Coaxial Cassel-Green Folded Cavity Optical System Using Refractive Prism and Compound Secondary Mirror

Abstract

The invention discloses a coaxial Cassegrain folded cavity optical path system using a deviation prism and a composite secondary mirror. The coaxial Cassegrain folded cavity optical path system is suitable for optical design application of optical monitoring instruments and equipment. The coaxial Cassegrain folded cavity optical path system comprises a Cassegrain receiving mirror, wherein a small hole is formed in the center of a cavity mirror close to the Cassegrain receiving mirror in the folded cavity optical path system, an optical triple prism is arranged close to the small hole in an attached manner, and a Cassegrain system secondary mirror is designed as a reflection-transmission composite lens. By utilizing a refraction principle of the optical triple prism, ineffective shadowed light in a blind zone at the center of a Cassegrain receiving optical path, internal reference light used for monitoring and calibrating optical source characteristics of the system and external monitoring light of the Cassegrain folded cavity optical path form a single coaxial optical transmitting-receiving system, the light is received and subjected to data processing by a same set of optical and optoelectronic system, instrument optical path circuit designs are unified and optimized, the integration degree and reliability of instruments and equipment are improved, the installation and debugging process of instruments and equipment is simplified, and the size and weight of instruments and equipment are reduced.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a coaxial Cassel-Green folded cavity optical path system which is suitable for optical monitoring equipment and uses a refracting prism and a composite secondary mirror. Background technique [0002] In photoelectric monitoring instruments and equipment, the characteristics of the monitoring light source such as spectrum, power, and polarization directly affect the performance parameters of the optical monitoring instrument. Therefore, the detection instrument often needs to calibrate the detection light before and after work. The usual practice is to separate a small part of the light from the monitoring light as the light source reference light, and control the light source of the optical monitoring instrument through an electronic circuit, the emission of the light source of the general optical instrument, and the reception of the target reflection (scattering) signal (...

AI Technical Summary

Problems solved by technology

This kind of optical system designed with multi-optical path splitting mode, the optical channels are not coaxial, and the optical components of each optical path channel are separated, resulting in complex structure of optical instruments and equipment, mutual interference of optical signals, low stability and reliability, and difficult installation and adjustment, especially for This is especially true for some testing instruments that only calibrate the spectral power characteristics of the light source once before and after testing.

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