Structure of compensation filter device in multi-sequence laser shadow photography

Abstract

The invention belongs to the field of ultra-high-speed transient imaging, and relates to a structure of a compensation filter device in multi-sequence laser shadow photography, including a main body sleeve, an imaging objective lens, a first gasket, an optical filter adjusting cylinder, an optical filter fixing cylinder, Filter, second washer, first protective window glass, first pressure ring, limit nail, locking screw, limit rod, third washer, second pressure ring, second pressure ring, fourth washer, density Graduated Filter, Second Protection Window Glass and Density Graduated Filter Adjustment Barrel. The present invention places protective window glass at the front and back ends of the compensation filter device, which can prevent dust from entering the surface of the optical element and the surface of the moisture-proof optical element from being damp; match.

Description

technical field [0001] The invention belongs to the field of ultra-high-speed transient imaging, and relates to a compensation filter device structure 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 sequent...

AI Technical Summary

Problems solved by technology

[0005] Since ultra-high-speed phenomena are often accompanied by strong self-illumination, these self-luminescence will interfere with the information of the test target, and placing a narrow-band filter for stray light filtering will produce undesired fringes in the optical path. It will also make the beam uneven and affect the imaging quality

In order to eliminate stray light and not affect the imaging quality, a compensation filter device is used in the imaging system of the camera system, but because the compensation filter device involves a variety of optical components, and the compensation filter device needs to be repeatedly checked before each use Debugging, it is often difficult to fix after the debugging is in place, and it needs to be continuously debugged in the next use

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