Transmission-type infrared temperature difference standard source applied to wide-temperature-range environment

Abstract

The invention relates to the field of infrared target characteristic simulation, in particular to a transmission-type infrared temperature difference standard source applied to a wide-temperature-range environment. A first black body provides target radiation energy; a second black body provides environment radiation energy; a through hole is formed in the center of an infrared target, and a reflective face is arranged on the periphery of the infrared target; the target radiation energy at the central part of the first black body passes through the through hole of the infrared target and a dichroic mirror, is converged by an athermalization transmission-type infrared optical system to be output. The environment radiation energy provided by the second black body is reflected to the reflective face of the infrared target through the dichroic mirror, and the reflected environment radiation energy can transmits through the dichroic mirror and is output through the athermalization transmission-type infrared optical system. By means of the radiation source system, the transmission-type infrared temperature difference standard source adopts double black bodies, and removes influence of working environment temperature variation in the whole system.

Description

technical field [0001] The invention relates to the field of infrared target characteristic simulation, in particular to a transmission-type infrared temperature difference standard source suitable for a wide temperature range environment. Background technique [0002] Any substance above absolute zero (-273°C) in nature has a certain amount of infrared energy and forms an energy field around it. Usually, an infrared thermal imager composed of infrared photosensitive devices senses the temperature. [0003] The design of the infrared temperature difference standard source in the prior art is relatively simple, and the feasibility is not high. The optical system is not athermalized, and the radiation source system only uses a single black body, so that the actual radiation temperature difference of the device will change with the ambient temperature under the same temperature difference setting, that is, the characteristics of the standard radiation target in different enviro...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem in the prior art that the refractive index of the infrared lens material changes greatly with the temperature change, it cannot be applied in a wide temperature range environment, and the reliability of the whole system is low. Transmissive infrared temperature difference standard source, using ambient blackbody and target blackbody to obtain the temperature difference between the environment and the target, so that the influence of temperature changes in the working environment can be eliminated in the entire system

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