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Compensation filter device in multi-sequence laser shadow photography

A technology for compensating filter devices and laser shadows. It is applied to filters for photography, cameras, optics, etc. to improve imaging uniformity, achieve uniformity, and eliminate interference fringes.

Active Publication Date: 2018-10-02
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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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a device that realizes 2-8 sequential imaging of ultra-high-speed target change processes, and solves the problems of imaging spot uniformity and stray light filtering in the sequence imaging of ultra-high-speed target change processes

Method used

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  • Compensation filter device in multi-sequence laser shadow photography
  • Compensation filter device in multi-sequence laser shadow photography
  • Compensation filter device in multi-sequence laser shadow photography

Examples

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Embodiment 1

[0024] The layout of the compensation filter device in the sequential imaging optical path is as follows: image 3 As shown, the beam (901) coming out of the collimation system (10) in the multi-sequence laser shadow imaging is split into the first sequence beam (903) and the second sequence beam (904) by the first beam splitter (601) , first place the first collimating mirror (701) in the first sequence of light beams (903), and then place the first compensation filter device (101) and the first imaging CCD (801). The second sequence beam (904) is divided into the third sequence beam (905) and the fourth sequence beam (902) by the second beam splitter (902), and the second collimator is placed first in the third sequence beam (905). mirror (702), and then place the second compensation filter device (102) and the second imaging CCD (802).

[0025] Wherein, the positions of the compensating filter devices in the other sequences of light beams are similar to those of the first ...

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Abstract

The invention belongs to the field of ultra-high-speed transient imaging, and relates to a compensation filter device in multi-sequence laser shadow photography. The optical aperture of the sheet is 25mm, the material is BK7, and the optical density ranges from 0.08 to 2.0 at 532nm; the focal length of the imaging objective lens is 118mm, and the optical aperture is 25mm; the optical filter aperture is 25.4mm, the central wavelength is 532nm, and the bandwidth is The diameter is 10nm, the thickness is 1.5mm, and the transmittance is 75% at normal incidence. The filter is placed at an angle of 10° to 30° perpendicular to the optical axis. The optical filter of the present invention is placed behind the imaging objective lens to eliminate stray light generated in the optical path, and the optical filter is placed at an angle of 10° to 30° perpendicular to the optical axis direction, which can eliminate interference fringes in the optical path and improve imaging uniformity.

Description

technical field [0001] The invention belongs to the field of ultra-high-speed transient imaging, and in particular relates to a compensation filter device in multi-sequence 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 seq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B39/00G03B11/00G02B1/00G02B1/14G02B1/11
CPCG03B11/00G03B39/00G02B1/00G02B1/11
Inventor 谢爱民黄洁宋强文雪忠柯发伟李晶姜林柳森
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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