Collimator device for testing night vision device

Abstract

The utility model relates to the field of instrument measurement, in particular to a collimator device for testing a night vision device. The collimator comprises an objective lens base, one end of the objective lens base is provided with a target plate, four ends of the bottom end of the objective lens base are provided with objective lens base leveling footstands, the top end of the objective lens base is slidably connected with a collimator objective lens assembly, and the collimator objective lens assembly comprises an objective lens base platform, an optical objective barrel, a two-meter collimator lens, a lens backing ring and a lens locking ring. The two sides of the top end of the objective lens base are slidably connected with objective lens base platforms. The top ends of the objective lens base platforms are fixedly provided with optical objective lens barrels. According to the collimator device used for night vision device testing, the collimator objective assembly drives the scale needle and the graduated scale to carry out scale calculation according to the sliding distance, and then the hand-screwing locking nut is rotated to drive the non-slip mat to position the objective lens base platform, so that the stability of the collimator objective assembly is improved; and the test accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of instrument measurement, and in particular to a collimator device for testing night vision devices. Background Technology

[0002] A collimator is a precision angle measuring instrument consisting of a collimator and a telescope. With technological advancements, based on different angle measuring principles, collimators can be classified into optical collimators, laser collimators, and autocollimators, which structurally integrate the collimator and telescope.

[0003] When using the above technology, the following technical problems were found in the existing technology: the existing technology adjusts the collimating objective lens assembly according to the distance of the target plate, but the existing technology is not convenient for precise sliding adjustment of the collimating objective lens assembly. Moreover, after the collimating objective lens assembly is adjusted to a suitable and accurate position, it is necessary to position the collimating objective lens assembly to prevent errors in the collimator during testing. To this end, we designed a collimator device for night vision device testing to provide another technical solution to the above technical problems. Utility Model Content

[0004] Based on this, it is necessary to provide a collimator device for testing night vision devices to address the aforementioned technical problems. The target plate is placed at the focal plane of the collimating objective lens assembly, and then a light source with the required illumination is applied to the target plate. The collimating objective lens assembly is then slid to adjust the two-meter collimating lens according to the distance to the target plate. Each monocular of the binocular night vision device is focused to the clearest state, and the resolvable target pattern group number is recorded. The corresponding resolution value is obtained by looking up a table or by calculation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A collimator device for testing night vision devices includes an objective lens base. A target plate is provided at one end of the objective lens base. Leveling feet are mounted at all four ends of the bottom of the objective lens base. A collimating objective lens assembly is slidably connected to the top of the objective lens base. The collimating objective lens assembly includes an objective lens base platform, an optical objective lens tube, a two-meter collimating lens, a lens gasket ring, and a lens locking ring. The objective lens base platform is slidably connected to both sides of the top of the objective lens base. The optical objective lens tube is fixed to the top of the objective lens base platform. A two-meter collimating lens is mounted inside the optical objective lens tube. An adjustment mechanism for accurately positioning the collimating objective lens assembly is provided at the top of the objective lens base.

[0007] As a preferred embodiment of the collimator device for night vision device testing provided by this utility model, the adjustment mechanism includes an optical motorized guide rail and a guide rail limiting block. Optical motorized guide rails are fixed on both sides of the top of the objective lens base, and guide rail limiting blocks are fixed at both ends of the optical motorized guide rails. The top of the optical motorized guide rail is slidably connected to the collimating objective lens assembly.

[0008] In a preferred embodiment of the collimator device for testing night vision devices provided by this utility model, a scale needle is fixed to the bottom end of one side of the objective lens base platform, and a scale ruler is fixed to one side of the top end of the objective lens base, with the bottom end of the scale needle slidably connected to the scale ruler.

[0009] As a preferred embodiment of the collimator device for night vision device testing provided by this utility model, a hand-tightening locking nut is threaded to one end of the bottom of the objective lens base platform, and an anti-slip pad is fixed to the bottom of the hand-tightening locking nut.

[0010] In a preferred embodiment of the collimator device for night vision device testing provided by this utility model, a lens gasket is fixed to the inner side of the optical objective lens tube, the inner side of the lens gasket is slidably connected to the two-meter collimating lens, and a lens locking ring is fixed to one end of the optical objective lens tube, the inner side of the lens locking ring is engaged with the two-meter collimating lens.

[0011] As a preferred embodiment of the collimator device for night vision device testing provided by this utility model, the two ends of the optical objective lens tube are respectively slidably connected with a collimating objective lens rear cover and a collimating objective lens front cover.

[0012] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0013] At the same time, through the above technical solutions, this utility model has at least the following beneficial effects:

[0014] This invention provides a collimator device for testing night vision devices. The collimating objective lens assembly is adjusted according to the distance tested on the target plate. This, in turn, activates an optical motorized guide rail to move the objective lens base platform within a range. The objective lens base platform then moves the optical objective lens barrel and the two-meter collimating lens to reset and adjust. The objective lens base platform then moves a scale needle and ruler to calculate the scale based on the sliding distance. Finally, rotating the hand-tightened locking nut moves the anti-slip pad to position the objective lens base platform, thereby improving the stability of the collimating objective lens assembly and increasing the accuracy of the test. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure between the objective lens base and the collimating objective lens assembly of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the collimating objective lens assembly of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the optical objective lens tube of this utility model.

[0020] In the diagram: 1-Objective base, 2-Collimating objective assembly, 3-Optical guide rail, 4-Objective base leveling feet, 6-Collimating objective front cover, 7-Collimating objective rear cover, 8-Hand-tightening locking nut, 9-, 10-Scale needle, 11-Scale ruler, 201-Objective base platform, 202-Optical objective tube, 203-Two-meter collimating lens, 204-Lens gasket ring, 205-Lens locking ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] Please refer to Figures 1-4A collimator device for testing night vision devices includes an objective lens base 1 and a target plate 21. A collimating objective lens assembly 2 is slidably connected to the top of the objective lens base 1. The collimating objective lens assembly 2 includes an objective lens base platform 201, an optical objective lens tube 202, a two-meter collimating lens 203, a lens pad ring 204, and a lens locking ring 205. The objective lens base platform 201 is slidably connected to both sides of the top of the objective lens base 1. The optical objective lens tube 202 is fixed to the top of the objective lens base platform 201. The two-meter collimating lens 203 is assembled inside the optical objective lens tube 202. An adjustment mechanism for accurately positioning the collimating objective lens assembly 2 is provided at the top of the objective lens base 1.

[0026] In use, the target plate 21 is placed at the focal plane of the collimating objective lens assembly 2, and then the target plate 21 is illuminated with the light source of the required intensity. Then, the collimating objective lens assembly 2 is slid to drive the two-meter collimating lens 203 to adjust according to the distance of the target plate 21. Each monocular of the binocular night vision device is focused to the clearest state, and the resolution target pattern group number that can be distinguished is recorded. The corresponding resolution value is obtained by looking up a table or by calculation.

[0027] The adjustment mechanism includes an optical motorized guide rail 3 and a guide rail limiting block 9. Optical motorized guide rail 3 is fixed on both sides of the top of the objective lens base 1. Guide rail limiting blocks 9 are fixed at both ends of the optical motorized guide rail 3. The top of the optical motorized guide rail 3 is slidably connected to the collimating objective lens assembly 2. The collimating objective lens assembly 2 is driven to reciprocate by starting the optical motorized guide rail 3.

[0028] A scale needle 10 is fixed to the bottom of one side of the objective lens base platform 201, and a scale ruler 11 is fixed to one side of the top of the objective lens base 1. The bottom of the scale needle 10 is slidably connected to the scale ruler 11. A hand-tightening locking nut 8 is threaded to one end of the bottom of the objective lens base platform 201, and an anti-slip pad is fixed to the bottom of the hand-tightening locking nut 8.

[0029] When the collimating objective lens assembly 2 is adjusted according to the test distance, the objective lens base platform 201 drives the scale needle 10 and the scale ruler 11 to make scale markings. Then, by rotating the hand-tightened locking nut 8, the anti-slip pad is driven to position the objective lens base platform 201.

[0030] A lens gasket 204 is fixed to the inner side of the optical objective lens tube 202. The inner side of the lens gasket 204 is slidably connected to the two-meter collimating lens 203. A lens locking ring 205 is fixed to one end of the optical objective lens tube 202. The inner side of the lens locking ring 205 is engaged with the two-meter collimating lens 203. The two-meter collimating lens 203 is fixed and limited by the lens locking ring 205 and the lens gasket 204.

[0031] The two ends of the optical objective lens tube 202 are respectively slidably connected to the collimating objective lens rear cover 7 and the collimating objective lens front cover 6, so as to protect the two-meter collimating lens 203;

[0032] When optical axis parallelism testing is required, place the night vision device at the collimating objective lens exit port, place the crosshair target at the focal plane of the collimating objective lens assembly, adjust the low-light night vision device so that the crosshair pattern is roughly in the center of the low-light night vision device image, place a binocular front-viewing lens at the exit pupil of the low-light night vision device, align the crosshair of one eye of the front-viewing lens with the center of the crosshair target formed by the eyepieces of the binocular front-viewing lens, observe the crosshair target pattern of the other eye of the low-light night vision device through the other eye of the binocular front-viewing lens, and read the horizontal and vertical deviation values ​​between the crosshair target pattern and the center of the crosshair of the binocular front-viewing lens. This value is the optical axis parallelism value of the low-light night vision device.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A collimator device for testing night vision devices, characterized in that, The objective lens assembly includes an objective lens base (1), one end of which is provided with a target plate (21). The four ends of the bottom of the objective lens base (1) are equipped with objective lens base leveling feet (4). The top of the objective lens base (1) is slidably connected to a collimating objective lens assembly (2). The collimating objective lens assembly (2) includes an objective lens base platform (201), an optical objective lens tube (202), a two-meter collimating lens (203), a lens gasket ring (204), and a lens locking ring (205). The objective lens base platform (201) is slidably connected to both sides of the top of the objective lens base (1). The top of the objective lens base platform (201) is fixed with an optical objective lens tube (202). The inner side of the optical objective lens tube (202) is equipped with a two-meter collimating lens (203). The top of the objective lens base (1) is provided with an adjustment mechanism for accurately positioning the collimating objective lens assembly (2).

2. The collimator device for testing night vision devices according to claim 1, characterized in that, The adjustment mechanism includes an optical motor guide rail (3) and a guide rail limiting block (9). The optical motor guide rail (3) is fixed on both sides of the top of the objective lens base (1). The guide rail limiting block (9) is fixed at both ends of the optical motor guide rail (3). The top of the optical motor guide rail (3) is slidably connected to the collimating objective lens assembly (2).

3. The collimator device for testing night vision devices according to claim 2, characterized in that, A scale needle (10) is fixed to the bottom of one side of the objective lens base platform (201), and a scale ruler (11) is fixed to one side of the top of the objective lens base (1). The bottom of the scale needle (10) is slidably connected to the scale ruler (11).

4. A collimator device for testing night vision devices according to claim 2, characterized in that, One end of the objective lens base platform (201) is threaded with a hand-tightening locking nut (8), and the bottom end of the hand-tightening locking nut (8) is fixed with an anti-slip pad.

5. A collimator device for testing night vision devices according to claim 3, characterized in that, A lens gasket (204) is fixed to the inner side of the optical objective lens tube (202). The inner side of the lens gasket (204) is slidably connected to the two-meter collimating lens (203). A lens locking ring (205) is fixed to one end of the optical objective lens tube (202). The inner side of the lens locking ring (205) is engaged with the two-meter collimating lens (203).

6. A collimator device for testing night vision devices according to claim 2, characterized in that, The collimating objective lens tube (202) is slidably connected to the collimating objective lens rear cover (7) and the collimating objective lens front cover (6) at both ends.

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