface and the sawtooth surface may be randomly combined and arranged on the incident surface or the exit surface of the two array mirrors.

For example, as shown in fig. 17, the incident surface of the first array mirror includes a plurality of first arc surfaces continuously formed along the second direction, the first arc surfaces are convex toward the light source direction, the exit surface of the second array mirror is a sawtooth surface, and a sawtooth arrangement direction of the sawtooth surface is perpendicular to the second direction.

Wherein, illustratively, as shown in fig. 18, the tooth surface of the serration has a curvature.

The first lens 100 is movable along the direction of the main optical axis to change the light-emitting range of the exit surface of the array mirror 300, and when the light-emitting ranges of the exit surfaces of the array mirror 300 are different, the formed light spots are different in shape.

By moving the first lens 100 along the main optical axis, the distance between the first lens 100 and the light source is changed, and the distance between the first lens 100 and the second lens 201 is also changed, so that the light beam emitted from the light source passes through the first lens 100, the light emitting range of the light beam is changed, and different light spots can be formed through the emitting surface of the array mirror 300.

For example, the optical module shown in fig. 2 can emit the strip-shaped light spot shown in fig. 4, when the distance between the first lens 100 and the light source is decreased, that is, the distance between the first lens 100 and the second lens 201 is increased, the light source passes through the first lens 100, the light emitting range of the light is increased, the area of the thin strip-shaped light spot originally formed by the emitting surface of the array mirror 300 is increased, and the area can be gradually changed into a rectangular light spot or even a square light spot.

As shown in fig. 6, the distance between the first lens 100 and the light source gradually increases, the light emitting range gradually decreases, and the originally formed strip-shaped light spot may become a line point light spot.

As shown in fig. 7, as the distance between the first lens 100 and the light source gradually decreases, the light emitting range gradually increases, and the originally emitted single row of spot spots gradually changes into multiple rows of spot spots, i.e., array spots.

The smaller the distance between the first lens 100 and the light source is, the larger the light emitting range of the light source passing through the first lens 100 is, and the larger the formed light spot range is.

A reflecting mirror 400 is further disposed between the second lens 201 and the array mirror 300, as shown in fig. 8 and 9, when the third lens 202 is disposed, the reflecting mirror 400 is located between the second lens 201 and the third lens 202, and the reflecting mirror 400 can change the light emitting direction of the light.

When the reflector 400 is not rotated, the light emitting direction of the light can be changed by the reflector 400, and the formed light spot is not changed.

The reflector 400 is rotatable along the main optical axis to scan the light spot, so as to change the light-emitting range of the exit surface of the array mirror 300, and the light spot has different variations. And the rotation angle of the reflecting mirror 400 is 0 to 90 deg. to continuously rotate to scan the light spots within the rotation angle.

For example, when the reflector 400 does not rotate, a strip-shaped light spot or a spot light spot as shown in fig. 6 can be formed, the strip-shaped light spot can be formed by a plurality of first arc surfaces of the exit surface of the array mirror 300, and the spot light spot can be formed by a plurality of second arc surfaces of the exit surface of the array mirror 300 on the basis of the plurality of first arc surfaces. At this time, the mirror 400 changes only the light outgoing direction of the light, changes the position where the light spot is formed, and does not change the shape of the light spot formed.

When the rotating mirror 400 scans, the mirror 400 can rotate along the main optical axis to form light spots in a larger range, for example, as shown in fig. 10, a single row of point light spots is spread to a single row of point light spots on both sides, and finally, a lattice point light spot is formed; or a single-strip light spot shown in fig. 12 is diffused to both sides to finally form a plurality of strip-shaped light spots; when the rotation angle of the reflector 400 is increased, the lattice light spots are diffused to two sides to form lattice light spots in a wider range as shown in fig. 11; alternatively, as shown in fig. 13, the surface light spot is diffused in both directions to form a larger area surface light spot.

The larger the rotation angle of the reflector 400 is, the larger the scanned light emitting range is, and the more spots can be formed in the array point or the surface spots with larger spot areas.

As mirror 400 rotates, a larger range of spots is scanned to form different shaped spots. At this time, the distance between the first lens 100 and the light source may or may not be changed. When the distance between the first lens 100 and the light source is not changed, the light spot of a wider range can be scanned only by rotating the reflector 400, so that the light spot conversion can be obtained; when the distance between the first lens 100 and the light source is changed and the reflector 400 is rotated, on the basis that the reflector 400 is rotated to scan a light spot in a wider range, the range of the emergent light spot is changed due to the change of the distance between the first lens 100 and the light source, and the finally formed light spot conversion energy achieves the effect that the light spot is multiplied after the two jointly act, namely, the conversion form of the light spot is more, and the types of the light spot shapes which can be formed are more.

The transformed spots can also be formed in an out-of-focus manner. Defocusing is to specifically apply the optical module to actual use, the light spot formed by the optical module acts on the working surface, the distance between the working surface and the focus forming the light spot can be selected to form the conversion of the light spot, and the corresponding application is completed by the working surface by utilizing the conversion of the light spot.

In summary, to output different light spots and achieve the purpose of changing the light spots, the distance between the first lens 100 and the light source is changed (shift variable N1), the shape of the exit surface of the array mirror 300 is changed (switching variable N2), the defocus (defocus variable N3) and the mirror 400 is rotated and scanned (scan variable N4), so as to form different changing light spots.

The light spot conversion mode can be used singly or in combination, and when the light spots are used in combination, the light spots can be partially combined or can be completely combined. When the above modes of converting light spots are combined for use, the types of the converting light spots are N1, N2, N3 and N4.

For example, when the exit surface of the array mirror 300 is convex in a grid shape as shown in fig. 8, the row point light spots as shown in fig. 7 can be formed, and the range of the formed row point light spots can be changed by adjusting the distance between the first lens 100 and the light source, so that the single row point and the multiple rows of points as shown in fig. 7 can be formed to the array point light spots.

The light spots of the rows of the points are array light spots, and the light spots of the rows of the points can be regarded as one of the array light spots.

On the basis, the reflecting mirror 400 can also be rotated, and the formed light spots are scanned by rotating the reflecting mirror 400, so that the light emitting range is further changed, and the light spot conversion is formed.

As shown in fig. 10 and 11, the range of the single row or matrix spot can be further expanded toward the direction of the rotation of the mirror 400, such as forming a stripe spot, as shown in fig. 12 and 13, and the range of the scanned stripe spot can be further expanded.

In summary, the shape of the light spot can be changed by changing the shape of the array mirror 300, changing the distance between the first lens 100 and the light source, rotating the reflector 400, and defocusing, so that different light spots can be formed according to different combination modes, thereby achieving the purpose of changing the light spot and diversifying the formed light spots.

When the above-described embodiment is applied to a specific scene, for example, in the medical industry, as shown in fig. 20 and 21, the embodiment provides a medical laser device, which includes a housing, and a laser 501 and an optical module of the above-described embodiment disposed in the emitting direction of the laser 501 are disposed in the housing.

The laser 501 is arranged in the shell, laser emitted by the laser 501 is used as a light source, and the light spot which can be changed can be emitted through the optical module, so that different light spot shapes can be applied to different treatments.

Specifically, the housing comprises a handle 503, a spacer 504 and a lens barrel 506, the handle 503 is convenient for a user to hold, the laser 501 is arranged in the spacer 504, the optical module is arranged in the lens barrel 506, and the lens barrel 506 is detachably connected with the spacer 504.

A heat sink 502 is also disposed within the spacer 504, and the heat sink 502 is coupled to the laser 501 to dissipate heat from the laser 501.

The detachable connection can facilitate the replacement of the lens barrel 506, and different lens barrels 506 can correspond to different combinations in the optical module, such as whether the reflector 400 or the third lens 202 is arranged.

Furthermore, the front end of the lens barrel 506 is provided with a replaceable head 5061, the replaceable head 5061 is detachably connected with the lens barrel 506, and the array mirror 300 is located in the replaceable head 5061, so that different array mirrors 300 can be conveniently replaced.

A first motor 505A and a second motor 505B are further included, and the first motor 505A and the second motor 505B are respectively connected to the first lens 100 and the array mirror 300. The first motor 505A drives the first lens 100 to move on the main optical axis to change the distance between the first lens 100 and the laser 501. The second motor 505B drives the array mirror 300 in translation.

As shown in fig. 19, when the optical module includes the mirror 400, a third motor 505C is further included, and the third motor 505C is connected to the mirror 400 to drive the mirror 400 to rotate.

As shown in fig. 20, the light spot formed by the array mirror 300 can be used for performing treatment and the like, and the distance between the working surface and the focal point of the array mirror 300 can be adjusted.

As shown in fig. 22, when the working surface is at the focal position G of the array mirror 300, skin rejuvenation treatment can be performed; when the working surface is far away from the focal position of the array mirror 300, for example, at the position G1, which is called defocus, the spot formed at defocus is different from the focal position, so defocus is another way of spot transformation, and the defocus can be used for depilation treatment or fat dissolving treatment.

The medical laser device comprises the same structure and beneficial effects as the optical module in the previous embodiment. The structure and the advantages of the optical module have been described in detail in the foregoing embodiments, and are not described herein again.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.