Long wave infrared optical athermalization temperature measuring lens with ultra-large view field and manufacturing method thereof

Abstract

The invention relates to a long wave infrared optical athermalization temperature measuring lens with an ultra-large view field. The optical system of the lens is sequentially provided with the following components in the light incidence direction from left to right: a negative moon shape lens (A), a plano-convex lens (B), and a double convex lens (C), which are made of different materials. The provided lens has the advantages of large relative aperture, ultra-wide field angle, low deformation, self-adaptive optical athermalization compensation, and light structure. The difference of refractive index change of an optical material under different temperatures is used to compensate the influence of temperature change on a focal plane; thus the structure of athermalization design becomes simpler, the structure of overall product becomes smaller, the weight becomes lighter, the optical axis is stable, the image becomes clearer, the reliability is high, the requirements of imaging performance of customers can be met, and the structure is convenient to use for the customers.

Description

technical field [0001] The invention relates to the technical field of optical lens devices, in particular to an ultra-large field of view long-wave infrared optical athermalization temperature measurement lens and a manufacturing method thereof. Background technique [0002] As a non-contact temperature measurement technology, infrared temperature measurement technology has many advantages compared with traditional temperature measurement technology. First, its measurement does not interfere with the temperature measurement field, does not affect the temperature distribution, and has high accuracy and precision; secondly, Infrared temperature measurement is fast and can be observed in real time, which has great advantages in measurement; thirdly, infrared temperature measurement can be near or far, and can work at night, with strong adaptability; finally, infrared temperature measurement has a wide range and theoretically has no upper limit for testing. This makes infrared ...

AI Technical Summary

Problems solved by technology

Because infrared optical materials and mechanical materials will produce thermal deformation when the temperature changes, the drastic change of working temperature will cause the focal length change of the optical system, the image surface is elegant, and the image quality is reduced.

In order to eliminate or reduce the impact of temperature changes on the imaging of the optical system, corresponding compensation techniques must be used to keep the focal length of the optical system unchanged within a large temperature range to ensure good imaging quality. In addition, existing lenses have imaging The small field of view cannot completely obtain the overall structure of the test object. In addition, the inaccuracy of concentricity, precision and axial position also affects the implementation of compensation technology

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