Detector for optical performance of handheld observation equipment

Abstract

The utility model discloses a handheld detector for observing the optical performance of equipment, which comprises an instrument body, and a first reticle and a second reticle are respectively arranged on two sides of the instrument body; eyepiece sleeves are symmetrically connected to the rear end of the instrument body, and eyepiece lenses are arranged in the eyepiece sleeves; the front end of the instrument body is symmetrically provided with connecting columns, the front ends of the connecting columns are respectively connected with a first objective lens barrel and a second objective lens barrel, and a first objective lens is fixedly connected in the first objective lens barrel; and a second object lens is slidably connected in the second objective lens barrel. The device can detect the optical performance of observation equipment, facilitates subsequent calibration, and is simple in structure, convenient to use and low in cost.

Description

Technical Field

[0001] This utility model relates to a handheld observation equipment optical performance testing instrument, belonging to the field of testing instrument technology. Background Technology

[0002] The accuracy of the optical performance of observation equipment directly affects the reliability and scientific validity of the test results. Deviations in optical performance will lead to distorted observation data, which in turn will affect analysis, judgment, and subsequent decision-making. High-precision optical performance is fundamental to ensuring the normal operation of the equipment and is also key to improving the quality of testing. Therefore, it is necessary to regularly calibrate the optical performance of the observation equipment to guarantee the reliability and scientific validity of the test results.

[0003] Within the military, the calibration and inspection capabilities of observation equipment lag significantly behind equipment development. This is manifested in two ways: firstly, the observation equipment suffers from a high failure rate and a low repair rate, indicating insufficient calibration and inspection capabilities within the military; secondly, some units, to avoid being held accountable for equipment damage, leave their observation equipment idle, resulting in ineffective equipment performance and compromised military training. The reasons for this can be broadly categorized into two aspects: firstly, conventional testing instruments are complex to operate, making them difficult for equipment repair personnel to learn and use; secondly, conventional testing instruments are expensive and prone to damage during testing, leading to greater losses. Utility Model Content

[0004] The purpose of this invention is to provide a handheld instrument for testing the optical performance of observation equipment. This invention can test the optical performance of observation equipment, facilitates subsequent calibration, has a simple structure, is easy to use, and is low in cost.

[0005] The technical solution of this utility model is as follows: A handheld observation equipment optical performance testing instrument includes an instrument body, on which a first reticle and a second reticle are respectively provided on both sides; an eyepiece tube is symmetrically connected to the rear end of the instrument body, and an eyepiece lens is provided inside the eyepiece tube; a connecting post is symmetrically provided at the front end of the instrument body, and a first objective lens tube and a second objective lens tube are respectively connected to the front end of the connecting post, and a first objective lens is fixedly connected inside the first objective lens tube; a second objective lens is slidably connected inside the second objective lens tube.

[0006] The aforementioned handheld observation equipment optical performance testing instrument has an eyepiece tube equipped with a distance adjustment knob, the movable end of which is fixedly connected to the eyepiece.

[0007] The aforementioned handheld observation equipment optical performance testing instrument has a connecting column that is screwed into the first objective lens tube and the second objective lens tube via threads.

[0008] The aforementioned handheld observation equipment optical performance testing instrument has a cross-shaped reticle on the first reticle, and inclination measurement reticles on both sides of the vertical line of the cross-shaped reticle; a first length reticle is provided on the horizontal line of the cross-shaped reticle; and a rectangular reticle for measuring the parallelism of the optical axis of the equipment is provided on the second reticle.

[0009] The aforementioned handheld observation equipment optical performance testing instrument includes a second objective lens tube comprising an outer tube and an inner tube, the inner tube being slidably connected to the outer tube; the second objective lens is fixedly disposed inside the inner tube; the outer tube is provided with a sliding groove; the inner tube is provided with a sliding rod, the sliding rod cooperating with the sliding groove and extending outward through the sliding groove; the outer tube is provided with a gradation groove located on the side of the sliding groove, the gradation groove containing gradation lines.

[0010] The aforementioned handheld observation equipment optical performance testing instrument also includes auxiliary accessories, which are threadedly connected to the outer end of the first objective lens tube and / or the outer end of the inner tube.

[0011] The aforementioned handheld observation equipment optical performance testing instrument includes auxiliary accessories such as a magnification objective lens, a mounting base, a calibration reticle, and a diopter aid lens.

[0012] The aforementioned handheld observation equipment optical performance testing instrument has a second length division engraved on the calibration reticle.

[0013] Compared with the prior art, this utility model has the following advantages: The connection between the first and second objective lens tubes and the instrument body is achieved by threaded engagement, which facilitates the installation of corresponding objective lenses according to testing requirements and also facilitates replacement after damage; the eyepiece tube can be moved back and forth by the distance adjustment knob, thereby achieving the effect of adjusting the diopter; the cross-shaped reticle on the first reticle is used to measure the image distortion of the equipment, the inclination reticle is used to measure the tilt of the first reticle, the first length reticle can measure the exit pupil diameter of the equipment, and the rectangular reticle on the second reticle is used to measure the parallelism of the optical axis of the equipment; the diopter value can be detected by sliding the inner tube within the outer tube by pushing the sliding rod; the exit pupil diameter and exit pupil distance of the equipment can be measured by installing the magnification objective lens; the diopter auxiliary lens is installed to expand the range of diopter inspection; the calibration reticle is installed to measure the visual magnification of the equipment; and the support is installed to prevent damage to the eyecup when it is in close contact with the equipment to be tested. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the rear structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the first reticle;

[0018] Figure 5 This is a schematic diagram of the second reticle.

[0019] The labels in the attached diagram are as follows: 1-instrument body, 2-first reticle, 3-second reticle, 4-eyepiece tube, 5-eyepiece lens, 6-connecting post, 7-first objective tube, 8-second objective tube, 9-first objective lens, 10-second objective lens, 11-distance adjustment knob, 12-first thread, 13-second thread, 14-third thread, 15-cross reticle, 16-inclinometer reticle, 17-first length reticle, 18-rectangular reticle 19-Outer cylinder, 20-Inner cylinder, 21-Slide groove, 22-Sliding rod, 23-Grating groove, 24-Grating line, 25-Auxiliary accessory, 26-Magnification objective lens, 27-Support, 28-Inspection reticle, 29-Diopter auxiliary lens, 30-Fourth thread, 31-Fifth thread, 32-Sixth thread, 33-Seventh thread, 34-Eighth thread, 35-Ninth thread, 36-Second length reticle, 37-Tenth thread. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0021] Example: A handheld observation equipment optical performance testing instrument, configured as follows Figure 1-5 As shown, the instrument includes an instrument body 1, with a first reticle 2 and a second reticle 3 respectively on both sides of the instrument body 1; an eyepiece tube 4 is symmetrically connected to the rear end of the instrument body 1, and an eyepiece lens 5 is connected inside the eyepiece tube; a connecting post 6 is symmetrically arranged at the front end of the instrument body 1, and a first objective lens tube 7 and a second objective lens tube 8 are respectively connected to the front end of the connecting post 6; a first objective lens 9 is fixedly connected inside the first objective lens tube 7; and a second objective lens 10 is slidably connected inside the second objective lens tube 8.

[0022] Preferably, such as Figure 2As shown, the eyepiece tube 4 is equipped with an adjustment knob 11, the movable end of which is fixedly connected to the eyepiece lens 5. The adjustment knob 11 is a conventional component, primarily converting rotational motion into linear motion by rotating an internal gear, screw, or threaded mechanism. In this embodiment, an eleventh thread is provided on the inner end face of the adjustment knob 11, and a twelfth thread is provided on the side of the eyepiece lens 5. The eyepiece lens 5 is slidably connected to the eyepiece tube 4 via a sliding block or similar mechanism, so that when the adjustment knob 11 is rotated, the engagement of the threads causes the eyepiece lens to move back and forth. The adjustment knob 11 is engraved with diopter lines ranging from -2SD to +2SD. Rotating the adjustment knob 11 causes the eyepiece lens 5 to move, thereby adjusting the diopter.

[0023] Preferably, such as Figure 2 As shown, the connecting post 6 has a first thread 12; the rear end of the first objective lens tube 7 has a second thread 13; and the rear end of the second objective lens tube 8 has a third thread 14. The first objective lens tube 7 and the second objective lens tube 8 are connected to the instrument body 1 by means of threaded engagement, which facilitates the selection of the appropriate objective lens as needed and the replacement of damaged parts.

[0024] Preferably, such as Figure 4 As shown, the first reticle 2 has a cross-shaped reticle 15, which is used to measure the tilt of the equipment. On both sides of the vertical line of the cross-shaped reticle 15 are inclinometer reticles 16, each with three divisions on each side, each division representing 1°, with a tilt range of -3° to +3°. The inclinometer reticles 16 are used to measure the tilt of the first reticle. On the horizontal line of the cross-shaped reticle 15 are first length reticles 17, each division of which is 0.1mm, which can measure the exit pupil diameter of the equipment, with a measurement range of 0 to 13mm. Figure 5 As shown, the second reticle 3 is engraved with rectangular divisions 18 for the optical axis tolerance. The rectangular divisions 18 are used to measure the parallelism of the optical axis of the equipment.

[0025] Preferably, such as Figure 2 and 3 As shown, the second objective lens tube 8 includes an outer tube 19 and an inner tube 20, which are slidably connected. The second objective lens 10 is fixedly disposed inside the inner tube 20. The outer tube 19 is provided with a sliding groove 21. The inner tube 20 is provided with a sliding rod 22, which cooperates with the sliding groove 21 and extends outward through the sliding groove 21. The outer tube 19 is provided with a gradation groove 23 located on the side of the sliding groove 21, and the gradation groove 23 is provided with reticle lines 24. The reticle lines 24 include two gradations: one with an "∞" symbol engraved in the middle, indicating that an infinity target is imaged on the reticle, with 8 divisions before and after the "∞", each division having a value of 0.25SD, for a total of ±2SD; the other gradation has a scale from 0 to 80mm, used to measure the exit pupil distance.

[0026] Preferably, such as Figure 1 and 2 As shown, it also includes auxiliary accessories 25; the auxiliary accessories 25 include a magnification objective lens 26, a support 27, a calibration reticle 28, and a diopter aid lens 29; the outer end of the inner cylinder 20 is provided with a fourth thread 30; the rear end of the magnification objective lens 26 is provided with a fifth thread 31, and the front end of the magnification objective lens 26 is provided with a sixth thread 32; the rear end of the support 27 is provided with a seventh thread 33; the rear end of the calibration reticle 28 is provided with an eighth thread 34; the rear end of the diopter aid lens 29 is provided with a ninth thread 35, and the diopter aid lens 29 is available in +4D and -4D specifications. The calibration reticle 28 is engraved with a second length division 36, which has 50 divisions, each 1mm, and is used in conjunction with the magnification objective lens 26 to measure the magnification of the equipment. The outer end of the first objective lens tube 7 is provided with a tenth thread 37, and the first objective lens tube 7 can also be connected to the auxiliary accessories 25 by means of a threaded connection.

[0027] The specific steps for measuring and observing whether the optical axes of the equipment are parallel are as follows:

[0028] 1. Screw the connecting post 6 on one side of the second reticle 3 onto the first objective lens tube 7;

[0029] 2. Align the objective lens of the equipment to be inspected with the corresponding collimator or a clear target point in the distance, and make the image point centered in the field of view;

[0030] 3. Adjust the distance adjustment knob 11 and see the second reticle 3 clearly through the eyepiece tube 4;

[0031] 4. Point the first objective lens tube 7 toward the eyepiece of the equipment under inspection, adjust the diopter of the equipment under inspection, and see the image point clearly through the eyepiece tube 4 on one side of the second reticle 3.

[0032] 5. Move the instrument body 1 appropriately so that the center of the crosshair of the second reticle 3 coincides with the image point. At this time, the image point in the eyepiece tube 4 should not exceed the rectangular reticle 18 of the optical axis allowable error.

[0033] The specific steps for measuring the visibility value of the observation equipment are as follows:

[0034] 1. Screw the connecting post 6 on one side of the first reticle 2 onto the second objective lens tube 8;

[0035] 2. Adjust the distance adjustment knob 11 to adjust the diopter of the eyepiece 5 so that the first reticle 2 line can be seen clearly;

[0036] 3. Place the second objective lens tube 8 behind the eyepiece of the equipment being inspected, so that their optical axes are roughly aligned.

[0037] 4. While observing, push the sliding rod 22 until you can see the image of the reticle lines of the equipment under inspection. At this time, the value of the diopter index line is the actual diopter value of the fixed diopter eyepiece (measurement range -2SD to +2SD).

[0038] 5. If the measurement range is insufficient, a -4D or +4D diopter auxiliary lens 29 can be connected to the middle cylinder of the left mirror of the calibrator to check the diopter adjustment range from -6SD to +6SD.

[0039] The specific steps for measuring the exit pupil diameter of the observation equipment are as follows: 1. Screw the connecting post 6 on one side of the first reticle 2 onto the second objective lens tube 8, and at the same time screw the magnification objective lens 26 onto the front end of the inner tube 20 of the second objective lens tube 8.

[0040] 2. Accurately zero the diopter of the equipment to be inspected, and rotate the adjustment knob 11 on one side of the first reticle 2 until the inspector can clearly see the first reticle 2 through the eyepiece tube 4 on that side.

[0041] 3. Place the second objective tube 8 behind the eyepiece of the equipment under inspection, so that the optical axes of the two are roughly aligned.

[0042] 4. Move the instrument body 1 backward along the outer tube 19 of the second objective tube 8 so that the exit pupil of the equipment under test is clearly imaged in the eyepiece tube 4. Then, accurately read the value of the exit pupil diameter from the first reticle 2, which is the exit pupil diameter of the equipment.

[0043] Working principle:

[0044] According to the test, the first objective lens tube 7 or the second objective lens tube 8 is screwed onto the connecting column 6. The diopter of the eyepiece 5 is adjusted by rotating the adjustment knob 11 so that the image on the first reticle 2 or the second reticle 3 can be clearly displayed. The magnification objective lens 26 is installed to measure the exit pupil diameter and exit pupil distance of the equipment. The diopter auxiliary lens 29 is installed to expand the range of diopter inspection. The calibration reticle 28 is installed to measure the visual magnification of the equipment. The support 27 is installed to prevent damage to the eyepiece when it is in close contact with the equipment to be tested.

Claims

1. A handheld observation equipment optical performance testing instrument, characterized in that: The instrument includes a main body (1), on which a first reticle (2) and a second reticle (3) are respectively provided on both sides; an eyepiece tube (4) is symmetrically connected to the rear end of the main body (1), and an eyepiece lens (5) is provided inside the eyepiece tube (4); a connecting post (6) is symmetrically provided at the front end of the main body (1), and a first objective tube (7) and a second objective tube (8) are respectively connected to the front end of the connecting post (6); a first objective lens (9) is fixedly connected inside the first objective tube (7); and a second objective lens (10) is slidably connected inside the second objective tube (8).

2. The instrument for testing the optical performance of handheld observation equipment according to claim 1, characterized in that: The eyepiece tube (4) is provided with a distance adjustment knob (11), and the moving end of the distance adjustment knob (11) is fixedly connected to the eyepiece lens (5).

3. The instrument for testing the optical performance of handheld observation equipment according to claim 1, characterized in that: The connecting column (6) is screwed into the first objective tube (7) and the second objective tube (8) via threads.

4. The instrument for testing the optical performance of handheld observation equipment according to claim 1, characterized in that: The first reticle (2) is provided with a cross-shaped reticle (15), and the vertical lines of the cross-shaped reticle (15) are provided with inclinometer reticles (16); the horizontal lines of the cross-shaped reticle (15) are provided with a first length reticle (17); the second reticle (3) is provided with a rectangular reticle (18) for measuring the parallelism of the optical axis of the equipment.

5. The instrument for testing the optical performance of handheld observation equipment according to claim 1, characterized in that: The second objective lens tube (8) includes an outer tube (19) and an inner tube (20), the inner tube (20) and the outer tube (19) being slidably connected; the second objective lens (10) is fixedly disposed inside the inner tube (20); the outer tube (19) is provided with a sliding groove (21); the inner tube (20) is provided with a sliding rod (22), the sliding rod (22) cooperating with the sliding groove (21) and passing outward through the sliding groove (21); the outer tube (19) is provided with a gradation groove (23) located on the side of the sliding groove (21), and the gradation groove (23) is provided with a graduation line (24).

6. The instrument for testing the optical performance of handheld observation equipment according to claim 5, characterized in that: It also includes an auxiliary accessory (25), which is threadedly connected to the outer end of the first objective tube (7) and / or the outer end of the inner tube (20).

7. The instrument for testing the optical performance of handheld observation equipment according to claim 6, characterized in that: The auxiliary accessories (25) include a magnification objective lens (26), a support (27), a calibration reticle (28), and a diopter aid lens (29).

8. The instrument for testing the optical performance of handheld observation equipment according to claim 7, characterized in that: The calibration reticle (28) is engraved with a second length division (36).

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