Lens device

Abstract

The utility model discloses a lens device, and relates to the technical field of optical devices. The lens device comprises a lens base body, a lens gland and an elastic film. A first separation part is arranged on the lens base body; a second separation part corresponding to the first separation part is arranged on the lens gland; the peripheral elastic part of the elastic film is pressed between the lens base body and the lens gland, and the middle elastic part is pressed between the first partition part and the second partition part. A refractive deformation space is formed between the middle elastic part and the first partition part, a deformation buffer space is formed between the middle elastic part and the second partition part, a driving space is formed between the peripheral elastic part and the lens gland, a liquid supply space is formed between the peripheral elastic part and the lens base body, and the driving space is used for being communicated with an air pressure control device. The liquid supply space communicates with the refractive deformation space and is filled with a refractive liquid medium. According to the utility model, the position of the refractive liquid medium is changed by adjusting the air pressure change in the driving space through the air pressure control device, so that the refractive deformation space can simulate lens focusing.

Description

Technical Field

[0001] The utility model relates to the technical field of optical devices, and more specifically, to a lens device. Background Art

[0002] The lens device of the prior art realizes continuous zoom by moving the position of the lens group, but this design has some disadvantages:

[0003] (1) Complex structure: Mechanical zoom requires a sophisticated mechanical structure and drive system, which increases design difficulty and manufacturing cost.

[0004] (2) Large size and weight: In order to achieve a larger zoom range, the lens group may require a larger space and heavier optical components, which is not conducive to the lightweight design of portable devices.

[0005] (3) Slow response speed: Mechanical zoom has a slow response speed and is not suitable for quickly capturing dynamic scenes.

[0006] (4) Frequent maintenance and poor durability: Mechanical moving parts are susceptible to wear and damage and require more frequent maintenance and replacement.

[0007] (5) Higher cost: High-quality zoom lenses are usually more expensive, which may increase the overall cost of the equipment.

[0008] Therefore, how to achieve low-cost continuous zooming of a lens device has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0009] In view of this, an object of the present invention is to provide a lens device to achieve low-cost continuous zooming of the lens device.

[0010] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0011] A lens device, comprising:

[0012] A lens substrate is provided with a first partition;

[0013] A lens gland, connected to the lens base and provided with a second partition corresponding to the first partition;

[0014] An elastic film, comprising an outer peripheral elastic portion and an intermediate elastic portion arranged in the middle of the outer peripheral elastic portion, wherein the outer peripheral elastic portion is pressed between the lens base and the lens gland, and the intermediate elastic portion is pressed between the first partition and the second partition;

[0015] Among them, a refractive deformation space is formed between the intermediate elastic part and the first partition, a deformation buffer space is formed between the intermediate elastic part and the second partition, a driving space is formed between the peripheral elastic part and the lens pressure cover, and a liquid supply space is formed between the peripheral elastic part and the lens base, the driving space is used to be connected with the air pressure control device, and the liquid supply space is connected with the refractive deformation space and is filled with a refractive liquid medium.

[0016] Optionally, in the above-mentioned lens device, when the air pressure control device applies pressure to the driving space, the peripheral elastic portion is deformed, and the refractive liquid medium in the liquid supply space is squeezed into the refractive deformation space, so that the middle elastic portion is convexly deformed in the direction where the second partition portion is located;

[0017] When the air pressure control device releases the pressure in the driving space, the peripheral elastic portion of the elastic film is deformed, the refractive liquid medium enters the liquid supply space from the refractive deformation space, and the middle elastic portion convexly deforms toward the direction where the first partition is located.

[0018] Optionally, in the above lens device, a first glass plane mirror corresponding to the position of the middle elastic portion is arranged on the lens substrate, and the first glass plane mirror, the first partition portion and the middle elastic portion together enclose the refractive deformation space;

[0019] The lens cover is provided with a second glass plane mirror corresponding to the position of the middle elastic part, and the second glass plane mirror, the second partition part and the middle elastic part together form the deformation buffer space.

[0020] Optionally, in the above-mentioned lens device, a plurality of stepped positioning steps are provided on the inner wall of the second partition, and the second glass plane mirror is used to be arranged on different of the positioning steps to adjust the size of the deformation buffer space.

[0021] Optionally, in the above-mentioned lens device, a plurality of connecting grooves are evenly arranged around the circumference of the first partition, and the connecting grooves connect the liquid supply space and the refractive deformation space.

[0022] Optionally, in the above-mentioned lens device, a first air channel and a second air channel are respectively provided on the sides where the lens base and the lens cover are bonded to each other, the positions of the first air channel and the second air channel correspond to each other, and are used to connect the driving space and the air pressure control device.

[0023] Optionally, in the above-mentioned lens device, the refractive liquid medium is a transparent liquid, and the middle elastic part is a light-transmitting material.

[0024] Optionally, in the above-mentioned lens device, the middle elastic portion is circular, and the peripheral elastic portion is annular.

[0025] Optionally, in the above-mentioned lens device, one of the lens base and the lens cover is provided with a positioning protrusion, and the other is provided with a positioning hole for the positioning protrusion to be embedded.

[0026] Optionally, in the above-mentioned lens device, the air pressure control device is an air pump, and the air pump is connected to the lens base through a bracket.

[0027] The lens device provided by the utility model comprises a lens base, a lens pressure cover and an elastic film. A first partition is arranged on the lens base; the lens pressure cover is connected to the lens base and is provided with a second partition corresponding to the first partition; the elastic film comprises a peripheral elastic part and an intermediate elastic part arranged in the middle of the peripheral elastic part, the peripheral elastic part is pressed between the lens base and the lens pressure cover, and the intermediate elastic part is pressed between the first partition and the second partition. A refractive deformation space is formed between the intermediate elastic part of the elastic film and the first partition, and a deformation buffer space is formed between the intermediate elastic part of the elastic film and the second partition, a driving space is formed between the peripheral elastic part of the elastic film and the lens pressure cover, and a liquid supply space is formed between the peripheral elastic part of the elastic film and the lens base, the driving space is used to communicate with the air pressure control device, and the liquid supply space is connected with the refractive deformation space and is filled with a refractive liquid medium.

[0028] Compared with the prior art, the lens device provided by the utility model imitates the principle of focusing of the eye lens, and changes the position of the refractive liquid medium by adjusting the air pressure change of the air medium in the driving space through the air pressure control device, so that the middle elastic part of the elastic film can be deformed in different directions to achieve a deformation effect similar to that of the lens. The utility model can be applied to a variety of applications such as human eye vision training, assisting industrial lenses to quickly focus on objects, and providing depth of field information for camera modeling. It has the advantages of simple structure, continuous zoom, small size, convenient electrical control, and fast adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A cross-sectional view of a lens device disclosed in an embodiment of the utility model;

[0031] Figure 2It is a schematic diagram of the principle of the first adapting portion and the middle elastic portion of the lens device disclosed in the embodiment of the utility model;

[0032] Figure 3 An exploded view of the lens device disclosed in the embodiment of the utility model;

[0033] Figure 4 The structure of the lens substrate disclosed in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0034] Figure 5 The structure of the lens substrate disclosed in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0035] Figure 6 The structure of the lens cover disclosed in the embodiment of the utility model is schematically shown. Figure 1 ;

[0036] Figure 7 The structure of the lens cover disclosed in the embodiment of the utility model is schematically shown. Figure 2 ;

[0037] Figure 8 It is a schematic diagram of the structure of the lens film disclosed in the embodiment of the utility model;

[0038] Fig. 9 It is a structural schematic diagram of a first glass plane mirror disclosed in an embodiment of the utility model;

[0039] Fig.10 Schematic diagram of the installation structure of the bracket and the air pressure control device disclosed in the embodiment of the utility model Figure 1 ;

[0040] Fig.11 Schematic diagram of the installation structure of the bracket and the air pressure control device disclosed in the embodiment of the utility model Figure 2 ;

[0041] Fig.12 This is a diagram of a continuous zoom experimental platform for the lens device disclosed in an embodiment of the utility model.

[0042] Wherein, 10 is an optical electron microscope, 11 is an adapter ring, 12 is a sample of an object to be photographed, and 13 is a fixed platform;

[0043] 100 is a lens base, 101 is a refractive deformation space, 102 is a liquid supply space, 110 is a first partition, 111 is a connecting groove, and 112 is a first air channel;

[0044] 200 is a lens pressure cover, 201 is a deformation buffer space, 202 is a driving space, 203 is an air supply hole, 210 is a second partition, 211 is a positioning step, and 212 is a second air channel;

[0045] 300 is an elastic film, 310 is a middle elastic portion, and 320 is a peripheral elastic portion;

[0046] 400 is an air pressure control device, and 410 is a bracket;

[0047] 500 is a second glass plane mirror;

[0048] 600 is a first glass plane mirror. DETAILED DESCRIPTION

[0049] The core of the utility model is to disclose a lens device to realize low-cost continuous zooming of the lens device.

[0050] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary as solutions of the utility model described in the claims. It should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. In the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0051] Combination Figure 1-Figure 11 The lens device disclosed in the utility model comprises a lens base 100, a lens pressure cover 200 and an elastic film 300. A first partition 110 is provided on the lens base 100; the lens pressure cover 200 is connected to the lens base 100 and is provided with a second partition 210 corresponding to the first partition 110; the elastic film 300 comprises an outer peripheral elastic part 320 and an intermediate elastic part 310 provided in the middle of the outer peripheral elastic part 320, the outer peripheral elastic part 320 is pressed between the lens base 100 and the lens pressure cover 200, and the intermediate elastic part 310 is pressed between the first partition 110 and the second partition 210. Among them, a refractive deformation space 101 is formed between the middle elastic part 310 of the elastic film 300 and the first partition part 110, and a deformation buffer space 201 is formed between the middle elastic part 310 and the second partition part 210. A driving space 202 is formed between the peripheral elastic part 320 of the elastic film 300 and the lens pressure cover 200, and a liquid supply space 102 is formed between the peripheral elastic part 320 of the elastic film 300 and the lens base 100. The driving space 202 is used to communicate with the air pressure control device 400, and the liquid supply space 102 is connected to the refractive deformation space 101 and is filled with a refractive liquid medium.

[0052] The deformation buffer space 201 and the driving space 202 are filled with air medium, and the refractive liquid medium uses a highly transparent liquid to simulate the lens as a refractive body. The air in the deformation buffer space 201 serves as a buffer medium for the deformation of the middle elastic part 310 of the elastic film 300, and the air in the driving space 202 serves as an air pressure medium for the deformation of the peripheral elastic part 320 of the driving elastic film 300.

[0053] When the air pressure control device 400 applies pressure to the driving space 202, the outer elastic part 320 of the elastic film 300 is deformed, and the refractive liquid medium in the liquid supply space 102 is squeezed into the refractive deformation space 101, so that the middle elastic part 310 of the elastic film 300 is convexly deformed in the direction where the second partition 210 is located; when the air pressure control device 400 releases the pressure in the driving space 202, the outer elastic part 320 of the elastic film 300 is deformed, (part of) the refractive liquid medium enters the liquid supply space 102 from the refractive deformation space 101, and the middle elastic part 310 of the elastic film 300 is convexly deformed in the direction where the first partition 110 is located. That is, the air pressure control device 400 generates a pressure difference between the liquid supply space 102 and the driving space 202, thereby squeezing the refractive liquid medium to force the refractive liquid medium and the elastic film 300 to deform together, and produce a refractive effect similar to a concave-convex lens.

[0054] Compared with the prior art, the lens device disclosed in the embodiment of the utility model imitates the principle of focusing of the eye lens, and drives the air pressure change of the air medium through the air pressure control device 400 to change the position of the refractive liquid medium, so that the middle elastic part 310 of the elastic film 300 can be deformed in different directions to achieve a deformation effect similar to that of the lens. The utility model can be applied to a variety of applications such as human eye vision training, assisting industrial lenses to quickly focus on objects, and providing depth of field information for camera modeling. It has the advantages of simple structure, continuous zoom, small size, convenient electrical control, and fast adjustment.

[0055] The lens base 100 and the lens cover 200 (including the first partition 110 and the second partition 210) are both rigid components. The elastic film 300 is made of elastic material so as to be able to confine the refractive liquid medium in the liquid supply space 102 and the refractive deformation space 101 and provide a restoring force. The middle elastic part 310 is made of a light-transmitting material and can produce a light-transmitting effect to ensure the refraction effect of light in the refractive deformation space 101.

[0056] Combination Figure 4 and Figure 5 The first partition 110 is convexly disposed on the lens substrate 100. When the lens film is pressed between the lens substrate 100 and the lens pressure cover 200, the liquid supply space 102 is a ring structure with a triangular cross-section.

[0057] Specifically, the air pressure control device 400 may be an air pump, preferably a micro air pump, and the air pump may be connected to the lens base 100 via a bracket 410 .

[0058] Combination Figure 1 An air supply hole 203 connected to the air pressure control device 400 is provided on the outer wall of the lens pressure cover 200, and a first air channel 112 and a second air channel 212 are respectively provided on the side surfaces where the lens base 100 and the lens pressure cover 200 are in contact with each other. The positions of the first air channel 112 and the second air channel 212 correspond to each other and are connected to the driving space 202 (air supply hole 203) and the air pressure control device 400.

[0059] A first glass plane mirror 600 corresponding to the position of the middle elastic portion 310 of the elastic film 300 is arranged on the lens base 100, and the first glass plane mirror 600, the first partition 110 and the middle elastic portion 310 of the elastic film 300 together form a refractive deformation space 101; a second glass plane mirror 500 corresponding to the position of the middle elastic portion 310 of the elastic film 300 is arranged on the lens pressure cover 200, and the second glass plane mirror 500, the second partition 210 and the middle elastic portion 310 of the elastic film 300 together form a deformation buffer space 201.

[0060] The first glass plane mirror 600 and the second glass plane mirror 500 are both light-transmissive, and can protect the elastic film 300 from damage without affecting imaging.

[0061] Combination Figure 1 and Figure 6 A plurality of stepped positioning steps 211 are provided on the inner wall of the second partition 210. Different positioning steps 211 can be used to install second glass plane mirrors 500 of different sizes, and adjust the distance between the second glass plane mirror 500 and the elastic film 300, adjust the size of the deformation buffer space 201, and further adjust the size of the air pressure in the deformation buffer space 201, so as to facilitate the diopter calibration of the lens device.

[0062] In order to achieve free flow of the refractive liquid medium between the liquid supply space 102 and the refractive deformation space 101 , a plurality of connecting grooves 111 are evenly opened in the circumferential direction of the first partition 110 , and the connecting grooves 111 connect the liquid supply space 102 and the refractive deformation space 101 .

[0063] The lens base 100 and the lens cover 200 jointly constrain the shape of the elastic film 300. Figure 8 The middle elastic portion 310 of the elastic film 300 is preferably circular, and the peripheral elastic portion 320 is annular, so as to ensure the consistency of deformation of the elastic film 300 at various locations when subjected to force, and to ensure that the deformation of the middle elastic portion 310 can simulate the hemispherical change of the lens.

[0064] Correspondingly, the first partition 110 and the second partition 210 are cylindrical in shape as a whole.

[0065] In order to facilitate the connection between the lens gland 200 and the lens base 100, one of the lens base 100 and the lens gland 200 is provided with a positioning protrusion, and the other is provided with a positioning hole for the positioning protrusion to be embedded. The lens gland 200 and the lens base 100 can be connected by bolts / screws, and the elastic film 300 can be used as a seal to prevent the refractive liquid medium from flowing out of the liquid supply space 102 and the refractive deformation space 101.

[0066] A specific zoom operation process of the utility model is as follows: the electrically controlled air pump draws air into the driving space 202, the air in the driving space 202 compresses the peripheral elastic portion 320 of the elastic film 300, and squeezes the refractive liquid medium in the liquid supply space 102 to overflow into the refractive deformation space 101, and the increase of the refractive liquid medium in the refractive deformation space 101 causes the middle elastic portion 310 of the elastic film 300 to expand into the deformation buffer space 201, forming a convex lens.

[0067] After the driving space 202 is deflated, the refractive liquid medium in the liquid supply space 102 is reset under the elastic action of the middle elastic portion 310 .

[0068] The electrically controlled air pump draws air, driving the air pressure in the space 202 and the liquid supply space 102 to be unbalanced, causing the refractive liquid medium to flow from the refractive deformation space 101 to the liquid supply space 102, and the middle elastic portion 310 is recessed toward the first partition 110 to form a concave lens. Different diopters can be achieved by controlling the air pressure of the air pump through the host computer, and the purpose of rapid focusing can be achieved by changing the diopters of the lens device.

[0069] The lens device disclosed in the embodiment of the utility model has multiple applications: (1) Vision training. The utility model is installed in a bracket suitable for the head. The diopter of the lens device is controlled by software to change slowly. When the human eye observes objects through the lens device, it will be forced to adapt to different degrees of myopia or hyperopia. After a period of cycle, it plays a role in training the ciliary muscle. (2) Assisting camera focus. Some industrial cameras need to focus on objects at different distances. The use of the utility model can replace the traditional bulky optical lens and realize the fast focus of a smaller lens device. (3) Structural modeling. After calibration, the utility model can give the diopter of the current lens according to the focus position after visual adjustment, and then reversely calculate the structural depth information.

[0070] The following is an application scenario of the utility model for continuous focusing experiment.

[0071] Experimental purpose: To prove whether the focusing function of the lens device of the utility model is effective.

[0072] Experimental method: The sample is placed under an optical electron microscope 10 by the utility model, the lens of the instrument is fixed to a certain focus and no longer adjusted, and the diopter of the utility model is adjusted to shoot scenes at different depths.

[0073] Experimental protocol:

[0074] To prepare the photographed object sample 12, a column of letters is printed on A4 paper, which is then cut and folded into a right triangle so that the side with the letters serves as the long inclined surface and faces the upper lens.

[0075] Make an adapter ring 11 to fix the utility model on the optical electron microscope 10, adjust the ambient light source to a suitable brightness, adjust the optical electron microscope 10 to focus the camera image on the letter "M", at which time other letters are blurred, and then fix the instrument lens without further adjustment.

[0076] The initial diopter of the utility model is 0. The lens device is controlled by the host computer to gradually adjust the camera focus, and the clear images from "A" to "Z" and the corresponding lens parameters are recorded in sequence.

[0077] After the experiment, the experimental materials were sorted out.

[0078] Experimental platform:

[0079] Instrument: Zhiqi ZQ-601 optical electron microscope.

[0080] Components: optical electron microscope 10; adapter ring 11; object sample 12; fixed platform 13; lens device (combined Fig.12 , the lens device of the utility model is arranged on the adapter ring 11).

[0081] Experimental results: The clear images at each depth and the corresponding diopter parameters were recorded. The results are shown in Table 1 below.

[0082] Table 1 Experimental results

[0083]

[0084] The above experiments prove that the utility model can adjust the focus of the camera within the range of ±2.5D (diopters), and the focusing function is normal and in line with expectations.

[0085] The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. The specific technical means in some embodiments can be combined in part or in whole into another embodiment without being explicitly excluded by another embodiment. Therefore, the utility model will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A lens device, characterized in that: include: A lens base (100) is provided with a first partition (110); A lens pressure cover (200) connected to the lens base (100) and provided with a second partition (210) corresponding to the first partition (110); An elastic film (300), comprising an outer peripheral elastic portion (320) and an intermediate elastic portion (310) disposed at an intermediate position of the outer peripheral elastic portion (320), wherein the outer peripheral elastic portion (320) is pressed between the lens base (100) and the lens gland (200), and the intermediate elastic portion (310) is pressed between the first partition portion (110) and the second partition portion (210); A refractive deformation space (101) is formed between the intermediate elastic portion (310) and the first partition (110), and a deformation buffer space (201) is formed between the intermediate elastic portion (310) and the second partition (210); a driving space (202) is formed between the peripheral elastic portion (320) and the lens pressure cover (200), and a liquid supply space (102) is formed between the peripheral elastic portion (320) and the lens base (100); the driving space (202) is used to communicate with the air pressure control device (400); and the liquid supply space (102) is communicated with the refractive deformation space (101) and is filled with a refractive liquid medium.

2. The lens device according to claim 1, wherein: When the air pressure control device (400) applies pressure to the driving space (202), the peripheral elastic portion (320) is deformed, and the refractive liquid medium in the liquid supply space (102) is squeezed into the refractive deformation space (101), so that the middle elastic portion (310) is deformed to convexly move in the direction where the second partition portion (210) is located; When the air pressure control device (400) releases pressure in the driving space (202), the peripheral elastic portion (320) is deformed, the refractive liquid medium enters the liquid supply space (102) from the refractive deformation space (101), and the middle elastic portion (310) is deformed to convexly move in the direction where the first partition (110) is located.

3. The lens device according to claim 1, wherein: The lens base (100) is provided with a first glass plane mirror (600) corresponding to the position of the middle elastic portion (310); the first glass plane mirror (600), the first partition portion (110) and the middle elastic portion (310) together enclose the refractive deformation space (101); The lens pressure cover (200) is provided with a second glass plane mirror (500) corresponding to the position of the middle elastic portion (310); the second glass plane mirror (500), the second partition portion (210) and the middle elastic portion (310) together enclose the deformation buffer space (201).

4. The lens device according to claim 3, characterized in that A plurality of stepped positioning steps (211) are provided on the inner wall of the second partition (210), and the second glass plane mirror (500) is used to be arranged on different positioning steps (211) to adjust the size of the deformation buffer space (201).

5. The lens device according to claim 1, wherein: A plurality of connecting grooves (111) are evenly arranged in the circumferential direction of the first partition portion (110), and the connecting grooves (111) connect the liquid supply space (102) and the refractive deformation space (101).

6. The lens device according to claim 1, characterized in that A first air channel (112) and a second air channel (212) are respectively provided on the sides of the lens base (100) and the lens pressure cover (200) that are in contact with each other; the first air channel (112) and the second air channel (212) are located in corresponding positions and are used to connect the driving space (202) and the air pressure control device (400).

7. The lens device according to claim 1, characterized in that The refractive liquid medium is a transparent liquid, and the middle elastic portion (310) is made of a light-transmitting material.

8. The lens device according to claim 1, wherein: The middle elastic portion (310) is circular, and the peripheral elastic portion (320) is annular.

9. The lens device according to claim 1, wherein: One of the lens base (100) and the lens pressure cover (200) is provided with a positioning protrusion, and the other is provided with a positioning hole for the positioning protrusion to be embedded.

10. The lens device according to claim 1, wherein: The air pressure control device (400) is an air pump, and the air pump is connected to the lens base (100) via a bracket (410).

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