Laser focusing irradiation experiment device and method for liquid nitrogen refrigeration type infrared focal plane array
An infrared focal plane and focused irradiation technology, which is applied in the field of laser focused irradiation experimental devices and can solve problems such as small focused spots
Inactive Publication Date: 2020-08-11
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology
[0009] The purpose of the present invention is to solve the technical problem that it is difficult to form a focused spot with small enough spot diameter and precise and controllable light field distribution on the surface of the infrared focal plane array in the existing laser focused irradiation experimental device and method, and to provide a liquid nitrogen cooling type Infrared focal plane array laser focused irradiation experiment device and method
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[0066] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0067] The present invention provides a laser focus irradiation experimental device for liquid nitrogen cooling type infrared focal plane array, such as figure 2 As shown, its composition includes: a fiber laser 1 outputting laser light through a single-mode fiber; The output ends of the variable attenuator 2 are connected to each other through standard optical fiber connectors, and the input laser power is divided into two by a fixed ratio. The optical fiber beam splitter 3 output, the optical fiber variable attenuator 2 can achieve a large irradiated laser power The range is continuously adjusted, the controllable focus irradiation module 5 connected to one output end of the optical fiber beam splitter 3 through a standard optical fiber connector, and the Dewar bottle 7 connected to the controllable focus irradiation module 5 through vacuum sealing, ...
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Abstract
The invention relates to a laser irradiation effect experiment device and method, in particular to a laser focusing irradiation experiment device and method for a liquid nitrogen refrigeration type infrared focal plane array. The invention provides a liquid nitrogen refrigeration type infrared focal plane array laser focusing irradiation experiment device and method to solve the problem that it isdifficult to form focusing light spots with the light spot diameter being small enough and light field distribution being accurate and controllable on the surface of an infrared focal plane array inan existing laser focusing irradiation experiment device and method. The device comprises an optical fiber laser, an optical fiber variable attenuator and an optical fiber beam splitter which are connected in sequence, wherein a laser power meter and a controllable focusing irradiation module are connected to a Dewar flask in a vacuum sealing manner; two ends of a single-mode optical fiber of thecontrollable focusing irradiation module are respectively positioned on the inner and outer sides of the Dewar flask; the light beam focusing structure is installed at the tail end of the optical fiber, and the distance between the light beam focusing structure and the infrared focal plane array is 5-15 mm. The focal length of the light beam focusing structure is 5-15 mm, and the axial adjusting range of the mechanical adjusting mechanism is 0-25 mm. The method is carried out by using the device.
Description
technical field [0001] The invention relates to a laser irradiation effect experimental device and method, in particular to a laser focused irradiation experimental device and method for a liquid nitrogen cooling infrared focal plane array. Background technique [0002] Infrared focal plane array is the image sensor of infrared imaging system. The research on the laser irradiation effect of infrared focal plane array can further reveal the response behavior and mechanism of infrared imaging system to strong light, which is of great significance for promoting the development of infrared device technology, and is also one of the research hotspots in the field of laser-matter interaction. one. [0003] Laser irradiation experiment is a main means of laser irradiation effect research, specifically: irradiating the laser beam that meets certain requirements on the surface of the experimental sample, and then obtaining the effect parameters of the experimental sample through meas...
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IPC IPC(8): G01J5/00G01J5/02G01J1/00G01N1/44G01M11/00
CPCG01J5/00G01J5/02G01J1/00G01N1/44G01M11/00
Inventor 徐作冬张检民窦鹏程冯国斌
Owner NORTHWEST INST OF NUCLEAR TECH