Infrared centering instrument for large aperture optical system and measurement method thereof
By combining an infrared centering instrument with an air-bearing turntable and a vibration-isolated base, the problem of disconnection between multi-lens assembly and closed-loop detection in large-aperture infrared optical systems is solved. This method achieves efficient and stable multi-lens eccentricity measurement and resistance to low-frequency vibration, making it suitable for infrared optical systems with a large curvature range.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHANGCHUN JINGYI PHOTOELECTRIC TECH CO LTD
- Filing Date
- 2026-05-29
- Publication Date
- 2026-07-17
AI Technical Summary
Large-aperture infrared optical systems suffer from problems such as the disconnect between multi-lens assembly and testing closed loops, low efficiency of traditional sphere center measurement modes, and high sensitivity to environmental disturbances during precision assembly and testing, especially under low-frequency vibration interference, where alignment accuracy is difficult to guarantee.
The system employs an infrared centering instrument combined with an air-bearing turntable and a vibration-isolated base. It achieves real-time measurement of the relative pose of multiple lenses through an infrared laser light source and a wide-band infrared detector. It adopts two measurement modes: sphere center and sphere top. Combined with a four-dimensional adjustment frame and bottom vibration isolation components, it forms a closed-loop process of adjustment-measurement-feedback-readjustment, which is compatible with measurements of a large curvature range.
It enables online real-time closed-loop detection of multiple lenses, improves assembly and adjustment efficiency and accuracy, reduces the impact of low-frequency vibration on measurement, can directly measure the eccentricity of internal lenses, expands the measurement range and improves alignment stability.
Smart Images
Figure CN122409148A_ABST