CN-120628556-B - Experimental device capable of measuring imaging quality and laser damage threshold of optical system

CN120628556BCN 120628556 BCN120628556 BCN 120628556BCN-120628556-B

Abstract

The application discloses an experimental device capable of measuring imaging quality and laser damage threshold of an optical system, and relates to the technical field of optical systems, wherein a first diaphragm and a second diaphragm are used for collimating an optical path and limiting the size of a light spot entering an attenuation imaging-energy detection system; the first diaphragm and the second diaphragm are matched with the reflector group in a cooperative manner to realize adjustment of the light path, the second diaphragm limits the size of the light spot incident to the dual detection system, and the attenuation imaging-energy detection system acquires the energy and imaging effect of the laser beam output by the second diaphragm. The application effectively expands the dimension of the adjustment of the optical path and is easier to adjust and collimate the optical path by matching the diaphragm component and the reflecting mirror component, can realize the point spread function measurement of the optical system under different distances in a limited experimental field by the attenuation sheet and the reflecting mirror component, and can finish the test of the laser damage threshold of the optical system without changing the optical path.

Inventors

YE QING
LIU YE
SUN WEIBING
ZHANG JUNYU
WU YUNLONG
BIAN JINTIAN
LIU AIBING

Assignees

中国人民解放军国防科技大学

Dates

Publication Date: 20260505
Application Date: 20250627

Claims (3)

1. An experimental device capable of measuring imaging quality and laser damage threshold of an optical system is characterized by comprising a laser source, a first diaphragm, a reflecting mirror component, a second diaphragm and an attenuated imaging-energy detection system which are sequentially arranged along an optical path; the laser source is used for emitting laser beams and is used as a light source for experiments; the first diaphragm is used for outputting the laser beam output by the laser source to the reflecting mirror component; The reflecting mirror component is used for reflecting the laser beam output by the first diaphragm to the second diaphragm; The mirror assembly includes a first mirror and a second mirror; the first reflecting mirror is used for reflecting the laser beam output by the first diaphragm to the second reflecting mirror; the second reflecting mirror is used for reflecting the laser beam output by the first reflecting mirror to the second diaphragm; The second diaphragm is used for outputting the laser beam output by the reflecting mirror assembly to the attenuation imaging-energy detection system; The first diaphragm and the second diaphragm are used for collimating an optical path and limiting the size of a light spot entering the attenuation imaging-energy detection system, and are matched with the reflector group to realize the adjustment of the optical path; The attenuation imaging-energy detection system is used for acquiring the energy and imaging effect of the laser beam output by the second diaphragm; the attenuation imaging-energy detection system comprises a beam splitter, an imaging light path component and an energy acquisition component; the beam splitter is used for splitting the laser beam output by the second diaphragm into a transmission beam and a reflection beam; The imaging light path component is used for receiving the transmitted light beam and obtaining a damage threshold or an imaging effect on the surface of the detector; The energy acquisition component is used for acquiring the energy of the reflected light beam; the imaging light path component comprises an attenuation sheet, an imaging lens and a CMOS sensor which are arranged along a light path; the attenuation sheet is used for carrying out energy attenuation on the laser beam and outputting the laser beam subjected to energy attenuation to the imaging lens and the CMOS sensor; the energy harvesting assembly includes a lens and an energy meter disposed along an optical path; the experimental device capable of measuring the imaging quality of the optical system and the laser damage threshold can realize the measurement of the imaging performance and the laser damage capability of different optical systems at different distances in a limited experimental field by adjusting the positions of a plurality of reflecting mirrors in the reflecting mirror assembly; The experimental device capable of measuring the imaging quality and the laser damage threshold of the optical system switches the measurement of the point spread function of the optical system and the test of the laser damage performance by changing the number of the attenuation sheets, wherein the incident laser energy is controlled to be unchanged, the point spread function of the optical system can be measured when the attenuation degree of the attenuation sheets is increased, and the laser damage threshold of different optical systems can be measured by reducing the attenuation degree of the attenuation sheets to the incident energy.
2. The experimental apparatus for measuring imaging quality and laser damage threshold of an optical system of claim 1, wherein the laser source emits a laser beam parallel to the ground.
3. The experimental device capable of measuring imaging quality and laser damage threshold of an optical system according to claim 1, wherein an included angle between the first reflecting mirror and a laser beam emitted by the laser source is 45 degrees; The included angle between the second reflecting mirror and the laser beam output by the first reflecting mirror is 45 degrees.

Description

Experimental device capable of measuring imaging quality and laser damage threshold of optical system Technical Field The application relates to the technical field of optical systems, in particular to an experimental device capable of measuring imaging quality and laser damage threshold of an optical system. Background The photoelectric imaging system has the advantages of high spatial resolution, real-time imaging capability, simple and reliable structure and the like, and is widely applied to a plurality of fields such as scientific research, industry, daily life, national security and the like. To ensure imaging quality, conventional optoelectronic imaging systems typically place the image sensor near the optical focal plane. However, since the optical gain of this region is extremely high, the laser damage threshold of the conventional photoelectric imaging system is relatively low and is susceptible to laser damage. In the optical system, the surface processing precision and the imaging caliber of the optical element can limit the imaging effect, so that problems such as aberration and high-frequency cutoff occur in the imaging process. In addition, factors such as the pixel size, spacing, and the nature of the photosensitive material of the image detector can also have a significant impact on imaging resolution, signal sampling density, and image signal-to-noise ratio. To fully characterize these influencing factors, a point spread function (Point Spread Function, PSF) was introduced as a comprehensive tool describing the imaging process. The point spread function describes the response of the point light source at the target on the imaging plane, reflects the analysis capability of the optical system to the point light source, and is a key index for measuring the imaging performance of the optical system. With the continuous development of high-energy high-power laser source technology and the wide application of the high-energy high-power laser source technology in various fields, the risk of laser damage to an optical system is increasing. In this context, the laser damage threshold becomes an important technical parameter for evaluating the damage resistance of an optical system. The invention aims to provide a device capable of simultaneously measuring a point spread function and a laser damage threshold of an optical system so as to comprehensively evaluate the imaging quality and damage resistance of the optical system. Disclosure of Invention The application aims to provide an experimental device capable of measuring imaging quality and laser damage threshold of an optical system, which can be used for measuring the imaging quality of the optical system and the laser damage threshold of the optical system. In order to achieve the above object, the present application provides the following solutions: The application provides an experimental device capable of measuring imaging quality and laser damage threshold of an optical system, which comprises a laser source, a first diaphragm, a reflecting mirror component, a second diaphragm and an attenuation imaging-energy detection system, wherein the laser source, the first diaphragm, the reflecting mirror component, the second diaphragm and the attenuation imaging-energy detection system are sequentially arranged along an optical path; the laser source is used for emitting laser beams and is used as a light source for experiments; the first diaphragm is used for outputting the laser beam output by the laser source to the reflecting mirror component; The reflecting mirror component is used for reflecting the laser beam output by the first diaphragm to the second diaphragm; The second diaphragm is used for outputting the laser beam output by the reflecting mirror assembly to the attenuation imaging-energy detection system; The first diaphragm and the second diaphragm are used for collimating an optical path and limiting the size of a light spot entering the attenuation imaging-energy detection system, and are matched with the reflector group to realize the adjustment of the optical path; the attenuation imaging-energy detection system is used for acquiring the energy and imaging effect of the laser beam output by the second diaphragm. According to the specific embodiment provided by the application, the application discloses the following technical effects: the application provides an experimental device capable of measuring imaging quality and laser damage threshold of an optical system, which is designed to measure the point spread function and the laser damage threshold of the optical system by considering two dimensions of the imaging quality and the laser damage performance of the optical system, and the effectiveness and the reliability of the device are verified through experiments. Drawings In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed i