A Four Right Angle Reflectors Extending Optical Length System

Abstract

A four right-angle reflectors-based optical path length increasing system, comprising: a first right-angle reflector (1), a second right-angle reflector (2), a third right-angle reflector (3), and a fourth right-angle reflector (4). The first right-angle reflector (1) and the second right-angle reflector (2) constitute an inner right-angle reflector set, and the third right-angle reflector (3) and the fourth right-angle reflector (4) constitute an outer right-angle reflector set, so that a light beam can be reflected hundreds of times in a limited space, thereby greatly increasing a contact optical path length between the light beam and a substance upon which the light beam acts, improving the device service efficiency, reducing the space required by a device, promoting the development of a miniaturized optical device, and improving the precision of a detection device.

Description

technical field [0001] The invention relates to the field of optics, in particular to a system for increasing the optical length of four right-angle mirrors. Background technique [0002] When light passes through a substance, the light signal in the absorption wavelength range of the substance will attenuate. According to the wavelength of light and the degree of attenuation of light intensity, the composition and content of the substance can be judged. [0003] When using light to pass through a transparent sample with a low concentration, such as gas, solution, etc., since most of the light source energy passes through the transparent sample and does not interact with the transparent sample, the efficiency of the excitation light source is low. In this case, the optical path length must be increased to increase the degree of interaction between the substance and light, and an obvious attenuation of the optical signal is observed. [0004] The increase of the optical path...

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Problems solved by technology

[0004] The increase of the optical path requires an increase in the length of the sample cell, or the increase of the optical path through multiple reflections of the mirror, but the current method of increasing the optical path has limited effects, and can only increase several times, at most two or three Ten times the optical path, the effect of compressing the space is also limited, resulting in the inability of some equipment to be miniaturized or the detection accuracy cannot be greatly improved

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