CN114993629A - Method for detecting external field optical performance of visible low-light-level night vision instrument - Google Patents
Method for detecting external field optical performance of visible low-light-level night vision instrument Download PDFInfo
- Publication number
- CN114993629A CN114993629A CN202210732314.5A CN202210732314A CN114993629A CN 114993629 A CN114993629 A CN 114993629A CN 202210732314 A CN202210732314 A CN 202210732314A CN 114993629 A CN114993629 A CN 114993629A
- Authority
- CN
- China
- Prior art keywords
- target plate
- light
- instrument
- measured
- detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Telescopes (AREA)
Abstract
The invention discloses a method for detecting the external field optical performance of a visible low-light night vision instrument, which comprises the following steps: firstly, constructing an optical performance detection system, and then carrying out optical performance detection; the detection system comprises a photoelectric instrument to be detected and a target plate adjusting module, wherein the target plate adjusting module is fixed right in front of the photoelectric instrument to be detected; the visible light target plate is detachably arranged at the top of the target plate adjusting module; the low-light-level target plate is detachably arranged at the top of the target plate adjusting module; the laser ranging module is movably arranged at the position of the photoelectric instrument to be measured; the light reduction cover is fixed on the objective lens of the photoelectric instrument to be detected; the method for detecting the external field optical performance of the visible low-light night vision instrument abandons the traditional collimator tube detection method, combines a target plate on a limited long distance, completes the detection of the photoelectric instrument to be detected, and has important significance for improving the detection efficiency of the photoelectric instrument and reducing the cost of a detection device.
Description
Technical Field
The invention relates to an optical performance detection method, in particular to an external field optical performance detection method of a visible low-light-level night vision instrument, and belongs to the technical field of optical performance detection methods.
Background
The photoelectric instrument is an instrument, equipment or system which comprehensively uses an optical technology, a photoelectric technology, a photoelectronic technology, an electronic technology, a computer technology and a precise mechanical technology as a whole and realizes a certain specific function, bears the tasks of reconnaissance, tracking, detection, night vision, fire control, early warning, navigation, guidance, photoelectric countermeasure, optical communication, photoelectric information processing and the like, has the advantages of high precision, strong resolution, large information capacity, strong electromagnetic energy resistance, good confidentiality and the like, has important value and great development prospect in military affairs, and is an important means for implementing precise striking and integrated information combat; the photoelectric instrument is operated and used in a long-time field environment, is influenced by factors such as vibration impact, sudden environmental change and the like, and inevitably causes the problems of mechanism clamping stagnation, degradation of resolution capability, component failure, shafting maladjustment and other main performance indexes, and the like, so that the normal performance of the photoelectric instrument is influenced, and the development of a detection device of the photoelectric instrument is particularly important for ensuring the main performance indexes and the performance of the photoelectric instrument; at present, photoelectric instrument detection devices are generally divided into a base-level optical performance detection device and a base-level photoelectric detection device; the ground-level Optical performance detection device is generally arranged in a rear production workshop, a repair workshop or an Optical laboratory, and can meet the Optical performance index detection of various types of photoelectric instruments, such as a general photoelectric instrument Test and maintenance System (COPI) developed by HGH infrared System company, a Modular photoelectric Test System (METS) developed by CI longitudinal frame System company, and the like; for example, the METS comprises a highly integrated optical collimation module, data processing software and a power supply control system, the optical collimation module organically integrates an off-axis paraboloid primary mirror, a surface source black body, an integrating sphere and the like through an electric target wheel, and detection indexes comprise MRTD and NETD of a thermal infrared imager, the resolution and MTF of a visible light/low-light-level night vision instrument, the laser emission energy and the beam quality of a laser ranging instrument and the like; the base-level optical performance detection device is small in size and light in weight, generally undertakes an on-line detection task, realizes the accompanying guarantee of a photoelectric instrument under an external field condition, develops base-level photoelectric detection devices of various types by the army, such as a Third-generation testing device (Portable longitudinal frame multi-spectral longitudinal frame test longitudinal frame system, PMTS) provided for the American navy, which is jointly developed by SBIR and Lockheed longitudinal frame Martin company; the PMTS adopts a modular design, comprises an optical collimation module, a power supply module and a target light source, is quickly assembled during use, is quickly disassembled after detection is finished, and is convenient to transport, and a detection object covers photoelectric equipment of each waveband of the American navy; in addition, the SBIR develops general photoelectric Test equipment (Common longitudinal frame E-0 longitudinal frame Test longitudinal frame Set, CEOTS), CEOTS adopts AN off-axis paraboloid as a main reflector, and a general runner switches a blackbody or visible light source, so that the detection of main performance indexes such as resolution of AN American military AN/PAS series thermal imaging sighting device MRTD and AN AN/PVS series micro optical sighting device is realized; the ground-level optical performance detection device has high detection precision, more detectable optical performance indexes, larger equipment volume, unsuitability for portable operation and certain requirements on the use environment, and the detection device is required to be small in volume, light in weight and good in environmental adaptability if rapid deployment or accompanying guarantee is realized under the condition of an external field environment; the basic level optical performance detection device has small volume, light weight and good environmental adaptability, and can meet the detection of main optical performance indexes of a photoelectric instrument under the condition of an external field, but no matter the basic level optical performance detection device or the basic level optical performance detection device, the collimator is adopted to simulate infinite targets to realize the detection of the main performance indexes, and the collimator is applied to the optical performance detection under the condition of the external field, so that the price of the detection device is higher on one hand, and the environmental adaptability problem needs to be considered on the other hand, such as athermalization design of the collimator, improvement of mildew-proof and fog-proof effects by filling dry and clean nitrogen into the collimator and the like.
Disclosure of Invention
In order to solve the problems, the invention provides a method for detecting the external field optical performance of a visible low-light night vision instrument, which abandons the traditional collimator tube detection method, combines a target plate on a limited long distance to finish the detection of a detected photoelectric instrument, and has important significance in improving the detection efficiency of the photoelectric instrument and reducing the cost of a detection device.
The invention discloses a method for detecting the external field optical performance of a visible light low-light-level night vision instrument, which comprises the following steps: firstly, constructing an optical performance detection system, and then carrying out optical performance detection; the detection system comprises
The measured light is measured by the photoelectric instrument,
the target plate adjusting module is fixed right in front of the photoelectric instrument to be measured;
the visible light target plate is detachably arranged at the top of the target plate adjusting module;
the low-light-level target plate is detachably arranged at the top of the target plate adjusting module;
the laser ranging module is movably arranged at the position of the photoelectric instrument to be measured;
the light reduction cover is fixed on the objective lens of the photoelectric instrument to be detected;
the optical performance detection comprises visible light instrument detection and low-light-level instrument detection, and in the detection process, the corresponding target plate is selected according to the photoelectric instrument to be detected, namely the visible light target plate for the visible light instrument detection; shimmer target plate is used in shimmer night-vision instrument detection, it specifically as follows:
when the photoelectric instrument to be detected is a visible light instrument, the detection process is as follows:
(1) under the condition of sufficient external field illumination, the photoelectric instrument to be detected is in a working state;
(2) checking a resolution index value of the measured photoelectric instrument, and determining the relative distance between the measured photoelectric instrument and the visible light target plate according to the resolution index value;
(3) measuring the relative distance between the photoelectric instrument to be measured and the visible light target plate by using the laser ranging module until the distance value required by detection is reached, and finishing the positioning of the mounting position of the target plate adjusting module;
(4) mounting a target plate adjusting module at the positioning position of the previous step, then mounting a visible light target plate on the target plate adjusting module, aligning the visible light target plate to the detected photoelectric instrument, and enabling the target plate to be parallel to the visual axis of the detected photoelectric instrument;
(5) an operator observes the division pattern on the visible light target plate through an ocular of the measured photoelectric instrument, and when the visible division pattern is observed, the corresponding resolution angle value is found by contrasting a visible light resolution lookup table, namely, the division pattern on the visible light target plate or the glimmer target plate is observed, the minimum unit pattern which can be clearly seen is found, and therefore the resolution numerical value of the measured micro-light night vision instrument is determined.
When the photoelectric instrument to be detected is a glimmer instrument, the detection process is as follows:
(1) installing a light reducing cover on an objective lens of a measured micro-optic instrument;
(2) adjusting the polarizing plate in the light reducing mask to make the angle between the polarizing plate and the analyzer plate be 90 degrees, wherein the illumination in the light reducing mask is minimum;
(3) ensuring that the tested micro-optical instrument is in a working state;
(4) checking a resolution index value of the measured photoelectric instrument, and determining the relative distance between the measured photoelectric instrument and the target plate according to the index value;
(5) measuring the relative distance between the photoelectric instrument to be measured and the micro-light target plate by using a laser ranging module until the distance value required by detection is reached; positioning of the mounting position of the target plate adjusting module is completed;
(6) mounting a target plate adjusting module at the positioning position of the last step, then mounting a low-light-level target plate on the target plate adjusting module, aligning the low-light-level target plate to the photoelectric instrument to be detected, and enabling the target plate to be parallel to the visual axis of the photoelectric instrument to be detected;
(7) an operator observes the graduation pattern on the low-light-level target plate through an eyepiece of a measured low-light-level night vision instrument, slowly adjusts the relative angle between the polarizing plate and the analyzer in the light reduction cover, the illuminance value in the light reduction cover is slowly increased, and when human eyes can normally observe the graduation pattern on the low-light-level target plate, the rotation of the polarizing plate is stopped;
(8) when the clearly visible division patterns are observed, the corresponding resolution angle value is found by contrasting the micro-light resolution lookup table, namely, the division patterns on the visible light target plate or the micro-light target plate are observed, and the clearly visible minimum unit patterns are found, so that the resolution numerical value of the measured micro-light night vision instrument is determined.
Furthermore, the dimming cover comprises a cover body, and an objective lens connecting assembly, a light metering and displaying assembly and a gradual dimming assembly are sequentially arranged on the cover body; the objective lens connecting assembly is arranged with an objective lens of the photoelectric instrument to be detected; the light measuring and displaying component is a detecting module used for detecting and displaying the ambient illumination in the light reducing cover in real time; the gradual change dimming component consists of two polarizing optical lenses of polarizing optical glass and analyzing optical glass.
Further, the target plate adjusting module is a tripod; the visible light target plate or the low-light-level target plate is connected with the tripod through a connecting rod; the laser ranging module is a laser range finder; the target plate adjusting module comprises the following adjusting processes: reliably install the connecting rod on the tripod, through adjustment tripod telescopic link, observe and make the level bubble placed in the middle, ensure tripod and ground vertical in the use.
Furthermore, the visible light target plate is composed of a thin aluminum plate, the surface of the visible light target plate is coated with a white diffuse reflection coating, the divided patterns are four stripes with different line widths and accord with the JB/T9328-1999 resolution target plate standard; the glimmer target plate is composed of homogeneous thin aluminum plates, the front surface and the back surface of the glimmer target plate are respectively provided with 85% and 35% white diffuse reflection coatings, and the division patterns are four stripes with different line widths and accord with the USAF-1951 resolution target plate standard.
Compared with the prior art, the method for detecting the external field optical performance of the visible dim-light night vision instrument abandons the traditional collimator tube detection method, combines a target plate to detect in a limited long distance, has small volume, light weight, convenient installation and removal, simple and convenient operation, portability and no need of power supply, can detect the dim-light night vision instrument in a bright light condition in the daytime by the design of the light reducing cover, greatly expands the detection time, greatly improves the detection efficiency, and has important significance for improving the detection efficiency of the photoelectric instrument and reducing the cost of a detection device.
Drawings
Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present invention.
FIG. 2 is a schematic diagram showing the resolution of the visible light target plate according to the present invention.
FIG. 3 is a schematic diagram of the resolution selection of the low-light-level target plate according to the present invention.
FIG. 4 is a schematic view of the pattern of the visible light target of the present invention.
FIG. 5 is a schematic view of a micro-light target pattern according to the present invention.
Detailed Description
Example 1:
the method for detecting the external field optical performance of the visible light low-light night vision device shown in fig. 1 to 5 specifically comprises the following steps: firstly, constructing an optical performance detection system, and then carrying out optical performance detection; the detection system comprises
The electro-optical device 1 is measured and,
the target plate adjusting module 2 is fixed right in front of the photoelectric instrument to be measured;
the visible light target plate 3 is detachably arranged on the top of the target plate adjusting module;
the low-light-level target plate 4 is detachably arranged at the top of the target plate adjusting module;
the laser ranging module 5 is movably arranged at the position of the photoelectric instrument to be measured;
the light reducing cover 6, the said light reducing cover 6 is fixed on objective 7 of the photoelectric instrument 1 measured;
the optical performance detection comprises visible light instrument detection and low-light-level instrument detection, and in the detection process, a corresponding target plate is selected according to a detected photoelectric instrument, namely the visible light target plate for detecting the visible light instrument; the low-light-level target plate for the detection of the low-light-level night vision instrument specifically comprises the following components:
when the photoelectric instrument to be detected is a visible light instrument, the detection process is as follows:
(1) under the condition of sufficient external field illumination, the photoelectric instrument to be detected is in a working state;
(2) checking a resolution index value of the measured photoelectric instrument, and determining the relative distance between the measured photoelectric instrument and the visible light target plate according to the resolution index value;
(3) measuring the relative distance between the photoelectric instrument to be measured and the visible light target plate by using the laser ranging module until the distance value required by detection is reached, and finishing the positioning of the mounting position of the target plate adjusting module;
(4) mounting a target plate adjusting module at the positioning position of the previous step, then mounting a visible light target plate on the target plate adjusting module, aligning the visible light target plate to the detected photoelectric instrument, and enabling the target plate to be parallel to the visual axis of the detected photoelectric instrument;
(5) an operator observes the division pattern on the visible light target plate through an ocular of the measured photoelectric instrument, and when the visible division pattern is observed, the corresponding resolution angle value is found by contrasting a visible light resolution lookup table, namely, the division pattern on the visible light target plate or the glimmer target plate is observed, the minimum unit pattern which can be clearly seen is found, and therefore the resolution numerical value of the measured micro-light night vision instrument is determined.
When the photoelectric instrument to be detected is a glimmer instrument, the detection process is as follows:
(1) installing a light reducing cover on an objective lens of a measured micro-optic instrument;
(2) adjusting the polarizing plate in the light reducing mask to make the angle between the polarizing plate and the analyzer plate be 90 degrees, wherein the illumination in the light reducing mask is minimum;
(3) ensuring that the tested micro-optical instrument is in a working state;
(4) checking a resolution index value of the measured photoelectric instrument, and determining the relative distance between the measured photoelectric instrument and the target plate according to the index value;
(5) measuring the relative distance between the photoelectric instrument to be measured and the low-light-level target plate by using the laser ranging module until the distance value required by detection is reached; positioning of the mounting position of the target plate adjusting module is completed;
(6) mounting a target plate adjusting module at the positioning position of the last step, then mounting a low-light-level target plate on the target plate adjusting module, aligning the low-light-level target plate to the photoelectric instrument to be detected, and enabling the target plate to be parallel to the visual axis of the photoelectric instrument to be detected;
(7) an operator observes the graduation pattern on the low-light-level target plate through an eyepiece of a measured low-light-level night vision instrument, slowly adjusts the relative angle between the polarizing plate and the analyzer in the light reduction cover, slowly increases the illumination value in the light reduction cover at the moment, and stops rotating the polarizing plate when human eyes can normally observe the graduation pattern on the low-light-level target plate;
(8) when the clearly visible division patterns are observed, the corresponding resolution angle value is found by contrasting the micro-light resolution lookup table, namely, the division patterns on the visible light target plate or the micro-light target plate are observed, and the clearly visible minimum unit patterns are found, so that the resolution numerical value of the measured micro-light night vision instrument is determined.
The light reducing cover 6 comprises a cover body, and an objective lens connecting assembly, a light measuring and displaying assembly and a gradual light reducing assembly are sequentially arranged on the cover body; the objective lens connecting assembly is arranged with an objective lens of the photoelectric instrument to be detected; the light measuring and displaying component is a detecting module used for detecting and displaying the ambient illumination in the light reducing cover in real time; the gradual change dimming component consists of two polarizing optical lenses of polarizing optical glass and analyzing optical glass.
The target plate adjusting module 2 is a tripod; a leveling bubble 8 is arranged on the tripod, and the visible light target plate or the glimmer target plate is connected with the tripod through a connecting rod; the laser ranging module is a laser range finder; the target plate adjusting module comprises the following adjusting processes: reliably install the connecting rod on the tripod, through adjustment tripod telescopic link, observe and make the level bubble placed in the middle, ensure tripod and ground vertical in the use.
The visible light target plate is composed of a thin aluminum plate, the surface of the visible light target plate is coated with a white diffuse reflection coating, and the division patterns are four stripes with different line widths and accord with the JB/T9328-1999 resolution target plate standard; the glimmer target plate is composed of homogeneous thin aluminum plates, the front surface and the back surface of the glimmer target plate are respectively provided with 85% and 35% white diffuse reflection coatings, and the division patterns 9 are four stripes with different line widths and accord with the USAF-1951 resolution target plate standard.
The visible light target plate, the shimmer target plate and the dimming cover are arranged as follows:
1. determination of the target plate dimensions: the visual field of visible light shimmer night-vision device generally is about 8, and receives the nearest observation distance restriction of photoelectric instrument, and the relative distance between target board and the measured instrument should not be less than 30 meters, if the target board size is too big then the operation of being difficult for expanding, and easily receive wind-force to influence and rock, empty even and cause the incident, consequently choose for use the target board that is not more than 1 visual field comparatively suitable, the target board size can be obtained by the following formula:
2 × 30 × tan (1 °/2) ═ 0.52 m;
2. determination of the visible light target plate dividing pattern: making a resolution plate pattern by referring to JB/T9328-1999 on the visible light target plate; the self-resolution of the visible light optical instrument is high; therefore, when the discrimination detection is carried out; etching a dividing pattern with smaller pattern, narrower line width and finer density on the visible light target plate; and the more graduation pattern of sculpture on a fixed size's target plate, has proposed higher requirement to the sculpture technology, based on the processing technology problem, the lines degree of difficulty that processing is so intensive on sheet metal is great, can regard as the low resolution benchmark of graduation pattern far away for this reason, when detecting higher resolution visible light optical instrument promptly, can realize the resolution of high resolution optical instrument through increasing the relative distance of target plate and surveyed the instrument and detect, it specifically is: if the width of the target line on the visible light target plate is P (m), the relative distance between the centers of the two line widths is 2P, and the observation distance is s (m), the resolution opening angle a (") is:
calculating the resolution angle values at different distances according to a formula to obtain a graph 2, wherein the width of the dividing pattern in the graph 2 is selected according to the relative distance between the target plate and the measured instrument being 30m, and the lines of the adjacent target plates are selected according to the relative distance between the target plate and the measured instrument being 30m
And (4) performing geometric series calculation, namely expanding the relative range distance between the target plate and the measured optical instrument from 30m to 100m, and calculating to obtain a range of detectable resolution angle values which is expanded to 2.25 'to 30'.
3. Determining the scribing pattern of the low-light-level target plate: the low-light-level target plate refers to a USAF-1951 resolution target to prepare a resolution plate pattern; the self-resolution of the low-light-level night vision instrument is lower than that of a visible light instrument, so that the area of a single partition pattern is larger, the etching is more convenient, the width of a partition line of a target plate is 8-18 mm according to the relative distance of a low-light-level target plate and the measured instrument of 20 meters; the target plate position (10-80 m) is respectively moved according to the nearest observation distance of the low-light night vision instrument, and the resolution detection of 0.2-3.6 mrad can be realized; similarly, if the width of the target line on the low-light target plate is P (mm), the relative distance between the centers of the two line widths is 2P, the observation distance is s (m), and the resolution opening angle a (mrad) is:
calculating the resolution angle values at different distances according to a formula to obtain a graph 3, wherein the width of the dividing pattern in the graph 3 is selected according to the relative distance 10m between the target plate and the measured instrument, and the lines of the adjacent target plates are selected according to the relative distance 10m between the target plate and the measured instrument
Performing geometric series calculation, namely expanding the relative range distance between the target plate and the measured optical instrument from 5m to 80m, and calculating to obtain the range of the detectable resolution angle value to be expanded to 0.2-5.71 mrad; different from the visible light target plate, the surface of the low-light-level target plate is coated with a white diffuse reflection coating, the target plate is a hollow pattern 9, and the targetThe front surface of the plate adopts a black lining plate with 0.85 contrast, and the back surface of the target plate adopts a black lining plate with 0.35 contrast; in the process of detecting different low-light night vision instruments, the front detection or the back detection of the target plate is selected according to the detection requirement.
4. A light reducing cover: the dimming cover is mainly internally provided with an adjustable dimming mirror which is two pieces of high-quality and ultra-high finish degree optical polarized glass, before a measured micro-light night vision instrument is opened, the polarization angle of the two pieces of polarized glass is adjusted to 90 degrees, then an image is output by an eyepiece of the micro-light night vision instrument through human eyes, an included angle between the polarization optical glass and the polarization detection optical glass is slowly rotated, and when the human eyes can clearly see the divided patterns on the micro-light target plate through the eyepiece of the micro-light night vision instrument and the brightness is proper, the polarization optical glass stops rotating;
5. detecting the environment: the detection environment is under natural light conditions, the ambient illumination of the target plate is close to that of the target plate, and the detection process is not obviously influenced; the solar energy collecting device is arranged in a clear atmospheric environment and avoids the influence of direct sunlight or peripheral reflectors.
The above-described embodiments are merely preferred embodiments of the present invention, and all equivalent changes or modifications of the structures, features and principles described in the claims of the present invention are included in the scope of the present invention.
Claims (4)
1. A method for detecting the external field optical performance of a visible low-light night vision instrument is characterized by comprising the following steps: constructing an optical performance detection system, and then carrying out optical performance detection; the detection system comprises
The measured light is measured by the photoelectric instrument,
the target plate adjusting module is fixed right in front of the photoelectric instrument to be measured;
the visible light target plate is detachably arranged at the top of the target plate adjusting module;
the low-light-level target plate is detachably arranged at the top of the target plate adjusting module;
the laser ranging module is movably arranged at the position of the photoelectric instrument to be measured;
the light reduction cover is fixed on the objective lens of the photoelectric instrument to be detected;
the optical performance detection comprises visible light instrument detection and low-light-level instrument detection, and in the detection process, the corresponding target plate is selected according to the photoelectric instrument to be detected, namely the visible light target plate for the visible light instrument detection; the low-light-level target plate for the detection of the low-light-level night vision instrument specifically comprises the following components:
when the photoelectric instrument to be detected is a visible light instrument, the detection process is as follows:
(1) under the condition of sufficient external field illumination, the photoelectric instrument to be detected is in a working state;
(2) checking a resolution index value of the measured photoelectric instrument, and determining the relative distance between the measured photoelectric instrument and the visible light target plate according to the resolution index value;
(3) measuring the relative distance between the photoelectric instrument to be measured and the visible light target plate by using the laser ranging module until the distance value required by detection is reached, and finishing the positioning of the mounting position of the target plate adjusting module;
(4) mounting a target plate adjusting module at the positioning position of the previous step, then mounting a visible light target plate on the target plate adjusting module, aligning the visible light target plate to the detected photoelectric instrument, and enabling the target plate to be parallel to the visual axis of the detected photoelectric instrument;
(5) an operator observes the division pattern on the visible light target plate through an ocular of the measured photoelectric instrument, and when the visible division pattern is observed, the corresponding resolution angle value is found by contrasting a visible light resolution lookup table, namely, the division pattern on the visible light target plate or the glimmer target plate is observed, the minimum unit pattern which can be clearly seen is found, and therefore the resolution numerical value of the measured micro-light night vision instrument is determined.
When the photoelectric instrument to be detected is a glimmer instrument, the detection process is as follows:
(1) installing a light reducing cover on an objective lens of a measured micro-optic instrument;
(2) adjusting the polarizing plate in the light reducing mask to make the angle between the polarizing plate and the analyzer plate be 90 degrees, wherein the illumination in the light reducing mask is minimum;
(3) ensuring that the tested micro-optical instrument is in a working state;
(4) checking a resolution index value of the measured photoelectric instrument, and determining the relative distance between the measured photoelectric instrument and the target plate according to the index value;
(5) measuring the relative distance between the photoelectric instrument to be measured and the low-light-level target plate by using the laser ranging module until the distance value required by detection is reached; positioning of the mounting position of the target plate adjusting module is completed;
(6) mounting a target plate adjusting module at the positioning position of the last step, then mounting a low-light-level target plate on the target plate adjusting module, aligning the low-light-level target plate to the photoelectric instrument to be measured, and enabling the target plate to be parallel to the visual axis of the photoelectric instrument to be measured;
(7) an operator observes the graduation pattern on the low-light-level target plate through an eyepiece of a measured low-light-level night vision instrument, slowly adjusts the relative angle between the polarizing plate and the analyzer in the light reduction cover, slowly increases the illumination value in the light reduction cover at the moment, and stops rotating the polarizing plate when human eyes can normally observe the graduation pattern on the low-light-level target plate;
(8) when the clearly visible division patterns are observed, the corresponding resolution angle value is found by contrasting the micro-light resolution lookup table, namely, the division patterns on the visible light target plate or the micro-light target plate are observed, and the clearly visible minimum unit patterns are found, so that the resolution numerical value of the measured micro-light night vision instrument is determined.
2. The method for detecting the external field optical performance of the visible low-light night vision device as claimed in claim 1, wherein: the dimming cover comprises a cover body, and an objective lens connecting assembly, a light metering and displaying assembly and a gradual dimming assembly are sequentially arranged on the cover body; the objective lens connecting assembly is arranged with an objective lens of the photoelectric instrument to be detected; the light measuring and displaying component is a detecting module used for detecting and displaying the ambient illumination in the light reducing cover in real time; the gradual change dimming component consists of two polarizing optical lenses of polarizing optical glass and analyzing optical glass.
3. The method for detecting the external field optical performance of the visible low-light night vision device as claimed in claim 1, wherein: the target plate adjusting module is a tripod; the visible light target plate or the low-light-level target plate is connected with the tripod through a connecting rod; the laser ranging module is a laser range finder; the target plate adjusting module comprises the following adjusting processes: reliably install the connecting rod on the tripod, through adjustment tripod telescopic link, observe and make the level bubble placed in the middle, ensure tripod and ground vertical in the use.
4. The method for detecting the external field optical performance of the visible low-light night vision device as claimed in claim 1, wherein: the visible light target plate is composed of a thin aluminum plate, the surface of the visible light target plate is coated with a white diffuse reflection coating, and the division patterns are four stripes with different line widths and accord with the JB/T9328-1999 resolution target plate standard; the glimmer target plate is composed of homogeneous thin aluminum plates, the front surface and the back surface of the glimmer target plate are respectively provided with 85% and 35% white diffuse reflection coatings, and the division patterns are four stripes with different line widths and accord with the USAF-1951 resolution target plate standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210732314.5A CN114993629B (en) | 2022-06-23 | 2022-06-23 | Method for detecting external field optical performance of visible light low-light night vision instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210732314.5A CN114993629B (en) | 2022-06-23 | 2022-06-23 | Method for detecting external field optical performance of visible light low-light night vision instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114993629A true CN114993629A (en) | 2022-09-02 |
| CN114993629B CN114993629B (en) | 2024-06-07 |
Family
ID=83037898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210732314.5A Active CN114993629B (en) | 2022-06-23 | 2022-06-23 | Method for detecting external field optical performance of visible light low-light night vision instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114993629B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040174506A1 (en) * | 2002-12-13 | 2004-09-09 | Smith Bruce W. | Method for aberration detection and measurement |
| US7391504B1 (en) * | 2005-12-14 | 2008-06-24 | The United States Of America As Represented By The Secretary Of The Air Force | Low cost night vision apparatus and cockpit lighting compatibility evaluation via visual acuity |
| US20100220303A1 (en) * | 2007-11-16 | 2010-09-02 | Carl Zeiss Smt Ag | Optical system and method for characterising an optical system |
| CN103398837A (en) * | 2013-07-17 | 2013-11-20 | 中国人民解放军济南军区72465部队 | Reflected light path-based low-light level night vision device resolution detection method and device |
| US20150345906A1 (en) * | 2013-12-24 | 2015-12-03 | Deepak Varshneya | Electro-optic system for crosswind measurement |
| CN204924617U (en) * | 2015-09-14 | 2015-12-30 | 中国人民解放军武汉军械士官学校 | Integration low -light level night vision device performance detects leading optical system |
| CN211717753U (en) * | 2019-10-22 | 2020-10-20 | 长春军晟科技有限公司 | External field performance testing device for photoelectric instrument |
| CN112731665A (en) * | 2020-12-31 | 2021-04-30 | 中国人民解放军32181部队 | Self-adaptive binocular stereoscopic vision low-light night vision head-mounted system |
| CN113686551A (en) * | 2021-08-20 | 2021-11-23 | 北方夜视技术股份有限公司 | Portable image intensifier resolution measuring device and measuring method |
| CN217878282U (en) * | 2022-06-23 | 2022-11-22 | 中国人民解放军32181部队 | External field optical performance detection device of visible light shimmer night vision instrument |
-
2022
- 2022-06-23 CN CN202210732314.5A patent/CN114993629B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040174506A1 (en) * | 2002-12-13 | 2004-09-09 | Smith Bruce W. | Method for aberration detection and measurement |
| US7391504B1 (en) * | 2005-12-14 | 2008-06-24 | The United States Of America As Represented By The Secretary Of The Air Force | Low cost night vision apparatus and cockpit lighting compatibility evaluation via visual acuity |
| US20100220303A1 (en) * | 2007-11-16 | 2010-09-02 | Carl Zeiss Smt Ag | Optical system and method for characterising an optical system |
| CN103398837A (en) * | 2013-07-17 | 2013-11-20 | 中国人民解放军济南军区72465部队 | Reflected light path-based low-light level night vision device resolution detection method and device |
| US20150345906A1 (en) * | 2013-12-24 | 2015-12-03 | Deepak Varshneya | Electro-optic system for crosswind measurement |
| CN204924617U (en) * | 2015-09-14 | 2015-12-30 | 中国人民解放军武汉军械士官学校 | Integration low -light level night vision device performance detects leading optical system |
| CN211717753U (en) * | 2019-10-22 | 2020-10-20 | 长春军晟科技有限公司 | External field performance testing device for photoelectric instrument |
| CN112731665A (en) * | 2020-12-31 | 2021-04-30 | 中国人民解放军32181部队 | Self-adaptive binocular stereoscopic vision low-light night vision head-mounted system |
| CN113686551A (en) * | 2021-08-20 | 2021-11-23 | 北方夜视技术股份有限公司 | Portable image intensifier resolution measuring device and measuring method |
| CN217878282U (en) * | 2022-06-23 | 2022-11-22 | 中国人民解放军32181部队 | External field optical performance detection device of visible light shimmer night vision instrument |
Non-Patent Citations (3)
| Title |
|---|
| 张勇 等: "军用光学性能检测设备设计与分析", 激光与红外, 20 November 2022 (2022-11-20), pages 1695 - 1700 * |
| 杨欣;: "检测光学装备性能的装置", 电子质量, no. 05, 20 May 2020 (2020-05-20), pages 19 - 22 * |
| 江恒;王小兵;张晶;祝宝辉;: "基于机器视觉的微光夜视仪整机检测系统设计", 应用光学, no. 03, 15 May 2016 (2016-05-15), pages 23 - 27 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114993629B (en) | 2024-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7365838B2 (en) | System and method for the measurement of optical distortions | |
| US8692995B2 (en) | Optical system for projecting an IR or UV test signal with optical alignment of the projection axis in the visible spectral region | |
| CN111458108B (en) | Transmitting-receiving optical axis parallelism measuring device and measuring method | |
| CN111665023B (en) | A telescope distortion measurement device and method | |
| CN217878282U (en) | External field optical performance detection device of visible light shimmer night vision instrument | |
| CN114236559A (en) | Common-aperture six-waveband imaging spectrum ranging optical system for low-slow small aircraft | |
| CN113959469A (en) | Electronic internal focusing collimator | |
| CN103398837A (en) | Reflected light path-based low-light level night vision device resolution detection method and device | |
| CN108680188A (en) | PST (Power System test) and extremely weak target simulation system and PST and detection capability test method | |
| CN108267114B (en) | Auto-collimation total station and working method thereof | |
| CN208333496U (en) | PST test and extremely weak target simulation system | |
| CN113325390B (en) | Three-light axis adjusting method and system in fixed structure | |
| CN114993629B (en) | Method for detecting external field optical performance of visible light low-light night vision instrument | |
| CN106247998A (en) | A kind of laser axis and the calibration method of reflecting mirror normal parallel | |
| RU175758U1 (en) | Wide Field Solar Sensor | |
| CN102749188B (en) | Detection device applied to optical system | |
| CN110657959A (en) | Universal device for detecting performance of photoelectric night vision instrument | |
| CN215296620U (en) | A Wide Range Distortion Measurement Device | |
| RU162917U1 (en) | TWO-MIRROR OPTICAL SYSTEM ADJUSTMENT DEVICE | |
| CN215218016U (en) | Off-axis target simulator for multi-spectral band composite photoelectric equipment focusing and axis adjustment | |
| CN114413683A (en) | A portable multi-condition universal axle alignment device | |
| RU63054U1 (en) | LASER RANGEFINDER | |
| Liu et al. | Evaluation method to obtain a fiducial fiber metrology benchmark for the Large Sky Area Multi-Object Fiber Spectroscopic Telescope | |
| CN116105983B (en) | Optical axis parallelism auto-collimation detection device and method for visible light multi-optical-path system | |
| CN205121068U (en) | Big visual field collimator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |