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System and method for testing influence of vacuum plume on infrared laser characteristics

An infrared laser, testing system technology, used in testing optical performance and other directions

Active Publication Date: 2011-09-14
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] This patent aims at the problem that the rocket plume field may cause the laser ranging sensor and the laser radar sensor to work, and proposes a test system and test method for the influence of the rocket plume field on the infrared laser transmission characteristics in a vacuum environment, and evaluates the plume The impact of field on infrared laser energy attenuation, pointing deflection, and beam quality can be improved in the laser sensor design to avoid its impact on the safe landing of the lander

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  • System and method for testing influence of vacuum plume on infrared laser characteristics
  • System and method for testing influence of vacuum plume on infrared laser characteristics

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Embodiment Construction

[0007] The principle of this patent is as figure 1 As shown, the rocket motor 2 is fixedly installed in the vacuum tank 1, and the engine plume 9 can be continuously sucked away by the collecting cover 10 to ensure the vacuum degree of the vacuum tank. There are observation windows 3 on both sides of the vacuum tank. The center height of the observation windows is equal to the central axis of the engine plume. The 1064nm continuous infrared laser 12 and the 532nm aiming laser 13 are fixed and installed on the bracket 14 outside the vacuum tank in parallel. The camera 6 is fixedly placed on the other side outside the vacuum tank, and is connected with the computer 8 through the video image acquisition card 7 . Before the rocket engine is ignited, turn on the 532nm aiming laser for aiming, and then turn on the 1064nm continuous laser, so that its infrared beam passes through the observation window and the central axis of the engine plume area and is received by the infrared area...

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Abstract

The invention discloses a system and a method for testing the influence of a rocket engine vacuum plume under vacuum environment on infrared laser characteristics. The method comprises the following steps of: acquiring infrared laser spot images before and after rocket engine ignition under the vacuum environment by adopting an infrared area array camera combined with an optical attenuation plateand a narrow-band optical filter; and analyzing laser energy attenuation, orientation deflection and light beam quality deterioration caused by the plume by adopting a method for performing video image processing frame by frame off-line so as to comprehensively estimate the influence of the rocket plume under the vacuum environment on the infrared laser transmission characteristics.

Description

technical field [0001] This patent relates to photoelectric detection technology, and specifically refers to a test system and method for the influence of vacuum plume field on infrared laser characteristics. It is used to test the influence of small thrust rocket engine plume field below 150 Newton on infrared laser characteristics under vacuum conditions. . Background technique [0002] In deep space exploration, the laser ranging sensor and lidar sensor on the planetary lander are important test equipment to ensure its smooth landing. The transmission path of the infrared laser emitted by them is located near the rocket booster. Due to the combustion of the rocket engine, a plume field is formed in the laser transmission path, which will cause the change of the propagation direction of the laser beam, the attenuation of the laser energy and the impact on the quality of the laser beam. Influence, thereby affecting the distance between the lander and the planet and the mea...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
Inventor 万雄舒嵘黄庚华王建宇
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI