一种遥感相机异形遮挡孔径对出瞳影响的评估方法
By combining ray tracing and coordinate transformation, the problem of evaluating the impact of irregularly shaped occlusion aperture on the exit pupil was solved, which improved the accuracy of imaging performance evaluation and modulation transfer function calculation of the optical system, and reduced the cost of optical design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHANGGUANG SATELLITE TECH CO LTD
- Filing Date
- 2025-09-16
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the methods for evaluating the impact of irregularly shaped occlusion apertures on the exit pupil are not very accurate, leading to inaccurate optical system design and imaging quality assessment. Especially under off-axis field of view conditions, the calculated results of point spread function and modulation transfer function deviate significantly from the actual situation, affecting imaging performance and system reliability.
A method combining ray tracing and coordinate transformation is adopted. By constructing a global coordinate system, the projection of the incident ray in the irregular occlusion aperture is calculated, generating the occlusion mask matrix and the deformed exit pupil matrix. The transmission aperture in the exit pupil plane is directly calculated, and the exit pupil deformation caused by off-axis field of view is considered to improve the evaluation accuracy.
It improves the calculation accuracy of point spread function and modulation transfer function in off-axis field of view, enhances the accuracy of imaging performance evaluation, reduces the research cost of optical design, and improves the reliability of optical system.
Smart Images
Figure CN121028371B_ABST