A mid-wave infrared optical system

Abstract

The invention provides a mid-wave infrared optical system, which solves the problem of temperature field measurement in nuclear reactors. The mid-wave infrared optical system includes an anti-pollution protection window, an imaging group, a relay mirror group, a correction mirror group and a detector assembly. The light emitted by the optical system is imaged by the imaging group, the image surface of the imaging group is coupled to the object surface of the correction group through the relay mirror, the imaging quality is adjusted by the correction mirror group, and the imaging information is collected by the detector component: wavelength range The diameter is 3.7um~4.8um, the field of view is 50 degrees, the diameter of the entrance pupil is 6.78mm, the F-number of the system is 2, and the total length of the system is 1770mm. In addition to the detector assembly, a total of 12 lenses are used, of which 10 aspherical surfaces are used on 4 surfaces. The mid-infrared optical system of the present invention has the advantages of easy processing, easy assembly and adjustment, small lens diameter, good imaging quality and the like.

Description

technical field [0001] The invention belongs to the application field of infrared optics, and in particular relates to a mid-wave infrared optical system. Background technique [0002] In nature, when the temperature of an object is higher than absolute zero, due to the existence of its internal thermal motion, it will continuously radiate electromagnetic waves to the surroundings, including infrared rays with a band of 0.75-100um. Infrared temperature field measurement is made using this principle. Temperature is a physical quantity that measures the degree of coldness and heat of an object. It is a very common and important thermal parameter in industrial production. Many production processes require monitoring and monitoring of temperature. Control, especially in nuclear reactors, needs to accurately reflect the temperature field distribution and gauge size in different regions of the nuclear reactor. Traditional contact thermometers such as thermocouples, thermal resist...

AI Technical Summary

Problems solved by technology

Traditional contact thermometers such as thermocouples, thermal resistances, etc., need a certain period of time to reach thermal equilibrium due to sufficient heat exchange with the measured substance. There is a phenomenon of temperature measurement delay, and at the same time, it cannot directly reflect a certain measurement The temperature field distribution in the region, so there are certain limitations in the use of temperature field detection in nuclear reactors

[0003] Aiming at the limitations of traditional contact thermometers and the fact that the existing infrared thermometers on the market cannot meet the requirements of strong radiation of nuclear reactors, complex space light environment and large field of view temperature field monitoring and measurement, we invented an infrared thermometer that can meet the needs of nuclear reactors. Instruments or optical systems for temperature field monitoring and measurement play a vital role in improving the safety performance of nuclear reactors

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