Short-wave infrared lens stray radiation detection method

Abstract

The invention relates to a short-wave infrared lens stray radiation detection method comprising the following steps: measuring the stray radiation coefficient of an infrared lens, acquiring the optical structure and parameters of the infrared lens, and importing the optical structure of the lens into stray light analysis software to establish a light machine structure model of the lens; searching 'key surfaces' of the surfaces of the lens and 'lighting surfaces' corresponding to different light incidence angles according to the established light machine structure model; and detecting a part with both the 'key surfaces' and the 'lighting surfaces' in the established model, showing that the established model has a stray radiation transmission path at the angle, and taking a corresponding suppression measure according to the detected stray radiation transmission path. By using the method, stray radiation produced by the infrared lens can be analyzed more comprehensively and accurately, a more-targeted accurate suppression measure can be taken in the later period, and the influence of stray radiation on the infrared lens can be eliminated to the greatest degree.

Description

Technical field [0001] The invention relates to a method for detecting stray radiation of a short-wave infrared lens, and belongs to the technical field of opto-mechanical simulation. Background technique [0002] The short-wave infrared imaging lens receives the short-wave infrared light reflected by the objects in the field of view, such as most natural objects, and the self-radiation light of high-temperature targets, such as the sun and high-temperature plume, and images them on the detector. In terms of waveband range, it is close to the visible light waveband and has certain interoperability, but it belongs to the infrared system and has the characteristics of energy radiation. Stray light is a general term for abnormally transmitted light in an optical system. It is caused by light leakage, residual reflection on the transmitted optical surface, residual scattering on non-optical surfaces such as the inner wall of the lens barrel, and scattered light due to optical surface...

AI Technical Summary

Problems solved by technology

The third category is the stray light caused by the abnormal optical path transmission or scattering of the target light in the field of view by optical elements such as optical windows, lenses, and mirrors due to design, pollution, or manufacturing reasons.

For visible light systems, ghost image analysis, as the main representative of stray light, has been greatly developed in some optical design software, such as CODEV, but it only involves the secondary reflection of the lens surface to form light spots, and even imaging

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