Mr. Zhengfei Li Profile

Zhengfei Li

at Univ of Electronic Science and Technology of China

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Proceedings Article | 13 December 2021 Paper

Study on the self-calibration technology used in large diameter and long focal length collimator

Cheng Yang, Xinmei Yang, Zhengfei Li

Proceedings Volume 12071, 120710G (2021) https://doi.org/10.1117/12.2604502

KEYWORDS: Collimators, Calibration, Mirrors, Charge-coupled devices, Off axis mirrors, Reflectors, Reflectivity, Temperature metrology, Reticles, Light

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The large diameter and long focal length collimator can be used to measure the parallelism between the various optical axes of multi-axis photoelectric system. After moving, vibration or change of ambient temperature, the collimator components location will change, and its own parallelism will disorder. Outside the laboratory, it's difficult to recalibrate the disorder collimator. This will directly affect the reliability of the collimator measurement results. In this paper, a self-calibration method was proposed, the collimator structure was optimized, CCD detection imaging was introduced and self-calibration component was designed. The radial calibration and depth of focus calibration principles were studied in collimator. Based on this, a set of collimator will be developed, which can measure the optical axis parallelism and its own parallelism included. When the collimator own parallelism disorders in the use of an external field, it's easier to finish the self-calibration in the scene. The measurement accuracy of the instrument can be ensured. A set of sun fleck positioning system software will be programmed, and it can be used to coordinate with self-calibration and measuring the optical axis parallelism function in the collimator. The study in this paper has important practical significance for scientific research and engineering experiments.

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