CN112577712A - System and method for testing qualification of strong light source protection function of image intensifier - Google Patents
System and method for testing qualification of strong light source protection function of image intensifier Download PDFInfo
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Abstract
The invention discloses a system and a method for testing the qualification of a strong light source protection function of an image intensifier. The device consists of a light source, a neutral optical filter component, a shading cylinder, a lens, an image intensifier, a microscope, a detector and a power supply. The test method comprises the following steps: 1) focusing under weak light through microscope observation to obtain 1mm on the anode panel2Light spots; 2) replacing the microscope with a detector to acquire an anode panel image; 4) turning off the power supply of the image intensifier, and adjusting the light source to make the illumination on the cathode surface L; 5) electrifying the image intensifier again, and keeping irradiating for 60 seconds; 6) adjusting the light source to a small illumination L1, collecting and calculating the average value I of the gray scale of other pixel areas except the dark spot0Calculating the average value of dark spot gray scale as I1(ii) a 7) Standing the image intensifier for 4 hours or more than 8 hours according to different requirements, and calculating the gray average value I of the dark spots under the same illumination2Or I3If I is2Or I3And if the requirements of the conditions are met, the protection function is qualified.
Description
Technical Field
The invention relates to the field of image intensifiers, in particular to a system and a method for testing the qualification of a strong light source protection function of an image intensifier.
Background
The image intensifier needs to face complex environment illumination in the using process, and the problems of shortened service life of the microchannel plate, decline of cathode sensitivity and the like can be caused when the image intensifier works under a strong light source for a long time, so that the image intensifier is required to have a strong light source protection function. Therefore, how to efficiently and reliably judge whether the protection function of the strong light source of the image intensifier reaches the standard becomes an important problem to be solved urgently.
The evaluation means of the strong light source protection function of the current image intensifier is mainly as follows: focusing on the image intensifier anode panel to obtain 1mm2And then, irradiating the light spot for 60 seconds by using a light source with the illumination intensity of 203lx, observing the dark spot on the photocathode surface, and observing the fading degree of the dark spot by human eyes after the light spot is placed for 24 hours, thereby obtaining the conclusion whether the strong light source protection function of the image intensifier is qualified. This approach has the following problems:
(1) one test period is 24 hours, and the efficiency is low because the image intensifier does not perform other tests in the test time period in order to ensure the test accuracy;
(2) after the test piece is placed for 24 hours, whether the test piece is qualified is judged by a mode of observing with human eyes, and the possibility of inaccurate test results caused by subjective factors exists.
Disclosure of Invention
The invention aims to provide a system and a method for testing the qualification of the strong light source protection function of an image intensifier.
The test system consists of a light source, a neutral optical filter component, a shading cylinder, a lens, a microscope, a detector and a power supply, wherein the microscope is replaced by the detector according to the requirement of a test stage; wherein: the optical axis centers of the light source, the neutral optical filter component, the shading cylinder, the lens, the image intensifier and the microscope/detecting instrument are positioned on the same horizontal straight line and are sequentially placed onThe same fixed optical platform guide rail is used for ensuring that the centers of the fixed optical platform guide rail and the fixed optical platform guide rail are positioned on the same optical axis; the detector is a CMOS detector and is used for collecting images of the anode panel; the power supply is electrically connected with the light source and the image intensifier; the power supply also has the function of automatically controlling the on-off time of the light source; the light shielding cylinder irradiates the light which is transmitted through the optical filter component to the lens through the light shielding cylinder; the lens converges the light provided by the shading cylinder into 1mm2The light spot is irradiated on the cathode panel of the image intensifier; the cathode of the image intensifier is placed on the fixed optical platform guide rail facing the concave lens; the microscope is used for auxiliary focusing, so that 1mm can be obtained on the anode panel of the image intensifier2A light spot.
Further, the light source adopts a standard A light source with a color temperature of 2856K or an LED light source with an adjustable color temperature.
Further, the neutral density filter assembly is composed of a plurality of sets of filters arranged in parallel, and the number of the sets of filters can be determined according to the intensity of light required to be obtained.
A method for testing the qualification of the protection function of an image intensifier strong light source comprises the following steps:
(1) turning on a power supply, and turning on a light source to preheat for more than 15 min;
(2) electrifying the image intensifier, observing by a microscope, and focusing under weak light to obtain 1mm on the anode panel of the image intensifier2Light spots;
(3) replacing the microscope with a detector, and focusing the microscope on the anode panel of the image intensifier;
(4) turning off the power supply of the image intensifier, and adjusting the light source to make the illumination of the cathode surface of the image intensifier 203 lx;
(5) electrifying the image intensifier again, and automatically controlling the light source switch by the power supply to enable the illumination intensity to keep irradiating for 60 seconds;
(6) adjusting the light source to a low illumination L1, collecting the image of the anode panel of the image intensifier at the moment by a detector, and calculating to 1mm2The average value of the gray scales of other pixel areas except the dark spots is I0Calculate 1mm2Mean value of dark spot gray scale is recorded as I1；
(7) Will likeStanding the intensifier for more than 4 hours under the condition of the same illumination L1, collecting the image of the anode panel of the image intensifier by a detector, and calculating to be 1mm2Mean value of dark spot gray scale is recorded as I2；
In the formula: k is a radical of1>k2And k is1、k2Are all more than or equal to 1;
(8) if the formula (1) is met, the strong light source protection function of the image intensifier is qualified, and the image intensifier product can continue to flow to other procedures; otherwise, turning to the step (9);
(9) standing the image intensifier for more than 8 hours under the condition of the same illumination L1, collecting the image of the anode panel of the image intensifier by a detector, and calculating to be 1mm2Mean value of dark spot gray scale is recorded as I3；
In the formula: k is a radical of1>k2>k3And k is1、k2And k3Are all more than or equal to 1;
if the formula (2) is satisfied, the strong light source protection function of the image intensifier is considered to be qualified, otherwise, the image intensifier is directly scrapped.
Further, k is1The value 8, k2The value 3, k3The value is 1.2.
Drawings
FIG. 1 is a schematic structural diagram of an image intensifier strong light source protection function qualification testing system according to the present invention.
Reference numerals and brief description in the drawings:
1-light source. A standard A light source with the color temperature of 2856K or an LED light source with the adjustable color temperature is adopted.
2-neutral filter assembly. Consists of x sets of filters, and the proper filter component is selected according to the requirement to obtain the required light.
3-shading cylinder. The light after the optical filter assembly is irradiated to the lens through the light shielding tube.
4-a lens. The light provided by the shading tube is converged into 1mm2Is illuminated onto the image intensifier cathode panel.
5-image intensifier. The cathode was placed on the test stand facing the concave lens.
6-microscope. Auxiliary focusing makes 1mm on the anode panel of the image intensifier2A light spot.
7-a detector. A CMOS detector.
8-power supply. Providing a stable power supply for the light source and the image intensifier; in addition, the power module also has the function of automatically controlling the on-off time of the light source.
Detailed Description
As shown in fig. 1, a system for testing the qualification of the strong light source protection function of an image intensifier comprises a light source 1, a neutral filter assembly 2, a shading cylinder 3, a lens 4, an image intensifier 5, a microscope 6, a detector 7 and a power supply 8; wherein: the centers of the light source 1, the neutral filter assembly 2, the shading cylinder 3, the lens 4, the image intensifier 5 and the detector 6 are positioned on the same horizontal plane and are sequentially placed on the same fixed optical platform guide rail so as to ensure that the centers of the light source 1, the neutral filter assembly 2, the shading cylinder 3, the lens 4, the image intensifier 5 and the detector 6 are positioned on the same optical axis.
The light source 1 adopts a standard A light source with color temperature of 2856K or an LED light source with adjustable color temperature.
The neutral filter assembly 2 is composed of 3 sets of filters arranged in parallel.
The light-shielding tube 3 irradiates the light after the optical filter assembly 2 onto the lens 4 through the light-shielding tube 3.
The lens 4 converges the light provided by the shading cylinder 3 into 1mm2Is illuminated onto the cathode panel of the image intensifier 5.
The cathode of the image intensifier 5 is placed on the fixed optical stage guide rail facing the concave lens.
The microscope 6 assists focusing so that 1mm can be obtained on the anode panel of the image intensifier 52A light spot.
The detector 7 is a CMOS detector and is configured to collect an image of the anode panel.
The power supply 8 can provide stable power supply for the light source 1 and the image intensifier 5; the power supply 8 also has a function of automatically controlling the on/off time of the light source 1.
The invention relates to a method for testing the strong light source protection function of an image intensifier, which mainly comprises the following steps:
(1) turning on a switch of a power supply 8, and turning on the light source 1 for preheating for 15 minutes;
(2) electrifying the image intensifier 5, observing by a microscope 6, and focusing under weak light condition to obtain 1mm on the anode panel of the image intensifier 52Light spots;
(3) replacing the microscope 6 with a detector 7(CMOS detector) focusing on the image intensifier 5 anode panel;
(4) turning off the power supply of the image intensifier 5, and adjusting the light source 1 to make the illumination irradiated on the cathode surface of the image intensifier 5 be 203 lx;
(5) electrifying the image intensifier 5 again, and automatically controlling the switch of the light source 1 by the power supply 8 to enable the 203lx irradiation time to be 60 seconds;
(6) adjusting the light source 1 to a lower illumination L1, collecting the image of the anode panel of the image intensifier 5 through the detector 7, and calculating to 1mm2The average value of the gray scales of other pixel areas except the dark spots is I0Calculate 1mm2Mean value of dark spot gray scale is recorded as I1；
(7) Standing the image intensifier 5 for 4 hr, collecting the image of the anode panel of the image intensifier 5 with a detector 7 under the same illumination L1, and calculating to obtain a 1mm image2Mean value of dark spot gray scale is recorded as I2；
In the formula: k is a radical of1>k2And k is1、k2Are all greater than or equal to 1, e.g. specific value k1＝8、k2＝3。
If the formula (1) is satisfied, the strong light source protection function of the image intensifier 5 is qualified, and the product of the image intensifier 5 can be continuously transferred to other procedures; otherwise, the step (8) is carried out.
(8) Standing the image intensifier 5 for 8 hours, collecting the image of the anode panel of the image intensifier 5 by a detector 7 under the same illumination L1, and calculating to obtain a 1mm image2Mean value of dark spot gray scale is recorded as I3；
In the formula: k is a radical of1>k2>k3And k is1、k2And k3Are all more than or equal to 1; for example the specific value k1＝8、k2＝3、k3＝1.2。
If the formula (2) is satisfied, the strong light source protection function of the image intensifier 5 is qualified, otherwise, the image intensifier is directly scrapped.
Claims (5)
1. A method for testing the qualification of the protection function of an image intensifier strong light source is characterized by comprising the following steps:
step 1, building a test system
The testing system consists of a light source (1), a neutral optical filter component (2), a shading cylinder (3), a lens (4), an image intensifier (5), a microscope (6)/a detector (7) and a power supply (8), wherein the microscope (6) is replaced by the detector (7) according to the requirement of a testing stage;
wherein: the centers of the optical axes of the light source (1), the neutral optical filter component (2), the shading cylinder (3), the lens (4) and the image intensifier (5)/microscope (6) are positioned on the same horizontal straight line and are sequentially placed on the same fixed optical platform guide rail so as to ensure that the centers of the light source (1), the neutral optical filter component (2), the shading cylinder (3), the lens (4) and the image intensifier (5)/microscope are positioned on the same optical axis;
the detector (7) is a CMOS detector and is used for collecting images of the anode panel of the image intensifier; the power supply (8) is electrically connected with the light source (1) and the image intensifier (5); the power supply (8) also has the function of automatically controlling the switching time of the light source (1);
the light-shielding cylinder (3) irradiates the light which is transmitted through the optical filter component (2) to the lens (4) through the light-shielding cylinder (3); the lens (4) collects the light provided by the shading cylinder (3)Polymerized to 1mm2The light spot of (2) is irradiated to the cathode panel of the image intensifier (5); the cathode of the image intensifier (5) faces the concave lens and is placed on the fixed optical platform guide rail; the microscope (6) is used for focusing assistance, so that 1mm can be obtained on the anode panel of the image intensifier (5)2Light spots;
step 2, test preparation
Step 2.1, turning on a power supply (8), and turning on a light source (1) for preheating;
step 2.2, electrifying the image intensifier (5), observing through a microscope (6) and focusing under the weak light condition to enable the image intensifier (5) to obtain 1mm on the anode panel2Light spots;
step 3, start the test
3.1, replacing the microscope (6) with a detector (7) and focusing the detector on the anode panel of the image intensifier (5);
step 3.2, the power supply of the image intensifier (5) is disconnected, and the light source (1) is adjusted to enable the illuminance of the light irradiated on the cathode surface of the image intensifier (5) to be illuminance L;
step 3.3, the image intensifier (5) is powered up again, and the power supply (8) automatically controls the switch of the light source (1) to enable the illumination intensity to keep irradiating for 60 seconds;
step 3.4, adjusting the light source (1) to an illumination L1 smaller than the illumination L, collecting the image of the anode panel of the image intensifier (5) through the detector (7), and calculating the image to be 1mm2The average value of the gray scales of other pixel areas except the dark spots is I0Calculate 1mm2Mean value of dark spot gray scale is recorded as I1；
Step 3.5, standing the image intensifier (5) for more than 4 hours, collecting the image of the anode panel of the image intensifier (5) through a detector (7) under the condition of the same illumination L1, and calculating to be 1mm2Mean value of dark spot gray scale is recorded as I2；
In the formula: k is a radical of1>k2And k is1、k2Are all more than or equal to 1;
step 4, qualification judgment
Step 4.1, if the formula (1) is met, the strong light source protection function of the image intensifier (5) is considered to be qualified, and the product of the image intensifier (5) can be continuously transferred to other procedures; otherwise, turning to step 4.2;
step 4.2, standing the image intensifier (5) for more than 8 hours under the condition of the same illumination L1, collecting the image of the anode panel of the image intensifier (5) through a detector (7), and calculating to be 1mm2Mean value of dark spot gray scale is recorded as I3；
In the formula: k is a radical of1>k2>k3And k is1、k2And k3Are all more than or equal to 1;
if the formula (2) is satisfied, the strong light source protection function of the image intensifier (5) is qualified, otherwise, the image intensifier is directly scrapped.
2. The method for testing the qualification of the protection function of the strong light source of the image intensifier as claimed in claim 1, wherein:
the illumination L is 203lx, and the illumination L1 is 1x10-1lx。
3. The method for testing the qualification of the protection function of the strong light source of the image intensifier as claimed in claim 1, wherein:
k is1A value of 8, k2The value 3, k3The value is 1.2.
4. The method for testing the qualification of the protection function of the strong light source of the image intensifier as claimed in any one of the claims 1 to 3, wherein:
the light source (1) adopts a standard A light source with the color temperature of 2856K or an LED light source with the adjustable color temperature.
5. The method for testing the qualification of the protection function of the strong light source of the image intensifier as claimed in any one of the claims 1 to 3, wherein:
the neutral optical filter component (2) is formed by arranging a plurality of groups of optical filters in parallel.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375908A (en) * | 2021-05-26 | 2021-09-10 | 北方夜视技术股份有限公司 | Dark box system for automatic test of low-light-level image intensifier |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201116778D0 (en) * | 2011-09-29 | 2011-11-09 | Secr Defence | Bright source protection for image intensification devices |
| CN106370400A (en) * | 2016-11-25 | 2017-02-01 | 南京理工大学 | Integrated tester for low-light image intensifier and test method of tester |
| CN110346120A (en) * | 2019-08-05 | 2019-10-18 | 北方夜视技术股份有限公司 | The test macro and test method of a kind of strong optical resolution of automatic gate image intensifier and dynamic range |
| CN110784665A (en) * | 2019-08-22 | 2020-02-11 | 南京理工大学 | Local strong light protection method of image intensifier based on ICMOS image feedback |
-
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- 2020-12-08 CN CN202011442040.3A patent/CN112577712A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201116778D0 (en) * | 2011-09-29 | 2011-11-09 | Secr Defence | Bright source protection for image intensification devices |
| CN106370400A (en) * | 2016-11-25 | 2017-02-01 | 南京理工大学 | Integrated tester for low-light image intensifier and test method of tester |
| CN110346120A (en) * | 2019-08-05 | 2019-10-18 | 北方夜视技术股份有限公司 | The test macro and test method of a kind of strong optical resolution of automatic gate image intensifier and dynamic range |
| CN110784665A (en) * | 2019-08-22 | 2020-02-11 | 南京理工大学 | Local strong light protection method of image intensifier based on ICMOS image feedback |
Non-Patent Citations (4)
| Title |
|---|
| 国防科学技术工业委员会: "《三代微光像增强器规范》", 22 May 2007 * |
| 洪鸣等: "微光夜视设备强光防护阈值的试验方法探讨", 《红外技术》 * |
| 许正光等: "像增强器视场缺陷检测方法研究", 《应用光学》 * |
| 陈庆佑，王国敏: "二代像增强器疲劳与输入照度的关系", 《真空电子技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375908A (en) * | 2021-05-26 | 2021-09-10 | 北方夜视技术股份有限公司 | Dark box system for automatic test of low-light-level image intensifier |
| CN113375908B (en) * | 2021-05-26 | 2022-09-23 | 北方夜视技术股份有限公司 | Dark box system for automatic test of low-light-level image intensifier |
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