Sheet light energy homogenization optical shaping system based on total reflection integral cavity

Abstract

The invention discloses a sheet light energy homogenization optical shaping system based on a total reflection integral cavity, and relates to a sheet light energy homogenization optical shaping system. The optical lenses are sequentially arranged along the Gaussian beam propagation direction, the entrance pupil translation offset d is equal to 0.85 mm, the coupled optical lens group comprises a first plano-convex cylindrical lens and a second plano-convex cylindrical lens, the total reflection integral cavity consists of two light uniformizing plates and is plated with a high-reflection film, one light uniformizing plate is parallel to the Gaussian beam propagation direction, and the other light uniformizing plate forms an included angle of 0.1 degree with the Gaussian beam propagation direction. The collimation compression optical lens group comprises a first meniscus cylindrical mirror, a second meniscus cylindrical mirror, a first biconvex cylindrical mirror and a third plano-convex cylindrical mirror. The Gaussian beam can be converted into a sheet beam with uniform energy distribution, a high-quality and high-efficiency laser beam is provided for PLIF combustion diagnosis, and the complexity and processing cost of a PLIF system can be reduced.

Description

technical field [0001] The invention relates to a sheet light energy uniform optical shaping system, in particular to a sheet light energy uniform optical shaping system based on a total reflection integrating cavity, which belongs to the field of laser applied optics. Background technique [0002] Laser-induced fluorescence (LIF) technology is a hot research field in laser combustion diagnosis in recent years. Among them, planar laser-induced fluorescence (PLIF) technology can realize high-temporal-resolution and accurate measurement of combustion field temperature, composition and concentration, flame structure and other parameter information. And there is no disturbance to the combustion process during the measurement, which has important research significance and application value in the aspects of gas, solid propellant combustion dynamics, supersonic combustion dynamics, high-efficiency combustion of aero-engines and pollution control. [0003] In the quantitative PLIF ...

AI Technical Summary

Problems solved by technology

[0007] Compared with the prior art, the beneficial effect of the present invention is: the present invention greatly destroys the intensity distribution of the initial Gaussian beam by using the multiple reflection of the total reflection integrating cavity, and obtains uniform energy distribution and wide detection area at the exit end. The sheet-shaped beam, which is applied in PLIF laser combustion diagnosis technology, can provide high-quality and efficient laser beam for PLIF combustion diagnosis, so as to realize high-time-space resolution and accurate measurement of combustion field temperature, composition and concentration, flame structure and other parameter information, and improve The signal-to-noise ratio and measurement accuracy of signals in laser combustion diagnosis, compared with the current laser beam homogenization method, the invention has simple structure, easy processing, low cost, simplified optical path, and helps to reduce the complexity and processing cost of the PLIF system. The focal depth is long, and the homogenization effect of the flake beam is good, up to 92%, which is beneficial to solve the problems of low image quality and difficult quantification in PLIF combustion diagnosis, and improve the measurement accuracy

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