Method for obtaining internal stray radiation of an infrared optical system

By establishing a radiation transmission model and calculating the radiation flux of the stray radiation source inside the infrared optical system, the problem of long calculation time and accuracy dependence on computer performance in the prior art is solved, and fast and accurate stray radiation calculation is achieved.

CN113935160BActive Publication Date: 2025-08-05XIAN INST OF OPTICS & PRECISION MECHANICS CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202111151189.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-09-29
Publication Date
2025-08-05
Estimated Expiration
2041-09-29

AI Technical Summary

Technical Problem

The existing internal stray radiation analysis methods of infrared optical systems require fine modeling, resulting in long calculation time and the accuracy of results dependent on computer performance, making it impossible to quickly obtain accurate results.

Method used

Establish a radiation transmission model, determine the internal stray radiation source, including the inner wall of the lens barrel, the frame and the compression ring, establish a coordinate system according to its relative positional relationship, calculate the radiation flux of each radiation source at the focal plane of the detector, and use the formula to calculate the radiation flux.

Benefits of technology

It provides a fast and accurate internal stray radiation calculation method, which reduces the calculation process and time, is suitable for any infrared optical system, and improves the calculation accuracy.

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Abstract

This invention provides a method for acquiring internal stray radiation from infrared optical systems. This method addresses the problem of calculating internal stray radiation energy during cold optics implementations of infrared optical systems. Compared to existing simulation methods, this method can rapidly calculate internal stray radiation from infrared systems. The primary source of internal stray radiation from infrared optical systems is spontaneous infrared radiation from the inner wall of the lens barrel, the lens frame, and the pressure ring. Based on radiation transmission theory, this invention establishes a corresponding model. By establishing a coordinate system for the inner wall of the lens barrel, the lens frame, and the pressure ring relative to the detector focal plane, a corresponding algorithm model is established to calculate internal stray radiation. This acquisition method provides rapid calculations and relatively accurate results.
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