CN110346120B - System and method for testing strong light resolution and dynamic range of automatic gate control image intensifier - Google Patents
System and method for testing strong light resolution and dynamic range of automatic gate control image intensifier Download PDFInfo
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Abstract
The invention discloses a test system and a test method for strong light resolution and dynamic range of an automatic gate control image intensifier, wherein the test system comprises a light source module, an optical component module, an objective lens component module, a camera box, an eyepiece component module, a detection module, an industrial personal computer and a power supply module, wherein the light source module, the optical component module, the objective lens component module, the camera box, the eyepiece component module and the detection module are sequentially arranged on the same fixed optical platform guide rail, and the centers of the light source module, the optical component module, the objective lens component module, the camera box, the eyepiece component module and the detection module; the invention solves the problem that the strong light resolution and the dynamic range of the automatic gate control image intensifier can not be measured in a breakthrough way; the strong optical resolution is automatically identified by the industrial personal computer in the test system, so that the subjective error of visual test of human eyes is effectively avoided, and the test accuracy and the test efficiency are improved; meanwhile, the test of strong optical resolution and dynamic range is integrated on one test system, so that the operation is convenient, the cost is saved, and the reliability is high.
Description
Technical Field
The invention relates to the technical field of automatic gate control image intensifiers, in particular to a test system and a test method for realizing strong optical resolution and dynamic range of an automatic gate control image intensifier.
Background
The image intensifier is a core device of low-light night vision equipment and can intensify weak light to enough brightness so as to be convenient for human eyes to observe. The strong light resolution and dynamic range of the automatic gate control image intensifier are closely related to the performance of the automatic gate control power supply, and the dynamic range and the service life of the automatic gate control image intensifier using the automatic gate control power supply to replace the traditional high-voltage power supply are greatly improved.
The strong light discrimination and the dynamic range are important indexes for measuring the imaging definition of the automatic gate control image intensifier in a high-illumination environment, and are important bases for judging whether the automatic gate control image intensifier can be used in an illumination complex and variable environment.
Since the research on the automatic gate control image intensifier in China starts late and the technology is not mature, the performance indexes such as strong optical resolution, dynamic range and the like can not be measured at present, and with the gradual maturity of the automatic gate control image intensifier technology, the indexes become basic indexes for measuring the performance of the automatic gate control image intensifier; therefore, it is necessary to research the testing technology of the performance indexes such as strong optical resolution and dynamic range of the automatic gated image intensifier.
Disclosure of Invention
The invention aims to provide a test system which has high test efficiency, reliable test result, low cost and easy operation and is used for solving the measurement problems of strong optical resolution and dynamic range of an automatic gate control image intensifier.
In order to solve the above technical problems, the present invention provides a system for testing the strong optical resolution and dynamic range of an automatic gated image intensifier, comprising:
a light source module: the device consists of a light source, a neutral filter component and an integrating sphere; a collimated light source for providing required illumination for the test system;
an optical component module: for providing suitable optical components according to different test requirements;
an objective lens assembly module: a light source for coupling light passing through the optical assembly module to the entire cathode face of the automatically gated image intensifier;
dark box: the system is used for providing a relatively independent illumination environment for the automatic gate control image intensifier to be detected;
an eyepiece lens assembly module: coupling the optical signal output by the automatic gate control image intensifier to an imaging photoelectric surface of the detection module;
a detection module: the industrial personal computer is used for placing different detection components for detection according to different testing links and transmitting detection information to the industrial personal computer;
an industrial personal computer: the system comprises a detection module, a power supply, a parameter setting module, an image acquisition module and a data processing module, wherein the detection module is used for providing a power supply for the detection module, setting parameters and acquiring images for the detection module, and processing detection information transmitted by the detection module to obtain a detection result;
a power supply module: the automatic gate control image intensifier is used for providing a reliable power supply for a light source and the automatic gate control image intensifier to be measured;
the light source module, the optical component module, the objective lens component module, the camera box, the eyepiece component module and the detection module are sequentially placed on the same fixed optical platform guide rail, and the centers of the light source module, the optical component module, the objective lens component module, the camera box, the eyepiece component module and the detection module are located on the same optical axis.
In addition, the invention also provides a method for testing the high light resolution by using the automatic gate control image intensifier high light resolution test system, which comprises the following steps:
a1: electrifying the power supply module, preheating the light source for 20min, adjusting the neutral optical filter assembly to obtain the illumination intensity of 10 at the distance corresponding to the cathode surface of the automatic gate control image intensifier to be detected2lx-grade intense light;
a2: placing the automatic door control image intensifier on a clamp arranged in a camera bellows, reliably connecting the automatic door control image intensifier with a power supply interface of a power supply module, and closing the camera bellows;
a3: a CMOS detection assembly is placed on the detection module, the CMOS detection assembly is reliably connected with the eyepiece assembly module and the industrial personal computer, and a resolution test target plate is selected as an optical assembly module;
a4: the industrial control computer controls the CMOS detection assembly to collect the clear image of the resolution test target plate output by the fluorescent screen of the automatic gate control image intensifier at the moment, and the image is compared and identified to obtain the strong light resolution of the automatic gate control image intensifier.
Meanwhile, the invention also provides a method for testing the dynamic range by using the automatic gate control image intensifier dynamic range testing system, which is characterized by comprising the following steps: setting the typical minimum imaging illumination intensity of the automatic gate control image intensifier to be tested as Imin0Typical maximum imaging illumination is Imax0(ii) a The index requirements of the qualified automatic gate control image intensifier are as follows: SNR is greater than or equal to SNRmin，SNRminThe minimum signal-to-noise ratio required by the automatic gate control image intensifier when the automatic gate control image intensifier works normally; resolution R is greater than or equal to Rmin，RminThe minimum resolution required by the automatic gate control image intensifier when the automatic gate control image intensifier works normally; average brightness B ∈ [ (1-a) Bs，(1+a)Bs]A is a constant determined according to the test requirements of the automatic gate control image intensifier to be tested, BsCalibrating the brightness value for the fluorescent screen; the specific test comprises the following steps:
b: testing the lowest imaging illumination intensity of the automatic gate control image intensifier;
b1: the power module is powered on, the light source is preheated for 20min, and the optical assembly contained in the test system is adjusted, so that the test system can clearly image;
b2: adjusting the neutral optical filter component to obtain the illumination intensity I of the distance corresponding to the cathode surface of the automatic gate control image intensifier to be detectedmin0The weak light of (2);
b3: placing the automatic door control image intensifier on a clamp arranged in a dark box (7), reliably connecting the automatic door control image intensifier with a power supply interface of a power supply module (11), and closing the dark box (7);
b4: a CMOS detection assembly is placed on the detection module, the CMOS detection assembly is reliably connected with the eyepiece assembly module and the industrial personal computer, and a resolution test target plate is selected as an optical assembly module;
b5: the CMOS detection assembly controlled by the industrial personal computer collects a clear image of the resolution test target plate at the moment, and the clear image is compared and identified to obtain the resolution R of the automatic gate control image intensifier under the current illumination conditionL0；
B6: the signal-to-noise ratio component is arranged on the detection module, and the signal-to-noise ratio component and the object are detectedThe mirror assembly module is reliably connected with the industrial personal computer, and the pinhole diaphragm is selected as the optical assembly module to obtain the SNR of the current signal-to-noise ratio by testingL0；
B7: a brightness detection assembly is arranged on the detection module, the brightness detection assembly is reliably connected with the eyepiece assembly module and the industrial personal computer, meanwhile, the ground glass is selected as the optical assembly module, and the current brightness B is obtained through testingL0；
B8: r obtained by the test of the stepsL0、SNRL0、BL0The belt-in type (1),
judgment of RL0、SNRL0、BL0If the formula (1) is satisfied, the neutral-density filter component is adjusted to adjust the incident light to a lower distance illumination intensity Imin1And repeating the steps B3-B7 until the resolution, the signal-to-noise ratio and the brightness obtained by the test just do not satisfy the formula (1), and the current illumination is Iminn+1Then record IminnIs the lowest imaging illumination; if not, adjusting the neutral optical filter component, increasing the distance illumination of the incident light, and repeating the steps B3-B7 until the resolution, the signal-to-noise ratio and the brightness just meet the formula (1) and the corresponding illumination IminnIs the lowest imaging illumination;
c: testing the highest imaging illumination of the automatic gate control image intensifier;
c1: the power module is powered on, the light source is preheated for 20min, and the optical assembly contained in the test system is adjusted, so that the test system can clearly image;
c2: adjusting the neutral optical filter component to obtain the illumination intensity I of the distance corresponding to the cathode surface of the automatic gate control image intensifier to be detectedmax0Strong light of (2);
c3: placing the automatic door control image intensifier on a clamp arranged in a camera bellows, reliably connecting the automatic door control image intensifier with a power supply interface of a power supply module, and closing the camera bellows;
c4: a CMOS detection assembly is placed on the detection module, the CMOS detection assembly is reliably connected with the eyepiece assembly module and the industrial personal computer, and a resolution test target plate is selected as an optical assembly module;
c5: the CMOS detection assembly controlled by the industrial personal computer collects a clear image of the resolution test target plate at the moment, and the clear image is compared and identified to obtain the resolution R of the automatic gate control image intensifier under the current illumination conditionHO；
C6: the signal-to-noise ratio detection module is placed on the detection module, the signal-to-noise ratio detection module is reliably connected with the objective lens assembly module and the industrial personal computer, and meanwhile, the pinhole diaphragm is selected as the optical assembly module to obtain the current signal-to-noise ratio SNR through testingHO；
C7: a brightness detection assembly is arranged on the detection module, the brightness detection assembly is reliably connected with the eyepiece assembly module and the industrial personal computer, meanwhile, the ground glass is selected as the optical assembly module, and the current brightness B is obtained through testingH0；
C8: r obtained by the test of the stepsHO、SNRHO、BHOThe belt-in type (2),
judgment of RHO、SNRHO、BHOIf the formula (2) is satisfied, the neutral-density filter component is adjusted to adjust the incident light to a higher illumination Imax1And repeating the steps C3-C7 until the resolution, the signal-to-noise ratio and the brightness obtained by the test just do not satisfy the formula (2), and the current illumination is Imaxn+1Then record ImaxnThe highest imaging illumination intensity; if not, adjusting the neutral optical filter component, reducing the illumination of the incident light, and repeating the steps C3-C7 until the resolution, the signal-to-noise ratio and the brightness just meet the formula (2) and the corresponding illumination ImaxnThe highest imaging illumination intensity;
D. the lowest imaging illumination intensity I of the automatic gate control image intensifier obtained in the step BminnAnd step C, obtaining the highest imaging illumination I of the automatic gating image intensifiermaxnCarry-in (3) to obtain dynamic range of automatic gated image intensifierEnclosing:
HDR＝20lg(Imaxn/Iminn) (3)
has the advantages that: compared with the prior art, the invention has the following advantages: the invention solves the problem that the strong light resolution and the dynamic range of the automatic gate control image intensifier can not be measured in the prior art; the strong optical resolution is automatically identified by the industrial personal computer in the test system, so that the subjective error of visual test of human eyes is effectively avoided, and the test accuracy and the test efficiency are improved; meanwhile, the test of strong optical resolution and dynamic range is integrated on one test system, so that the operation is convenient, the cost is saved, and the reliability is high.
Drawings
FIG. 1 is a schematic diagram of a system for testing the strong optical resolution and dynamic range of an automatic gated image intensifier according to the present invention;
in fig. 1: 1 is a light source module, 2 is a light source, 3 is a neutral filter component, 4 is an integrating sphere, 5 is an optical component module, 6 is an objective lens component module, 7 is a dark box, 8 is an eyepiece component module, 9 is a detection module, 10 is an industrial personal computer, and 11 is a power supply module;
FIG. 2 is a schematic view of the structure of a dark box;
in fig. 2: 13 is a light inlet hole through which light emitted by the objective lens assembly module enters;
14 is a diaphragm I, and the output light of the objective lens assembly module is coupled to the cathode surface of the automatic gate control image intensifier to be detected;
15, an automatic gate control image intensifier to be detected is placed on an image intensifier clamp;
16 is an image intensifier clamp which plays the roles of supporting and fixing the image intensifier and shading light;
17 is a diaphragm II, and the output light of the automatic gate control image intensifier to be detected is coupled to the eyepiece component module;
18 is a light outlet, and the fluorescent screen of the automatic door control image intensifier to be measured emits light to be emitted;
the 19 is a base, the image intensifier clamp is arranged on the base, and the position of the base is adjustable so as to ensure that the horizontal position and the central height of the measured image intensifier are unchanged;
20 is the negative end of the power supply interface, and provides a power supply interface of a power supply for the automatic door control image intensifier to be detected in the camera bellows;
and 21 is the positive end of a power supply interface, and provides a power supply interface of a power supply for the automatic door control image intensifier to be detected in the camera bellows.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a system for testing the strong optical resolution and dynamic range of an automatic gate control image intensifier, which comprises:
light source module 1: the device consists of a light source 2, a neutral filter component 3 and an integrating sphere 4; a collimated light source for providing required illumination for the test system; the light source 2 adopts a standard A light source with the color temperature of 2856K or an LED light source with the adjustable color temperature; the neutral optical filter component 3 is composed of a plurality of groups of optical filters, and the adjustment of the incident illumination is realized through the adjustment of the neutral optical filter component; the integrating sphere 4 serves to uniformly scatter the light passing through the neutral filter assembly 3 to the optical assembly module.
The optical component module 5: the optical component module 5 can be selectively replaced by a pinhole diaphragm or a resolution test target plate or ground glass or a specific target test pattern according to different test requirements.
Objective lens assembly module 6: a light source for coupling light passing through the optical assembly module to the entire cathode face of the automatically gated image intensifier;
a dark box 7: the system is used for providing a relatively independent illumination environment for the automatic gate control image intensifier to be detected;
eyepiece assembly module 8: coupling the optical signal output by the automatic gate control image intensifier to an imaging photoelectric surface of the detection module 9;
the detection module 9: the industrial personal computer is used for placing different detection components for detection according to different testing links and transmitting detection information to the industrial personal computer; the detection module 9 is a CMOS detection component, a signal-to-noise ratio detection component, or a brightness detection component according to different test requirements.
An industrial personal computer 10: the system is used for providing a power supply for the detection module 9, setting parameters and acquiring images of the detection module 9, and processing detection information transmitted by the detection module 9 to obtain a detection result;
the power supply module 11: the automatic gate control image intensifier is used for providing a reliable power supply for a light source and the automatic gate control image intensifier to be measured;
the light source module 1, the optical component module 5, the objective lens assembly module 6, the camera box 7, the eyepiece assembly module 8 and the detection module 9 are sequentially placed on the same fixed optical platform guide rail, and the centers of the light source module 1, the optical component module 5, the objective lens assembly module 6, the camera box 7, the eyepiece assembly module 8 and the detection module 9 are located on the same optical axis.
The structure of the objective lens assembly module 6 is that the objective lens assembly module is composed of a component 1: 1 and a shading tube thereof.
The camera bellows 7 is composed of a case body, a base and an image intensifier clamp, the image intensifier clamp is arranged on the base, and the position of the base is adjustable so as to ensure that the horizontal position and the central height of the measured image intensifier are unchanged; round windows are arranged on the left side and the right side of the camera bellows to provide a passage for incident light and emergent light, and a power supply interface for providing a power supply for the automatic door control image intensifier to be detected is also arranged in the camera bellows.
The eyepiece lens assembly module 8 is composed of a lens assembly with a certain magnification and a shading cylinder.
In order to describe the specific functions of the system for testing the high light resolution and the dynamic range of the automatic gated image intensifier in detail, the following embodiment is adopted to specifically describe the usage method of the system.
The test is carried out under the darkroom condition by using the automatic gating image intensifier strong light resolution and dynamic range test systemAnd the room is completely made of non-reflective black materials, so that the influence of ambient light on a test result is reduced as much as possible, the test system is electrified before the test, and the color temperature is calibrated. At an incident illuminance of 10-5When lx, setting the brightness gain of the automatic gate control image intensifier as Ks, wherein the Ks accords with the required brightness gain range of the product to be tested and is kept unchanged in the test process; the brightness gain is Ks and the incident illumination is 10-1And when lx is needed, calibrating the average output brightness of the automatic gate control image intensifier with Bs, wherein the Bs conforms to the required brightness range of the product to be detected.
Example one
The method for testing the high light resolution by using the automatic gating image intensifier high light resolution test system comprises the following steps:
a1: the power supply module 11 is powered on, the light source 2 is preheated for 20min, the neutral optical filter component 3 is adjusted, and the distance illumination corresponding to the cathode surface of the automatic gate control image intensifier to be detected is 102lx-grade intense light;
a2: placing the automatic door control image intensifier on a clamp arranged in the camera bellows 7, reliably connecting the automatic door control image intensifier with a power supply interface of the power supply module 11, and closing the camera bellows 7;
a3: a CMOS detection component is placed on the detection module 9, the CMOS detection component is reliably connected with the eyepiece component module 8 and the industrial personal computer (10), and a resolution test target plate is selected as the optical component module 5;
a4: the industrial personal computer 10 controls the CMOS detection assembly to collect the clear image of the resolution test target plate output by the fluorescent screen of the automatic gate control image intensifier at the moment, and the image is compared and identified to obtain the strong light resolution of the automatic gate control image intensifier.
Example two
The method for testing dynamic range by using the dynamic range testing system of the automatic gate control image intensifier sets the typical lowest imaging illumination intensity of the automatic gate control image intensifier to be tested as Imin0Typical maximum imaging illumination is Imax0(ii) a The index requirements of the qualified automatic gate control image intensifier are as follows: SNR is greater than or equal to SNRmin，SNRminThe minimum signal-to-noise ratio required by the automatic gate control image intensifier when the automatic gate control image intensifier works normally; resolutionForce R is greater than or equal to Rmin，RminThe minimum resolution required by the automatic gate control image intensifier when the automatic gate control image intensifier works normally; average brightness B ∈ [ (1-a) Bs，(1+a)Bs]A is a constant determined according to the test requirements of the automatic gate control image intensifier to be tested, BsCalibrating the brightness value for the fluorescent screen; the specific test comprises the following steps:
b: testing the lowest imaging illumination intensity of the automatic gate control image intensifier;
b1: the power module 11 is powered on, the light source 2 is preheated for 20min, and the optical assembly contained in the test system is adjusted, so that the test system can clearly image;
b2: adjusting the neutral optical filter component 3 to obtain the illumination intensity I of the distance corresponding to the cathode surface of the automatic gate control image intensifier to be detectedmin0The weak light of (2);
b3: placing the automatic door control image intensifier on a clamp arranged in the camera bellows 7, reliably connecting the automatic door control image intensifier with a power supply interface of the power supply module 11, and closing the camera bellows 7;
b4: a CMOS detection component is placed on the detection module 9, the CMOS detection component is reliably connected with the eyepiece component module 8 and the industrial personal computer 10, and a resolution test target plate is selected as the optical component module 5;
b5: the industrial personal computer 10 controls the CMOS detection assembly to collect a clear image of the resolution test target plate at the moment, and the clear image is compared and identified to obtain the resolution R of the automatic gate control image intensifier under the current illumination conditionL0；
B6: the signal-to-noise ratio component is placed on the detection module 9, the signal-to-noise ratio detection component is reliably connected with the objective lens component module 8 and the industrial personal computer 10, meanwhile, the pinhole diaphragm is selected as the optical component module 5, and the current signal-to-noise ratio SNR is obtained through testingL0；
B7: a brightness detection component is arranged on the detection module 9, the brightness detection component is reliably connected with the eyepiece component module 8 and the industrial personal computer 10, meanwhile, frosted glass is selected as the optical component module 5, and the current brightness B is obtained through testingL0；
B8: r obtained by the test of the stepsL0、SNRL0、BL0The belt-in type (1),
judgment of RL0、SNRL0、BL0If the formula (1) is satisfied, the neutral filter assembly 3 is adjusted to adjust the incident light to a lower distance illumination Imin1And repeating the steps B3-B7 until the resolution, the signal-to-noise ratio and the brightness obtained by the test just do not satisfy the formula (1), and the current illumination is Iminn+1Then record IminnIs the lowest imaging illumination; if not, adjusting the neutral optical filter component 3, increasing the distance illumination of the incident light, and repeating the steps B3-B7 until the resolution, the signal-to-noise ratio and the brightness just meet the formula (1) and the corresponding illumination IminnIs the lowest imaging illumination;
c: testing the highest imaging illumination of the automatic gate control image intensifier;
c1: the power module 11 is powered on, the light source 2 is preheated for 20min, and the optical assembly contained in the test system is adjusted, so that the test system can clearly image;
c2: adjusting the neutral optical filter component 3 to obtain the illumination intensity I of the distance corresponding to the cathode surface of the automatic gate control image intensifier to be detectedmax0Strong light of (2);
c3: placing the automatic door control image intensifier on a clamp arranged in the camera bellows 7, reliably connecting the automatic door control image intensifier with a power supply interface of the power supply module 11, and closing the camera bellows 7;
c4: a CMOS detection component is placed on the detection module 9, the CMOS detection component is reliably connected with the eyepiece component module 8 and the industrial personal computer 10, and a resolution test target plate is selected as the optical component module 5;
c5: the industrial personal computer 10 controls the CMOS detection assembly to collect a clear image of the resolution test target plate at the moment, and the clear image is compared and identified to obtain the resolution R of the automatic gate control image intensifier under the current illumination conditionHO；
C6: the signal-to-noise ratio component is arranged on the detection module 9, and the signal-to-noise ratio detection component, the objective lens component module 8 and the industrial personal computer are connected with the signal-to-noise ratio detection component10 reliable connection, simultaneously selecting a pinhole diaphragm as the optical component module 5, and testing to obtain the current signal-to-noise ratio SNRHO；
C7: a brightness detection component is arranged on the detection module 9, the brightness detection component is reliably connected with the eyepiece component module 8 and the industrial personal computer 10, meanwhile, frosted glass is selected as the optical component module 5, and the current brightness B is obtained through testingHO；
C8: r obtained by the test of the stepsH0、SNRHO、BHOThe belt-in type (2),
judgment of RHO、SNRHO、BHOIf the formula (2) is satisfied, the neutral filter assembly 3 is adjusted to adjust the incident light to a higher illuminance Imax1And repeating the steps C3-C7 until the resolution, the signal-to-noise ratio and the brightness obtained by the test just do not satisfy the formula (2), and the current illumination is Imaxn+1Then record ImaxnThe highest imaging illumination intensity; if not, adjusting the neutral filter assembly 3, reducing the illumination of the incident light, and repeating the steps C3-C7 until the resolution, the signal-to-noise ratio and the brightness just meet the formula (2) and the corresponding illumination ImaxnThe highest imaging illumination intensity;
D. the lowest imaging illumination intensity I of the automatic gate control image intensifier obtained in the step BminnAnd step C, obtaining the highest imaging illumination I of the automatic gating image intensifiermaxnCarry-in (3), resulting in the dynamic range of the automatically gated image intensifier:
HDR＝20lg(Imaxn/Iminn) (3)。
the invention provides a test system for the strong light resolution and the dynamic range of an automatic gated image intensifier, and also provides a specific use method of the test system in measuring the strong light resolution and the dynamic range of the automatic gated image intensifier, thereby realizing the accurate and convenient measurement of the strong light resolution and the dynamic range of important technical indexes of the automatic gated image intensifier and providing an important basis for judging whether the automatic gated image intensifier can be used in a complex and changeable illumination environment.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. A kind of test system of strong light resolution and dynamic range of automatic gate control image intensifier, characterized by that including:
light source module (1): the device comprises a light source (2), a neutral filter component (3) and an integrating sphere (4); a collimated light source for providing required illumination for the test system;
optical component module (5): for providing suitable optical components according to different test requirements;
objective assembly module (6): a light source for coupling light passing through the optical assembly module to the entire cathode face of the automatically gated image intensifier;
dark box (7): the system is used for providing a relatively independent illumination environment for the automatic gate control image intensifier to be detected;
eyepiece assembly module (8): an imaging photoelectric surface for coupling the optical signal output by the automatic gating image intensifier to a detection module (9);
detection module (9): the industrial personal computer is used for placing different detection components for detection according to different testing links and transmitting detection information to the industrial personal computer;
industrial personal computer (10): the system is used for providing a power supply for the detection module (9), setting parameters and acquiring images of the detection module (9), and processing detection information transmitted by the detection module (9) to obtain a detection result;
power module (11): the automatic gate control image intensifier is used for providing a reliable power supply for a light source and the automatic gate control image intensifier to be measured;
the light source module (1), the optical component module (5), the objective lens assembly module (6), the camera box (7), the eyepiece lens assembly module (8) and the detection module (9) are sequentially placed on the same fixed optical platform guide rail, and the centers of the light source module (1), the optical component module (5), the objective lens assembly module (6), the camera box (7), the eyepiece lens assembly module (8) and the detection module (9) are located on the same optical axis.
2. The system for testing the robust optical resolution and dynamic range of an automatically gated image intensifier of claim 1, wherein: the light source (2) adopts a standard A light source with the color temperature of 2856K or an LED light source with the adjustable color temperature.
3. The system for testing the robust optical resolution and dynamic range of an automatically gated image intensifier of claim 1, wherein: the neutral optical filter box (3) is composed of a plurality of groups of optical filters, and incident illumination is adjusted through adjustment of the neutral optical filter box.
4. The system for testing the robust optical resolution and dynamic range of an automatically gated image intensifier of claim 1, wherein: the optical component module (5) is a pinhole diaphragm or a resolution test target plate or ground glass.
5. The system for testing the robust optical resolution and dynamic range of an automatically gated image intensifier of claim 1, wherein: the structure of the objective lens assembly module (6) is as follows: the objective lens assembly module consists of 1: 1, and a light shielding tube.
6. The system for testing the robust optical resolution and dynamic range of an automatically gated image intensifier of claim 1, wherein: the camera bellows (7) consists of a case body, a base and an image intensifier clamp, the image intensifier clamp is arranged on the base, and the position of the base is adjustable so as to ensure that the horizontal position and the central height of the measured image intensifier are unchanged; round windows are arranged on the left side and the right side of the camera bellows to provide a passage for incident light and emergent light, and a power supply interface for providing a power supply for the automatic door control image intensifier to be detected is also arranged in the camera bellows.
7. The system for testing the robust optical resolution and dynamic range of an automatically gated image intensifier of claim 1, wherein: the eyepiece lens assembly module (8) is structured as follows: the eyepiece lens assembly module consists of a lens combination with a certain magnification and a shading cylinder.
8. The system for testing the robust optical resolution and dynamic range of an automatically gated image intensifier of claim 1, wherein: the detection component arranged in the detection module (9) is a CMOS detection component or a signal-to-noise ratio detection component or a brightness detection component.
9. A method for testing the high light resolution by using an automatic gate control image intensifier high light resolution test system is characterized by comprising the following steps: the method comprises the following steps:
a1: the power supply module (11) is electrified, the light source (2) is preheated for 20min, the neutral optical filter assembly (3) is adjusted, and the distance illumination corresponding to the cathode surface of the automatic gate control image intensifier to be detected is 102lx-grade intense light;
a2: placing the automatic door control image intensifier on a clamp arranged in a dark box (7), reliably connecting the automatic door control image intensifier with a power supply interface of a power supply module (11), and closing the dark box (7);
a3: a CMOS detection component is placed on the detection module (9), the CMOS detection component is reliably connected with the eyepiece component module (8) and the industrial personal computer (10), and a resolution test target plate is selected as the optical component module (5);
a4: the industrial personal computer (10) controls the CMOS detection assembly to collect the clear image of the resolution test target plate output by the fluorescent screen of the automatic gate control image intensifier at the moment, and the image is compared and identified to obtain the strong light resolution of the automatic gate control image intensifier.
10. A method for testing dynamic range using an automatic gated image intensifier dynamic range test system, characterized by: setting the typical minimum imaging illumination intensity of the automatic gate control image intensifier to be tested as Imin0Typical maximum imaging illumination is Imax0(ii) a The index requirements of the qualified automatic gate control image intensifier are as follows: SNR is greater than or equal to SNRmin，SNRminThe minimum signal-to-noise ratio required by the automatic gate control image intensifier when the automatic gate control image intensifier works normally; resolution R is greater than or equal to Rmin，RminThe minimum resolution required by the automatic gate control image intensifier when the automatic gate control image intensifier works normally; average brightness B ∈ [ (1-a) Bs，(1+a)Bs]A is a constant determined according to the test requirements of the automatic gate control image intensifier to be tested, BsCalibrating the brightness value for the fluorescent screen; the specific test comprises the following steps:
b: testing the lowest imaging illumination intensity of the automatic gate control image intensifier;
b1: the power module (11) is powered on, the light source (2) is preheated for 20min, and the optical assembly contained in the test system is adjusted, so that the test system can clearly image;
b2: adjusting the neutral filter component (3) to obtain the illumination intensity I at the distance corresponding to the cathode surface of the automatic gate control image intensifier to be detectedmin0The weak light of (2);
b3: placing the automatic door control image intensifier on a clamp arranged in a dark box (7), reliably connecting the automatic door control image intensifier with a power supply interface of a power supply module (11), and closing the dark box (7);
b4: a CMOS detection component is placed on the detection module (9), the CMOS detection component is reliably connected with the eyepiece component module (8) and the industrial personal computer (10), and a resolution test target plate is selected as the optical component module (5);
b5: the industrial personal computer (10) controls the CMOS detection assembly to collect a clear image of the resolution test target plate at the moment, and the image is compared and identified to obtain the resolution R of the automatic gate control image intensifier under the current illumination conditionL0；
B6: a signal-to-noise ratio component is placed on the detection module (9), the signal-to-noise ratio detection component is reliably connected with the objective lens component module (8) and the industrial personal computer (10), a pinhole diaphragm is selected as the optical component module (5), and the current signal-to-noise ratio SNR is obtained through testingL0；
B7: a brightness detection assembly is arranged on the detection module (9), the brightness detection assembly is reliably connected with the eyepiece assembly module (8) and the industrial personal computer (10), meanwhile, frosted glass is selected as the optical assembly module (5), and the current brightness B is obtained through testingL0；
B8: r obtained by the test of the stepsL0、SNRL0、BL0The belt-in type (1),
judgment of RL0、SNRL0、BL0If the formula (1) is satisfied, the neutral density filter component (3) is adjusted to adjust the incident light to a lower distance illumination intensity Imin1And repeating the steps B3-B7 until the resolution, the signal-to-noise ratio and the brightness obtained by the test just do not satisfy the formula (1), and the current illumination is Iminn+1Then record IminnIs the lowest imaging illumination; if not, adjusting the neutral optical filter component (3), increasing the distance illumination of the incident light, and repeating the steps B3-B7 until the resolution, the signal-to-noise ratio and the brightness just meet the formula (1) and the corresponding illumination I is obtainedminnIs the lowest imaging illumination;
c: testing the highest imaging illumination of the automatic gate control image intensifier;
c1: the power module (11) is powered on, the light source (2) is preheated for 20min, and the optical assembly contained in the test system is adjusted, so that the test system can clearly image;
c2: adjusting the neutral filter component (3) to obtain the illumination intensity I at the distance corresponding to the cathode surface of the automatic gate control image intensifier to be detectedmax0Strong light of (2);
c3: placing the automatic door control image intensifier on a clamp arranged in a dark box (7), reliably connecting the automatic door control image intensifier with a power supply interface of a power supply module (11), and closing the dark box (7);
c4: a CMOS detection component is placed on the detection module (9), the CMOS detection component is reliably connected with the eyepiece component module (8) and the industrial personal computer (10), and a resolution test target plate is selected as the optical component module (5);
c5: the industrial personal computer (10) controls the CMOS detection assembly to collect a clear image of the resolution test target plate at the moment, and the image is compared and identified to obtain the resolution of the automatic gate control image intensifier under the current illumination conditionForce RH0；
C6: a signal-to-noise ratio component is placed on the detection module (9), the signal-to-noise ratio detection component is reliably connected with the objective lens component module (8) and the industrial personal computer (10), a pinhole diaphragm is selected as the optical component module (5), and the current signal-to-noise ratio SNR is obtained through testingH0；
C7: a brightness detection assembly is arranged on the detection module (9), the brightness detection assembly is reliably connected with the eyepiece assembly module (8) and the industrial personal computer (10), meanwhile, frosted glass is selected as the optical assembly module (5), and the current brightness B is obtained through testingH0；
C8: r obtained by the test of the stepsH0、SNRH0、BH0The belt-in type (2),
judgment of RH0、SNRH0、BH0If the formula (2) is satisfied, the neutral density filter assembly (3) is adjusted to adjust the incident light to a higher illuminance Imax1And repeating the steps C3-C7 until the resolution, the signal-to-noise ratio and the brightness obtained by the test just do not satisfy the formula (2), and the current illumination is Imaxn+1Then record ImaxnThe highest imaging illumination intensity; if not, adjusting the neutral optical filter component (3), reducing the illumination intensity of the incident light, and repeating the steps C3-C7 until the resolution, the signal-to-noise ratio and the brightness just meet the formula (2) and the corresponding illumination intensity I is obtainedmaxnThe highest imaging illumination intensity;
D. the lowest imaging illumination intensity I of the automatic gate control image intensifier obtained in the step BminnAnd step C, obtaining the highest imaging illumination I of the automatic gating image intensifiermaxnCarry-in (3), resulting in the dynamic range of the automatically gated image intensifier:
HDR＝20lg(Imaxn/Iminn) (3)。
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