阅读说明：本技术 空中成像装置 (Aerial imaging device ) 是由 张亮亮 李军昌 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种空中成像装置包括：显示件、第一微透镜阵列、第二微透镜阵列,显示件具有多个像素点；第一微透镜阵列位于显示件的一侧,且朝向于多个像素点设置,显示件与第一微透镜阵列的距离为L,第一微透镜阵列的焦距为f1,且满足L≥2f1；第二微透镜阵列位于第一微透镜阵列的背离显示件的一侧,第二微透镜阵列的焦距为f2；两个微透镜阵列均具有多个子透镜,多个子透镜在光轴方向上一一对应,每个像素点发出的光线入射于至少一个子透镜,显示件的图像经第一和第二微透镜阵列后在第二微透镜阵列背离第一微透镜阵列的一侧形成浮空实像。由此,成像装置体积小,且产生的实像无翻转和镜像,只要在可视角范围内,可以在任何距离进行观察。(The invention discloses an aerial imaging device, comprising: the display device comprises a display part, a first micro-lens array and a second micro-lens array, wherein the display part is provided with a plurality of pixel points; the first micro lens array is positioned on one side of the display piece and arranged towards the plurality of pixel points, the distance between the display piece and the first micro lens array is L, the focal length of the first micro lens array is f1, and L is more than or equal to 2f 1; the second microlens array is positioned on the side of the first microlens array, which faces away from the display piece, and the focal length of the second microlens array is f 2; the two microlens arrays are respectively provided with a plurality of sub lenses, the sub lenses are in one-to-one correspondence in the direction of an optical axis, light rays emitted by each pixel point are incident on at least one sub lens, and an image of the display piece passes through the first microlens array and the second microlens array and then forms a floating real image on one side of the second microlens array, which is far away from the first microlens array. Therefore, the imaging device is small in size, and the generated real image is free of inversion and mirror image, so long as observation can be performed at any distance within the range of the visual angle.)

1. An aerial imaging device, comprising:

a display having a plurality of pixels for displaying an image;

the first micro-lens array is positioned on one side of the display piece and arranged towards the pixel points, the distance between the display piece and the first micro-lens array is L, the focal length of the first micro-lens array is f1, and L is more than or equal to 2f 1;

a second microlens array located on a side of the first microlens array facing away from the display, the second microlens array having a focal length f 2;

the second microlens array and the first microlens array are respectively provided with a plurality of sub-lenses, the sub-lenses of the first microlens array and the sub-lenses of the second microlens array are in one-to-one correspondence in the optical axis direction, light rays emitted by each pixel point are incident on at least one sub-lens, the distance between the first microlens array and the second microlens array is d, and d is f1+ f 2; an image displayed by the display part passes through the first micro-lens array and the second micro-lens array, and then forms a floating real image on one side of the second micro-lens array, which is far away from the first micro-lens array.

2. The aerial imaging device of claim 1, further comprising:

a field of view control disposed between the display and the first microlens array.

3. The aerial imaging device of claim 2, wherein the field of view control is against a face of the display facing the first microlens array.

4. The aerial imaging device of claim 2, wherein the field-of-view control has a plurality of arrayed circular aperture stops.

5. The aerial imaging device of claim 4, wherein each of the circular aperture stops has a field angle < 10 °.

6. The aerial imaging device of claim 4, wherein a surface of the circular aperture stop is coated with a black light absorbing material.

7. Aerial imaging device according to claim 1, wherein L ≧ 5f 1.

8. The aerial imaging device of claim 1, wherein a light blocking portion is disposed between adjacent sub-lenses of the first microlens array and/or between adjacent sub-lenses of the second microlens array, the light blocking portion being disposed on at least one of a light entrance side and a light exit side of the first microlens array or the second microlens array.

9. Aerial imaging device according to any of claims 1 to 8, wherein the first microlens array, the second microlens array each comprise:

a substrate having a plurality of mounting holes;

a plurality of sub-lenses mounted within the mounting holes.

10. The aerial imaging device of claim 9, wherein the substrate of the first microlens array and the substrate of the second microlens array are parallel to each other, the display member is of a flat plate-shaped structure, the display member and the substrate of the first microlens array are parallel to each other, or the display member is inclined with respect to the substrate of the first microlens array at an acute angle; or

The display piece is of an arc surface shape, and the concave surface of the arc surface shape faces the first micro-lens array.

11. The aerial imaging device of any of claims 1-8, further comprising:

the optical sensor is used for capturing the gesture motion of a person in the area formed by the floating real image or the touch point on the floating real image;

the control piece host computer is electrically connected with the display piece in a wired or wireless mode so as to control the image display and switching of the display piece.

Technical Field

The invention relates to the technical field of optical imaging, in particular to an aerial imaging device.

Background

The micro lens array is an array formed by lenses with micron-sized clear apertures and nano-sized relief depths, and has small array unit size, high integration level, focusing, imaging and other functions. At present, the method is mainly used for systems such as wave front sensing, infrared focal plane detection, CCD array light energy gathering, laser array scanning, laser display, optical fiber coupling and the like. The non-contact aerial imaging technology on the market at present rarely utilizes a micro-lens array to image and is mostly realized by utilizing a dihedral angle reflector array (DCRA), but the technology has a very obvious disadvantage that the DCRA needs to form a certain included angle (generally 45 degrees is optimal) with an object plane when in use and cannot be used under the condition of being parallel to the object plane, so that the volume of the equipment is larger, and the larger the size of a display part is, the thicker the whole thickness of the equipment is. The imaging device based on the micro lens array can be used under the condition of being parallel to the object plane, the object distance is small, and the thickness cannot be increased along with the increase of the size of the display piece. The imaging device can present a floating real image at the symmetrical position of the display piece relative to the micro lens array device, has a smaller field angle and can play a role in preventing peeping.

The non-contact aerial imaging equipment on the market at present leads to overlarge equipment volume due to the dependence of imaging quality on included angles between an imaging element and a display piece, cannot meet the requirement of the electronic device on compactness at present, and cannot be suitable for small and portable electronic devices.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to propose an aerial imaging device.

An aerial imaging device according to an embodiment of the first aspect of the invention comprises: the display comprises a display part, a first micro-lens array and a second micro-lens array, wherein the display part is provided with a plurality of pixel points for displaying images; the first micro lens array is positioned on one side of the display piece and arranged towards the plurality of pixel points, the distance between the display piece and the first micro lens array is L, the focal length of the first micro lens array is f1, and L is more than or equal to 2f 1; the second microlens array is located on one side, away from the display, of the first microlens array, the focal length of the second microlens array is f2, the second microlens array and the first microlens array are respectively provided with a plurality of sub lenses, the sub lenses of the first microlens array and the sub lenses of the second microlens array correspond to each other in the optical axis direction one by one, light rays emitted by each pixel point are incident on at least one sub lens, the distance between the first microlens array and the second microlens array is d, and d is f1+ f 2; an image displayed by the display part passes through the first micro-lens array and the second micro-lens array, and then forms a floating real image on one side of the second micro-lens array, which is far away from the first micro-lens array.

According to the aerial imaging device disclosed by the embodiment of the invention, by utilizing the principle that the optical path in the integrated imaging method is reversible, the first micro lens array plays a role in recording a light field, and the second micro lens array plays a role in reproducing a three-dimensional scene. That is, for the sub-lenses b of the first microlens array, the light source enters as approximately parallel light, and is approximately converged on the back focal plane of each sub-lens b (also equivalent to the front focal plane of the second microlens array), and then, for each sub-lens b of the second microlens array, the outgoing light rays are also approximately parallel light, and all the outgoing light rays are converged at the position where the light source is symmetrical with respect to the microlens array, through the second microlens array. Therefore, the imaging device is small in size, and the generated real image is free from overturning and mirror image, and can be observed at any distance as long as the real image is observed within the visual angle range.

In some embodiments, further comprising: a field of view control disposed between the display and the first microlens array.

In some embodiments, the field-of-view control member abuts a side of the display member facing the first microlens array.

In some embodiments, the field-of-view control member has a plurality of arrayed circular aperture stops.

In some embodiments, the field angle of each of the circular aperture stops is < 10 °.

In some embodiments, a surface of the circular aperture stop is coated with a black light absorbing material.

In some embodiments, L ≧ 5f 1.

In some embodiments, a light shielding portion is disposed between adjacent sub-lenses of the first microlens array and/or between adjacent sub-lenses of the second microlens array, and the light shielding portion is disposed on at least one of a light incident side and a light exiting side of the first microlens array or the second microlens array.

In some embodiments, the first microlens array, the second microlens array each comprise: the lens comprises a substrate and a plurality of sub-lenses, wherein the substrate is provided with a plurality of mounting holes; the sub-lenses are mounted in the mounting holes.

In some embodiments, the substrate of the first microlens array and the substrate of the second microlens array are parallel to each other, the display member is of a flat plate-shaped structure, the display member and the substrate of the first microlens array are parallel to each other, or the display member is inclined relative to the substrate of the first microlens array and has an acute included angle; or

The display piece is of an arc surface shape, and the concave surface of the arc surface shape faces the first micro-lens array.

In some embodiments, further comprising: the control system comprises an optical sensor and a control piece host, wherein the optical sensor is used for capturing gesture actions of people in an area formed by a floating real image or touch points on the floating real image; the control piece host is electrically connected with the display piece in a wired or wireless mode so as to control the image display and switching of the display piece.

The aerial imaging device of the embodiment of the invention mainly solves two problems: the volume of the equipment related to the aerial imaging technology is reduced, so that the equipment is applied to small and portable electronic devices; and secondly, the visual angle of the equipment is reduced, so that the peep-proof effect is achieved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of an imaging principle of an aerial imaging device according to an embodiment of the present invention.

Fig. 2A, 2B and 2C are schematic diagrams of several shapes and arrangements of the first/second microlens arrays of the aerial imaging device according to the embodiment of the invention.

Fig. 3A and 3B are schematic front and side views of an aerial imaging device according to an embodiment of the invention.

Fig. 4 is a schematic structural diagram of a field-of-view control of an aerial imaging device according to an embodiment of the invention.

Fig. 5 is an imaging schematic view of a display member of the aerial imaging device according to the first embodiment of the present invention (the display member is disposed in parallel with the first microlens array).

Fig. 6 is an imaging schematic diagram of a display member of an aerial imaging device according to a second embodiment of the invention (the display member is tilted, disposed at an angle relative to the first microlens array).

FIG. 7 is a schematic diagram of interfering light rays generated when a display member of an aerial imaging device is tilted according to an embodiment of the invention.

Fig. 8 is an imaging schematic diagram of an aerial imaging device according to an embodiment of the present invention when the display is curved.

Fig. 9 is a schematic diagram of the light shielding portion 110 of the first microlens array of the aerial imaging device according to the second embodiment of the present invention.

Fig. 10 is an image forming principle diagram of the shading portion 110 of the aerial image forming apparatus according to the second embodiment of the present invention.

Fig. 11 is a schematic diagram of an aerial imaging device implementing human-computer interaction according to an embodiment of the invention.

Reference numerals:

the aerial imaging device 100, the display part 101, the field control part 102, the object plane image 103, the micro-lens array device 104, the first micro-lens array 105, the second micro-lens array 106, the image plane 107, the floating real image 108, the substrate a, the sub-lens b, the mounting hole c,

the device comprises a circular aperture diaphragm 109, a light shielding part 110, an optical sensor 111, a control member host 112 and an interference light ray 1.

Detailed Description

Embodiments of the present invention are described in detail below, the embodiments described with reference to the drawings being exemplary, and an aerial imaging device 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 11.

As shown in fig. 1, an aerial imaging device 100 according to an embodiment of the first aspect of the invention includes: a display 101, a first microlens array 105, and a second microlens array 106.

The display member 101 has a plurality of pixel points for displaying an image. The display 101 may be a plane or a curved surface, and may be a set of one or more plane display 101, and each plane display 101 may be in a different spatial position. The viewing angle of the display 101 is small and the viewing angle perpendicular to the display plane from the normal may range from-30, preferably from-10, 10.

The first microlens array 105 is located on one side of the display 101 and is disposed facing the pixel, a distance between the display 101 and the first microlens array 105 is L, a focal length of the first microlens array 105 is f1, and L is greater than or equal to 2f 1. The first microlens array 105 and the second microlens array 106 form a microlens array device 104, and the display 101 may be parallel to the microlens array device 104 or may be tilted, that is, the display 101 and the microlens array device 104 form a certain included angle.

The second microlens array 106 is located on a side of the first microlens array 105 away from the display 101, a focal length of the second microlens array 106 is f2, the second microlens array 106 and the first microlens array 105 both have a plurality of sub-lenses b, the sub-lenses b of the first microlens array 105 and the sub-lenses b of the second microlens array 106 are in one-to-one correspondence in the optical axis direction, light emitted by each pixel point is incident on at least one sub-lens b, a distance between the first microlens array 105 and the second microlens array 106 is d, and d is f1+ f 2.

In other words, the focal length of the sub-lens b in the first microlens array 105 is f1, and the focal length of the sub-lens b in the second microlens array 106 is f2, wherein f1 and f2 may be equal or different, and are not limited herein. The aperture sizes and the arrangement of the sub-lenses b of the first microlens array 105 and the sub-lenses b of the second microlens array 106 may be the same, and the optical axes of the two sub-lenses b at the same positions of the first microlens array 105 and the second microlens array 106 are coincident. The center-to-center distance between the sub-lens b of the first microlens array 105 and the sub-lens b of the second microlens array 106 is f1+ f2, i.e., the back focal plane of the first microlens array 105 coincides with the front focal plane of the second microlens array 106.

As shown in fig. 4, an image displayed on the display 101 passes through the first microlens array 105 and the second microlens array 106, and then forms a floating real image 108 on a side of the second microlens array 106 away from the first microlens array 105.

The position of the floating real image 108 is related only to the distance L of the display 101 from the first microlens array 105, and the closer the display 101 is to the microlens array device 104, the closer the floating real image 108 is to the microlens array device 104.

Referring to fig. 1, the imaging principle of the aerial imaging device 100 is as follows: the first microlens array 105 and the second microlens array 106 can jointly form the microlens array device 104, the focal length of the sub-lenses b of the first microlens array 105 is f1, the focal length of the sub-lenses b of the second microlens array 106 is f2, the first microlens array 105 and the second microlens array 106 are arranged in parallel, the center distance of the microlenses is f1+ f2, and namely, the rear focal plane of the first microlens array 105 is coincident with the front focal plane of the second microlens array 106. The optical axes of the two sub-lenses b at the same position of each of the first microlens array 105 and the second microlens array 106 are coincident, so that each beam of light passes through the sub-lens b at the corresponding position after passing through the sub-lens b of the first microlens array 105 and then passing through the second microlens array 106, thereby eliminating the influence of the interference light 1 and improving the imaging quality. The optimal position of the display 101 is that the display 101 is placed at a position which is 2 times of the focal length of the first microlens array 105 and is far away from the focal length of the first microlens array 105, the light source emitted by each pixel of the display 101 can be understood as a point light source with a certain divergence angle, the light emitted by the pixel passes through a plurality of sub-lenses b of the first microlens array 105, the originally divergent light starts to converge, the light converges between the first microlens array 105 and the second microlens array 106 into a plurality of points, the points diverge again, the points pass through the corresponding sub-lenses b with coincident optical axes on the second microlens array 106 and are focused on a focal plane to form a floating pixel, and a set of a plurality of floating pixels forms a floating real image 108.

The aerial imaging device 100 according to an embodiment of the present invention utilizes the principle of reversible optical paths in an integrated imaging method, in which the first microlens array 105 functions to record a light field and the second microlens array 106 functions to reproduce a three-dimensional scene. That is, for the sub-lenses b of the first microlens array 105, the light source enters as approximately parallel light, and is converged on the back focal plane of each sub-lens b (which is also equivalent to the front focal plane of the second microlens array 106), and then, for each sub-lens b of the second microlens array 106, the emergent light rays are also approximately parallel light by the second microlens array 106, and all the emergent light rays are converged at the position where the light source is symmetrical with respect to the microlens array device 104. Therefore, the aerial imaging device 100 is small in size, and the generated real image has no conditions such as overturning and mirror image which are unfavorable for imaging, and the imaging effect can be observed at any distance within the range of the visual angle.

Referring to fig. 4, in some embodiments, the first microlens array 105 and the second microlens array 106 include: the lens module comprises a substrate a and a plurality of sub-lenses b, wherein the substrate a is provided with a plurality of mounting holes c, and the sub-lenses b are mounted in the mounting holes c. Thus, the sub-lenses b are fitted or bonded into the mounting holes c of the substrate a, thereby making the first and second microlens arrays 105 and 106 more compact.

In addition, the substrates a of the first microlens array 105 and the second microlens array 106 may be integrated together, for example, by bonding, and the first microlens array 105 and the second microlens array 106 are formed together as one device, that is, the microlens array device 104.

Further, each sub-lens b may be a spherical plano-convex lens or an aspherical plano-convex lens or a spherical biconvex lens or an aspherical biconvex lens. That is, the sub-lens b of each microlens array may be a plano-convex lens or a biconvex lens, and the lens may be spherical or aspherical. When the sub-lens b adopts an aspheric lens, the imaging aberration is small, and the imaging quality is good.

As shown in fig. 2, the shape and arrangement of the sub-lenses b of the first microlens array 105 and the second microlens array 106 may be the same, and in the embodiment, the arrangement of the sub-lenses b includes, but is not limited to, a hexagonal array, a rectangular array, and a circular array. That is, the sub-lenses b of the first microlens array 105 and the second microlens array 106 are spherical structures, and the peripheries thereof may be circular, rectangular, hexagonal, and the like. For example, the sub-lenses b of the first microlens array 105 and the second microlens array 106 are arranged in a rectangular or hexagonal shape, the effective area of the sub-lenses b arranged in the first microlens array 105 and the second microlens array 106 is larger than the effective area of the display 101, and the effective area of the display 101 may be a region where the display 101 can display an image.

In an embodiment, in order to improve the imaging quality and achieve the peep-proof effect, the aerial imaging device 100 requires the viewing angle of the display 101 to be as small as possible, and therefore the display 101 with a small viewing angle is preferable. For the display 101 with a larger viewing angle, as shown in fig. 3A and 3B, the aerial imaging device 100 according to the embodiment of the present invention further includes a field-of-view control member 102, where the field-of-view control member 102 is disposed between the display 101 and the first microlens array 105. The view field control member 102 may be an array structure formed by a plurality of circular aperture diaphragms 109, the view field control member 102 may adjust the angle of the light emitted by the display member 101, so as to reduce the viewing angle of the display member 101 and achieve the function of peep prevention, and the view field control member 102 may improve the quality and symmetry of the light emitted by the display member 101 and improve the quality of the final imaging by using the circular aperture diaphragms 109.

Optionally, the field-of-view control member 102 is attached to a surface of the display member 101 facing the first microlens array 105. That is, the field control member 102 may be installed at a side of the display member 101 on which an image is displayed. Therefore, the view field control member 102 is tightly attached to the display member 101, the arrangement is more compact, and light path control of light rays emitted by pixel points of the display member 101 is more convenient.

Specifically, the field control member 102 has a plurality of circular aperture stops 109 distributed in an array. Therefore, the circular aperture diaphragm 109 can reasonably control the field angle of light emitted by each pixel point, and the quality and symmetry of light beams are improved.

Further, the angle of view of each circular aperture stop 109 is < 10 °. Therefore, the light control on each pixel point of the display part 101 is better, and the divergence of the light is reduced.

In order to reduce the influence of the circular aperture stop 109 on the light, the surface of the circular aperture stop 109 may be coated with a black light absorbing material.

In some embodiments, L ≧ 5f 1. The focal lengths of the sub-lens b of the first microlens array 105 and the sub-lens b of the second microlens array 106 of the aerial imaging device 100 according to the embodiment of the invention are f1 and f2, respectively, the distance between the two microlens arrays is f1+ f2, and the distance from the object plane image 103 to the microlens array device 104 is as large as possible, that is, the distance between the field control member 102 and the first microlens array 105 needs to be as large as possible, preferably greater than 5f1, and the imaging effect is better at this time.

As shown in fig. 5, the imaging principle of the aerial imaging device 100 provided with the field-of-view control member 102 is as follows: each pixel point of the display part 101 can be regarded as a point light source with a certain divergence angle, light emitted by each pixel point firstly passes through the view field control part 102, the divergence angle of the light is reduced, then the light passes through a plurality of sub-lenses b of the first micro-lens array 105, the light is converged into a point at the rear focal plane position of each sub-lens b, then the light is diverged, the light passes through the sub-lenses b with the corresponding optical axes superposed on the second micro-lens array 106, then the light is focused into floating pixel points at positions of the pixel points symmetrical about the micro-lens array device 104, and the floating pixel points are collected and combined on an image plane 107 at a position L away from the center of the micro-lens array device 104 to form a floating real image.

In some embodiments of the present invention, the specific arrangement of the display 101 and the microlens array apparatus 104 can be implemented in the following three ways:

in a first mode, the display 101 is a flat structure, the display 101 and the substrate a of the first microlens array 105 are parallel to each other, and the substrate a of the first microlens array 105 and the substrate a of the second microlens array 106 are parallel to each other.

Specifically, as shown in fig. 5, the display 101 is a plane device and is disposed parallel to the first microlens array 105 and the second microlens array 106, the viewing angle of the display 101 from the normal perpendicular to the display plane is in the range of [ -10 °,10 ° ] interval, which is disposed outside twice the focal length of the first microlens array 105, and the distance from the display 101 to the center of the microlens array device 104 is L. At this time, the focal lengths of the sub-lenses b of the first microlens array 105 and the second microlens array 106 are equal, i.e., f1 is f 2.

In the second mode, the display 101 is disposed obliquely relative to the substrate a of the first microlens array 105, and the relative angle between the two is an acute angle.

Specifically, as shown in fig. 6, the display 101 is disposed at an angle to the first microlens array 105 and the second microlens array 106, and when the pixel point of the display 101 is L1 from the center of the microlens array device 104, the imaging point is L1 from the center of the microlens array device 104; when the pixel point of the display 101 is L2 from the center of the microlens array apparatus 104, the imaging point is L2 from the center of the microlens array apparatus 104, and so on, i.e., the pixel point and the imaging point are equidistant from the center of the microlens array apparatus 104. However, as shown in fig. 7, when the display 101 is disposed at an angle to the first microlens array 105 and the second microlens array 106, since the light source of the display 101 is obliquely incident to the first microlens array 105, the marginal light may be incident to the adjacent sub-lens b cell at the boundary between the first microlens array 105 and the second microlens array 106, and thus the disturbing light 1 occurs, which affects the imaging quality.

In a third mode, the display 101 is arc-shaped, and the concave surface of the display 101 faces the first microlens array 105.

Specifically, the display 101 may be a plane or a curved surface. Fig. 8 is an imaging principle diagram of the display 101 having a curved surface, and as shown in fig. 8, the central axis of the light-emitting angle of each pixel of the curved display 101 is perpendicular to the first microlens array 105 and the second microlens array 106. When the display 101 is curved, since the edge light of the display 101 is obliquely incident to the first microlens array 105, the edge light may be incident to the neighboring sub-lens b at the boundary between the first microlens array 105 and the second microlens array 106, so that the disturbing light 1 occurs, which affects the imaging quality, and the principle is the same as that of the disturbing light 1 generated when the display 101 is obliquely disposed.

Further, in order to reduce the occurrence of the disturbance light 1, in some embodiments, a light shielding process is performed between adjacent sub-lenses b of the first microlens array 105 and/or between adjacent sub-lenses b of the second microlens array 106, and a substance used for the light shielding process is an opaque substance, preferably a black light absorbing material.

As shown in fig. 9 and 10, a light shielding portion 110 is provided between adjacent sub-lenses b of the first microlens array 105 and/or between adjacent sub-lenses b of the second microlens array 106, and the light shielding portion 110 is provided on at least one of the light entrance side and the light exit side of the first microlens array 105 or the second microlens array 106. The light blocking portion 110 may be an opaque material or other structure capable of blocking light to reduce the effect of stray light on the imaging quality. In an embodiment, when the light shielding portion 110 is manufactured, a black light absorbing material may be blended in the manufacturing material, or a black pasting process may be performed between the sub-lenses b, where the pasting is black, so as to effectively prevent the edge light of the display 101 from entering the sub-lenses b, and reduce the influence of the interference light 1 and the reflected light on the imaging quality.

To facilitate the arrangement of the light shielding portions 110, as shown in fig. 10, the light shielding portions 110 are arranged on the substrate a of the microlens array, for example, the light shielding portions 110 may be arranged on the substrate a in any one of the following manners: spraying, plating and sticking. When the light shielding portion 110 is sprayed on the first microlens array 105 and the second microlens array 106, the light shielding portion 110 may be formed as a light shielding coating; when the light shielding portion 110 is plated on the first microlens array 105 and the second microlens array 106, the light shielding portion 110 may be formed as a light shielding plating; when the light shielding portion 110 is attached to the first microlens array 105 and the second microlens array 106, the light shielding portion 110 may be formed as a light shielding layer or a light shielding plate.

As shown in fig. 10, the aerial imaging device 100 is provided with a field-of-view control member 102 and performs shading processing on a first microlens array 105 and a second microlens array 106. The display 101 is a flat panel display and is disposed parallel to the first microlens array 105 and the second microlens array 106, and the viewing angle of the display 101 perpendicular to the display plane and away from the normal is in the range of [ -10 °, -10 ° ] and is disposed outside twice the focal length of the first microlens array 105.

Specifically, each pixel point of the display 101 can be regarded as a point light source with a certain divergence angle, light emitted by the pixel point first passes through the view field control member 102, the divergence angle of the light is reduced, then the light passes through the sub-lenses b of the first microlens array 105, light near the edge of each sub-lens b is absorbed by the light shielding part 110 of the first microlens array 105, the light passing through the sub-lenses b of the first microlens array 105 is mostly converged into a point at the back focal plane position of each sub-lens b, and then is diverged, and a small number of light is absorbed by the light shielding part 110 of the second microlens array 106, so as to prevent the incident sub-lenses b around from generating interference light. The light rays passing through the second microlens array 106 are then focused into floating pixels at symmetrical positions with respect to the microlens array arrangement 104, and a plurality of floating pixels are collected to form a floating real image on the image plane 107 at a distance L from the center of the microlens array arrangement 104.

In some embodiments, the aerial imaging device 100 of the embodiments of the invention can also implement human-computer interaction functions. As shown in fig. 11, the aerial imaging device 100 further includes: the optical sensor 111 and the control unit host 112 are used for capturing gesture actions of people in the area where the floating real image 108 is formed or touch points on the floating real image 108; the control member host 112 is electrically connected to the display member 101 by wire or wirelessly to control image display and switching of the display member 101.

In other words, as shown in fig. 11, the aerial imaging device 100 according to the embodiment of the invention can add human-computer interaction, in which the effective area captured by the optical sensor 111 is larger than the effective area of the floating real image 108, the gesture motion or the touch position of the person is captured by the optical sensor 111, and then the gesture motion or the touch position is processed by the control unit host 112, and a signal is sent to the display unit 101, so as to implement human-computer interaction. The sensing form of the optical sensor 111 includes, but is not limited to, far and near infrared, ultrasonic, laser interference, grating, encoder, fiber optic or CCD (Charge-coupled Device), etc. The sensing area of the optical sensor 111 and the floating real image 108 are located on the same plane and include a three-dimensional space where the floating real image is located, an optimal sensing form can be selected according to an installation space, a viewing angle and a use environment, a user can conveniently operate the floating real image 108 in an optimal posture, and the sensitivity and convenience of user operation are improved. The control unit host 112 is connected to the optical sensor 111 in a wired or wireless manner, and transmits a digital signal or an analog signal, so that the volume of the microlens array apparatus 104 can be flexibly controlled.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.