Large-view-field infrared thermal imaging optical system and application thereof

Abstract

The invention provides a large-view-field infrared thermal imaging optical system. The imaging optical system sequentially comprises a meniscus negative-focal-power lens L1, a diaphragm S, a biconvex positive-focal-power lens L2 and a meniscus positive-focal-power lens L3 from an object plane to an image plane along an optical axis. And the reciprocal 1 / gamma of the angular magnification of the meniscus negative-power lens L1 to the off-axis main light meets the condition that 1 / gamma is more than or equal to 1.5 and less than or equal to 2.4. The invention further provides application of the large-view-field infrared thermal imaging optical system in the medical field. According to the large-view-field infrared thermal imaging optical system, the design of an optical system with a large relative aperture, a large view field and high illumination uniformity is realized, and the large-view-field infrared thermal imaging optical system not only has a high-spatial-resolution imaging capability, but also has the capabilities of low-noise equivalent temperature difference and large imaging view field; the temperature measurement requirement of infrared thermal imaging equipment on a high-performance infrared optical system is met, and wide application and popularization in the medical technology are facilitated.

Description

technical field [0001] The invention relates to the field of optical technology, more specifically, to a large field of view infrared thermal imaging optical system and its application. Background technique [0002] In the medical field, infrared thermal imaging technology is used to collect thermal radiation signals on the surface of the human body and accurately measure the temperature field distribution in various regions of the human body for human health examination and pathological diagnosis. It is becoming a new dimension of auxiliary diagnostic methods. In the field of western medicine, infrared thermal imaging technology is applied to human health examination and research on the physiological and pathological responses of diseases. For example, a clinical research report in the United States pointed out that infrared thermal imaging diagnostic technology can detect tumors 6 to 12 months earlier than CT. There is a close correlation between infrared thermography dia...

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Problems solved by technology

At present, the infrared optical system in thermal imaging equipment is difficult to meet the above requirements

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