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Polarizing and beam-splitting apparatus for sequential laser shadowgraph

A polarization beam splitting device and laser shadow technology, applied in optics, photography, optical components, etc., can solve problems such as unfavorable multi-sequence imaging, achieve the effects of reducing circle diameter, improving coincidence, and reducing stray light

Active Publication Date: 2016-03-23
中国空气动力研究与发展中心超高速空气动力研究所
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Problems solved by technology

When the multi-sequence laser shadow photography system is imaging the test area, the information of the area that does not completely overlap will be lost when it is imaged in different sequences. Therefore, the smaller the overlap of the test area, the more the test information will be lost, which is not conducive to multi-sequence imaging

Method used

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  • Polarizing and beam-splitting apparatus for sequential laser shadowgraph
  • Polarizing and beam-splitting apparatus for sequential laser shadowgraph
  • Polarizing and beam-splitting apparatus for sequential laser shadowgraph

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Embodiment 1

[0020] Such as figure 1 As shown, the sequence of light beams emitted by the light source system 1 enters the multi-light source space separation device 3 through the optical fiber 2. The multi-light source space separation device 3 is equipped with a multi-light source space separation disc 5 at the front end, and the output ends of the multiple optical fibers are located on the multi-light source space separation disc. 5 and distributed evenly.

[0021] figure 2 It is an enlarged side view of the multi-light source space separation disc 5. The beams emitted from the output ends of multiple optical fibers are not expanded to form a plurality of focal spots 6. The larger the diameter of the circle occupied by each focal spot 6, the more favorable it is for multi-sequence lasers. The spectroscopic device of the imaging system in the shadow photography system splits light beams in different sequences, but the larger the diameter of the circle, the smaller the degree of coincid...

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Abstract

The invention belongs to the field of ultrahigh-speed transient imaging and relates to a polarizing and beam-splitting apparatus for sequential laser shadowgraph. The apparatus comprises a polarizing apparatus and a polarizing and beam-splitting device, wherein components of the polarizing apparatus include a polarizer and a polarizer barrel; and components of the polarizing and beam-splitting device include a polarizing film, a polarizing sleeve, first optical protective glass, second optical protective glass and a protective sleeve. According to the apparatus, a light principle that the polarizing film only can be transmitted and is consistent with a polarizing direction; polarizing characteristics of different sequential laser beams, emitted from a multi-light-source spatial separation apparatus, of a light source system in a multi-sequence laser shadowgraph system have disappeared; the polarizer is arranged in a focal spot position of the beams emitted from the multi-light-source spatial separation apparatus; a polarizing direction of the beams emitted from the polarizer is consistent with that of the polarizer; and angle differences of polarizing directions of polarizers arranged at different sequential light beams are 90 degrees.

Description

technical field [0001] The invention belongs to the field of ultra-high-speed transient imaging, and relates to a polarization beam splitting device for sequential laser shadow photography. Background technique [0002] With the development of my country's aerospace technology, weapons and equipment, and basic disciplines, research in the fields of ultra-high-speed aerodynamics, ultra-high-speed collisions, explosions and impacts, combustion and chemical reactions has continued to deepen. In these research works, many phenomena are ultra-high-speed transient change processes with a duration of only microseconds or even nanoseconds. It is necessary to have a camera system that can clearly and continuously image and record this process in order to grasp the physical phenomena. Nature. In addition to requiring the amplitude and frequency to reach 10 million frames per second (that is, the shortest exposure and imaging time is 100ns), this camera system can perform sequential i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B15/05G03B39/00G02B27/28
CPCG02B27/283G03B15/05G03B39/00
Inventor 谢爱民黄洁宋强文雪忠柯发伟李晶郑蕾柳森
Owner 中国空气动力研究与发展中心超高速空气动力研究所
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