阅读说明：本技术 一种基于液压控制的可变焦微透镜 (Variable-focus micro lens based on hydraulic control ) 是由 江帆 江志超 陈美蓉 温锦锋 于 2021-01-05 设计创作，主要内容包括：本发明公开一种基于液压控制的可变焦微透镜,包括壳体、设置在壳体上下两端的镜片以及透明的弹性薄膜；所述弹性薄膜设置在壳体内腔中,所述弹性薄膜将所述壳体的内腔分为上腔体和下腔体,所述上腔体和下腔体中均填充满透明液体；所述上腔体和下腔体上分别设有可改变腔体内透明液体压力的上变压调节机构和下变压调节机构。本发明通过上下变压调节机构改变上腔体和下腔体中的透明液体的压强,并利用两个透明液体的压力差作用,促使弹性膜片发生弹性形变,进而改变薄膜的曲率半径,实现改变光的聚焦,从而实现变聚焦成像。(The invention discloses a variable-focus micro lens based on hydraulic control, which comprises a shell, lenses arranged at the upper end and the lower end of the shell and a transparent elastic film, wherein the lenses are arranged on the upper end and the lower end of the shell; the elastic film is arranged in an inner cavity of the shell, the inner cavity of the shell is divided into an upper cavity and a lower cavity by the elastic film, and the upper cavity and the lower cavity are filled with transparent liquid; an upper variable pressure adjusting mechanism and a lower variable pressure adjusting mechanism which can change the pressure of the transparent liquid in the cavity are respectively arranged on the upper cavity and the lower cavity. The invention changes the pressure of the transparent liquid in the upper cavity and the lower cavity through the upper and lower variable pressure adjusting mechanisms, and uses the pressure difference effect of the two transparent liquids to promote the elastic diaphragm to generate elastic deformation, thereby changing the curvature radius of the film, realizing the change of light focusing and further realizing the variable focusing imaging.)

1. A variable focus micro lens based on hydraulic control is characterized by comprising a shell, lenses arranged at the upper end and the lower end of the shell and a transparent elastic film; the elastic film is arranged in an inner cavity of the shell, the inner cavity of the shell is divided into an upper cavity and a lower cavity by the elastic film, and the upper cavity and the lower cavity are filled with transparent liquid; an upper variable pressure adjusting mechanism and a lower variable pressure adjusting mechanism which can change the pressure of the transparent liquid in the cavity are respectively arranged on the upper cavity and the lower cavity.

2. The variable focus microlens based on hydraulic control as claimed in claim 1, wherein the upper cavity is provided with an upper microfluidic channel extending transversely, and the upper microfluidic channel is connected with the upper variable pressure adjusting mechanism; and the lower cavity is provided with a lower micro-flow channel which extends transversely and is connected with the lower variable pressure regulating mechanism.

3. The variable focus microlens as claimed in claim 2, wherein the number of the upper and lower micro flow channels is greater than or equal to 2.

4. The variable focus microlens as claimed in claim 2, wherein an upper piston assembly is provided in the upper microfluidic channel, the upper piston assembly including an upper slider and an upper piston, the upper slider being provided outside the upper piston; and a lower piston assembly is arranged in the lower micro-flow channel and comprises a lower sliding block and a lower piston, and the lower sliding block is arranged on the outer side of the lower piston.

5. The variable focus microlens as claimed in claim 1, wherein the upper variable pressure adjusting mechanism and the lower variable pressure adjusting mechanism are both hydraulic transmission mechanisms.

6. The variable focus microlens of claim 1 wherein the transparent liquid in the upper chamber has a different refractive index than the transparent liquid in the lower chamber.

7. The variable focus microlens as claimed in claim 2, wherein the upper varying voltage adjusting mechanism includes a push-pull button disposed in the upper microfluidic channel and located outside the upper slider; the push-pull button and the inner wall of the upper microflow channel are fixed in position through a locking structure.

8. The variable focus microlens as claimed in claim 7, wherein the lower varying pressure adjusting mechanism includes an elastic member disposed between the lower slider and the lower microfluidic channel.

9. The variable focus microlens as claimed in claim 7, wherein the locking structure between the push-pull button and the upper microfluidic channel is a screw structure.

10. The variable focus microlens as claimed in claim 7, wherein the down-conversion adjusting mechanism is a hydraulic transmission mechanism.

Technical Field

The invention relates to a lens device, in particular to a variable-focus micro lens based on hydraulic control.

Background

The lens optical zoom imaging system can adjust the system to a proper focal length according to the actual use condition, thereby meeting the use requirement. However, the conventional lens optical zoom imaging system has the disadvantages of various structural components, serious mechanical abrasion, difficult processing, inconvenient operation, high manufacturing cost and the like. With the development of science and technology, microlenses have been widely used in the fields of optical testing equipment, optical communication, medical treatment, etc., but the conventional common lenses cannot meet the application requirements of these fields. Therefore, there is a need for a variable focus microlens that is more lightweight, miniaturized, and automated.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a variable-focus micro lens based on hydraulic control, which has the advantages of simple structure, convenience in control, high curvature radius change precision and convenience in controlling the imaging effect.

The purpose of the invention is realized by the following technical scheme:

a variable focus micro lens based on hydraulic control is characterized by comprising a shell, lenses arranged at the upper end and the lower end of the shell and a transparent elastic film; the elastic film is arranged in an inner cavity of the shell, the inner cavity of the shell is divided into an upper cavity and a lower cavity by the elastic film, and the upper cavity and the lower cavity are filled with transparent liquid; an upper variable pressure adjusting mechanism and a lower variable pressure adjusting mechanism which can change the pressure of the transparent liquid in the cavity are respectively arranged on the upper cavity and the lower cavity.

The working principle of the variable-focus micro lens based on hydraulic control is as follows:

the variable-focus micro lens based on hydraulic control is arranged on corresponding detection equipment; when the focal length needs to be adjusted and the imaging effect is changed, a user can change the curvature radius of the elastic film in the shell through the upper variable pressure adjusting mechanism or the lower variable pressure adjusting mechanism. Specifically, for example: the pressure of the transparent liquid in the upper cavity is increased by a user through the upper variable pressure adjusting mechanism, so that the pressure in the upper cavity is greater than that in the lower cavity, the radius of upward bending of the elastic film is reduced, and the focusing imaging of light is instantaneously changed through the change of the curvature radius of the elastic film, so that the requirements of the user are met; when the pressure in the upper cavity is increased through the upper variable pressure adjusting mechanism, the elastic film deforms, so that certain pressure can be generated on the transparent liquid in the lower cavity, the lower variable pressure adjusting mechanism can also be automatically adjusted under the action of the transparent liquid in the lower cavity, and the transparent liquid in the upper cavity and the transparent liquid in the lower cavity are kept balanced.

In a preferred embodiment of the present invention, the upper chamber is provided with an upper microfluidic channel extending transversely, and the upper microfluidic channel is connected to the upper variable pressure adjustment mechanism; and the lower cavity is provided with a lower micro-flow channel which extends transversely and is connected with the lower variable pressure regulating mechanism.

Preferably, the number of the upper microfluidic channels and the number of the lower microfluidic channels are both greater than or equal to 2. In this embodiment, the upper microfluidic channel and the lower microfluidic channel are both provided with two microfluidic channels, and the two microfluidic channels are arranged oppositely.

Preferably, an upper piston assembly is arranged in the upper micro-flow channel, the upper piston assembly comprises an upper sliding block and an upper piston, and the upper sliding block is arranged on the outer side of the upper piston; and a lower piston assembly is arranged in the lower micro-flow channel and comprises a lower sliding block and a lower piston, and the lower sliding block is arranged on the outer side of the lower piston.

In a preferred scheme of the invention, the upper variable pressure adjusting mechanism and the lower variable pressure adjusting mechanism are both hydraulic transmission mechanisms.

In a preferred embodiment of the present invention, the transparent liquid in the upper cavity has a different refractive index from the transparent liquid in the lower cavity.

In a preferred embodiment of the present invention, the upper variable voltage adjustment mechanism includes a push-pull button disposed in the upper microfluidic channel and located outside the upper slider; the push-pull button and the inner wall of the upper microflow channel are fixed in position through a locking structure.

Preferably, the lower variable pressure adjusting mechanism comprises an elastic element, and the elastic element is arranged between the lower sliding block and the lower microfluidic channel.

Preferably, the locking structure between the push-pull button and the upper microfluidic channel is a threaded structure.

Preferably, the lower variable pressure adjusting mechanism is a hydraulic transmission mechanism.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention changes the pressure of the transparent liquid in the upper cavity and the lower cavity through the upper and lower variable pressure adjusting mechanisms, and uses the pressure difference effect of the two transparent liquids to promote the elastic diaphragm to generate elastic deformation, thereby changing the curvature radius of the film, realizing the change of light focusing and further realizing the variable focusing imaging.

2. The invention realizes synchronous generation of pressure difference by utilizing the transparent liquid of the upper cavity and the lower cavity, so that the elastic film is instantly deformed, the operation is simple, the sensitivity is high, the change precision of the curvature radius is high, meanwhile, the form of the elastic film can be effectively and stably maintained, the change precision of the curvature radius is high, and the imaging effect is good.

3. The invention adopts transparent liquid as a transfer medium, so that the transfer of the pressure intensity can be instantly carried out, the deformation of the elastic film can be synchronously carried out, and the instant and efficient change of the light focusing imaging of the micro-lens is realized.

Drawings

Fig. 1-2 are schematic structural views of a first embodiment of a variable focus microlens based on hydraulic control according to the present invention, wherein fig. 1 is a front cross-sectional view, and fig. 2 is a perspective view.

Detailed Description

The present invention will be further described with reference to the following examples and drawings, but the embodiments of the present invention are not limited thereto.

Referring to fig. 1-2, the variable focus microlens based on hydraulic control of the present embodiment includes a housing 1, lenses 2 disposed at upper and lower ends of the housing 1, and a transparent elastic film 5; the elastic film 5 is arranged in the inner cavity of the shell 1, the inner cavity of the shell 1 is divided into an upper cavity 3 and a lower cavity 4 by the elastic film 5, and the upper cavity 3 and the lower cavity 4 are filled with transparent liquid; an upper variable pressure adjusting mechanism and a lower variable pressure adjusting mechanism which can change the pressure of the transparent liquid in the cavity are respectively arranged on the upper cavity 3 and the lower cavity 4. Transparent liquid is filled in the upper cavity 3 and the lower cavity 4, and the upper cavity and the lower cavity are in a sealed state, so that the pressure of the liquid is transmitted instantly, and the curvature radius of the elastic film 5 is adjusted.

Referring to fig. 1-2, an upper microfluidic channel 8 extending transversely is provided on the upper chamber 3, and the upper microfluidic channel 8 is connected to the upper variable pressure regulating mechanism; and a lower micro-flow channel 11 transversely extending is arranged on the lower cavity 4, and the lower micro-flow channel 11 is connected with the lower variable pressure regulating mechanism. Through the setting of last miniflow passageway 8 and miniflow passageway 11 down, be convenient for with last vary voltage adjustment mechanism with vary voltage adjustment mechanism is connected down, simultaneously through the miniflow passageway that transversely extends the setting, when carrying out the vary voltage operation, can control better to reduce the influence to going up cavity 3 and cavity 4 down, be favorable to elastic film 5 to stabilize effectual radius change. In addition, in the upper chamber 3 and the lower chamber 4, the transparent liquid is difficult to compress and expand under normal conditions, and by the arrangement of the micro flow pipe, a space can be provided for the liquid to flow after the pressure difference is formed, thereby providing a space for the deformation of the elastic membrane 5.

Referring to fig. 1-2, the number of the upper microfluidic channels 8 and the number of the lower microfluidic channels 11 are both greater than or equal to 2. In this embodiment, two micro flow channels are disposed in the upper micro flow channel 8 and the lower micro flow channel 11, and the two micro flow channels are disposed oppositely.

Referring to fig. 1-2, an upper piston assembly is arranged in the upper microfluidic channel 8, and comprises an upper slide block 6 and an upper piston 7, wherein the upper slide block 6 is arranged outside the upper piston 7; the lower micro-flow channel 11 is provided with a lower piston assembly which comprises a lower slide block 9 and a lower piston 10, and the lower slide block 9 is arranged on the outer side of the lower piston 10. Through the setting of slider and piston, the leakproofness of piston to transparent liquid is good, is favorable to combining with having the hydraulic drive that removes steadily, realizes the instant transmission of pressure to effectively improve the sensitivity that the formation of image changes. In addition, when the piston assembly at one end moves leftwards to cause the pressure of the transparent liquid to increase, the piston assembly at the other end moves rightwards to keep the balance of the transparent liquid in the upper and lower cavities 4 and ensure that the elastic membrane 5 can be stably deformed. In this embodiment, under the action of the upper piston assembly and the lower piston assembly, the upper cavity 3 and the lower cavity 4 in the housing 1 are both sealing structures.

Referring to fig. 1-2, the upper variable pressure adjusting mechanism and the lower variable pressure adjusting mechanism are both hydraulic transmission mechanisms. Specifically, the hydraulic cylinder can be used as an upper variable pressure adjusting mechanism and a lower variable pressure adjusting mechanism, so that the stability and the sensitivity of the pressure change of the transparent liquid in the upper cavity 3 and the lower cavity 4 are improved, the instantaneous change of the elastic film 5 is realized in the using process, the use experience is improved, the delay effect is prevented from being generated, and the imaging is influenced. Of course, the upper variable pressure adjusting mechanism and the lower variable pressure adjusting mechanism in the embodiment may also adopt other external pressure devices, such as a supercharger.

Referring to fig. 1-2, the transparent liquid in the upper chamber 3 has a different refractive index than the transparent liquid in the lower chamber 4. Of course, transparent liquid with the same refractive index can be filled in the upper cavity 3 and the lower cavity 4; wherein, under the sealing action of the elastic film 5, the upper cavity 3 and the lower cavity 4 are effectively sealed and separated; in addition, other transparent liquids which are mutually incompatible can be adopted in the upper cavity 3 and the lower cavity 4.

Referring to fig. 1-2, the working principle of the variable focus microlens based on hydraulic control of the present embodiment is:

the variable-focus micro lens based on hydraulic control is arranged on corresponding detection equipment; when the focal length needs to be adjusted and the imaging effect is changed, a user can change the curvature radius of the elastic membrane 5 in the shell 1 through the upper variable pressure adjusting mechanism or the lower variable pressure adjusting mechanism. Specifically, for example: the pressure of the transparent liquid in the upper cavity 3 is increased by a user through the upper variable pressure adjusting mechanism, so that the pressure intensity in the upper cavity 3 is larger than that of the lower cavity 4, and a hydraulic pressure difference is formed between the transparent liquid in the upper cavity 3 and the transparent liquid in the lower cavity 4, so that the upward bending radius of the elastic film 5 is reduced, the curvature radius book of the elastic film 5 is instantly changed, the focusing imaging of light is instantly changed, and the requirements of the user are met; when the pressure in the upper cavity 3 is increased by the upper variable pressure adjusting mechanism, because the elastic film 5 deforms, a certain pressure is generated on the transparent liquid in the lower cavity 4, so that the lower variable pressure adjusting mechanism can also adjust itself (namely, the lower piston 10 and the lower slider 9 move rightwards in the embodiment) under the action of the transparent liquid in the lower cavity 4, and the transparent liquid in the upper cavity 3 and the transparent liquid in the lower cavity 4 are kept balanced.

Example 2

The difference between the present embodiment and embodiment 1 is that the upper variable pressure adjusting mechanism includes a push-pull button disposed in the upper microfluidic channel 8 and located outside the upper slider 6; the push-pull button and the inner wall of the upper microflow channel 8 are fixed in position through a locking structure. Through the setting of push-and-pull button, the user can be directly through promoting push-and-pull button or pull out push-and-pull button when adjusting elastic sheet's curvature radius, impels slider 6 to move toward interior or toward outer to the pressure of transparent liquid in the cavity 3 in the change, and then realizes elastic film 5's curvature radius change, convenient operation, and simple structure.

The lower variable pressure regulating mechanism comprises an elastic element which is arranged between the lower sliding block 9 and the lower microfluidic channel 11. Through the arrangement of the elastic element, when zooming is carried out through the upper variable pressure adjusting mechanism, the lower sliding block 9 and the lower piston 10 automatically move under the action of the transparent liquid of the lower cavity 4, the structure is simple, and the whole micro-lens is simpler. In this embodiment, the elastic element is a spring.

The locking structure between the push-pull button and the upper microflow channel 8 is a thread structure. The position of the push-pull button is fixed by adopting a thread structure, the structure is simple, and the operation is convenient; the push-pull button can be screwed inwards or outwards by a user through forward and reverse screwing, so that the upper sliding block 6 and the upper piston 7 are driven to move left and right, the pressure of the transparent liquid in the upper cavity 3 is changed, and the radius of the elastic film 5 is adjusted.

In this embodiment, the lower variable voltage adjustment mechanism may also be a push-pull button, and the upper variable voltage adjustment mechanism may be an elastic element, which can also achieve the above-mentioned effects.

Example 3

The difference between the present embodiment and embodiment 2 is that the variable-pressure-down adjustment mechanism is a hydraulic transmission mechanism. Specifically, the lower variable pressure adjusting mechanism is a hydraulic cylinder. Adopt pneumatic cylinder and push-and-pull button cooperation for when zooming the formation of image adjustment through push-and-pull button, transparent liquid in the lower cavity 4 can take effect to the pneumatic cylinder in the twinkling of an eye, thereby makes elastic film 5 change at once, improves and uses experience.

Example 4

The difference between the embodiment and the embodiment 1 is that a plurality of upper microfluidic channels 8 are communicated through a first hose, and an upper variable pressure regulating mechanism is connected with the first hose; the lower micro-flow channels 11 are communicated through a second hose, and the lower variable pressure adjusting structure is connected with the second hose. Like this, under the condition that is equipped with many last miniflow passageway 8 and lower miniflow passageway 11, through the switch-on of first hose and second hose for when last vary voltage regulation structure or vary voltage regulation structure carry out pressure regulation down, make all go up the piston assembly on miniflow passageway 8 or the miniflow passageway 11 and can the synchronous motion, thereby realize the even atress of transparent liquid in the cavity, and then realize elastic film 5's instantaneous synchronous deformation, realize the imaging effect that zooms of quick high accuracy. Of course, the first hose or the second hose may also adopt the push-pull button of embodiment 2 as the variable pressure adjustment mechanism.

The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.