一种入瞳前置制冷型自由曲面离轴三反光学系统
By designing a freeform off-axis three-mirror optical system with the entrance pupil in front, the problems of small imaging field of view, large size and poor engineering feasibility in the existing technology have been solved, realizing a large field of view, low distortion and compact optical system, which is suitable for cooled detectors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAN INST OF OPTICS & PRECISION MECHANICS CHINESE ACAD OF SCI
- Filing Date
- 2023-07-31
- Publication Date
- 2026-07-17
AI Technical Summary
Existing off-axis three-mirror optical systems suffer from problems such as small imaging field of view, large size, inability to achieve front entrance pupil or compatibility with cooled detectors, and poor engineering feasibility.
Design an entrance pupil front-cooled freeform surface off-axis three-mirror optical system, which adopts a first mirror, a second mirror, a third mirror, a detector cold window and a detector cold stop arranged in sequence from the object plane to the focal plane. The mirror surface is an xy polynomial freeform surface, the lens has positive and negative optical power, and the optical structure is optimized through a specific coordinate system and rotation relationship.
It achieves 100% cold aperture matching, front entrance pupil, large field of view, low distortion, and compact size. The optical system has no chromatic aberration, high transmittance, and good thermal stability. It is suitable for cooled detectors and has excellent cold reflection suppression characteristics and imaging performance.
Smart Images
Figure CN116880049B_ABST