Incident angle of parallel light measurements based on optical vernier principle

Abstract

The incident angle of a parallel light beam is hard to measure accurately under the requirement of both high precision and large measurement range. A solution based on the optical vernier principle is presented, and a corresponding measuring device is given. Compared with the former method, the suggested apparatus realizes high accuracy in a larger measurement range. The experiments on the designed apparatus show a high precision of better than 0.02° in a measurement range of ±64° and the experimental results are in accordance with analytical results in theory. The invented apparatus can be widely used in many technical areas such as aerospace, precision measurement and automatic control.

References

1. Chen Feifan, Chen Yifeng . Two-axis micro sun sensorusing optical nonlinear compensation. Journalof Tsinghua University (Science and Technology), 2004, 44(2): 197–200 (in Chinese) 2. Chum J, Vojta J, Base J, et al.. A simple low cost digital sun sensor for micro-satellites. 2004 3. de Boom C W . Sun sensors from TNO TPD. Delft: TNO TPD, 2003 4. Buonocore M, Grassi M, Rufino G . APS-based miniature sun sensor for earth observationnanosatellites. Acta Astronautica, 4thIAA International Symposium on Small Satellites for Earth Observation, 2005, 56(1–2): 139–145 5. Kouzmin V S, Cheremoukhin G S, Fedoseev V I . Miniature sun sensor. Proceedingsof SPIE, 1996, 2739: 407–410. doi:10.1117/12.241939 6. Cai Shuzhang, Jing Fangsheng . Optical-Electrical Autocollimationand the Application. Beijing: China Metrology Publishing House, 1986 (in Chinese) 7. Qin Shiqiao, Chen Yujiao, Su Yong, et al.. High precision automatic angle measuring system. Instrument Technique and Sensor, 1999, (11): 13–15 (in Chinese) 8. Cao Xuedong, Geng Lihong, Fan Tianquan . A new calibration apparatus for elevation angle of theodolite. Opto-Electronic Engineering, 1999, (S1): 135–138 (in Chinese) 9. Pan Mengchun, Ren Yongyi, Mao Shengyong . The real-time detection of pose and control of laserguiding vehicle (LGV). Journal of NationalUniversity of Defense Technology, 1994, 16(2): 34–37 (in Chinese)