Novel system for optical axis on-line calibration

Wen Qiao; Huimin Yan; Wei Lu

doi:10.1117/12.782456

19 November 2007 Novel system for optical axis on-line calibration

Wen Qiao, Huimin Yan, Wei Lu

Proceedings Volume 6724, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems; 672405 (2007) https://doi.org/10.1117/12.782456
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China

Abstract

Calibration of optical axis is an essential process to ensure the quality of optical systems. Only when the light path center, CCD (Charge Coupled Device) center and rotary center of motor fit each other well, can the system run properly to fulfill the proposed function. However, in most cases, the process is conducted by experienced workers and it is hard to precisely evaluate the coherence of optical axis. So the development of an optical calibrator that can detect the optical axis and calibrate the center automatically is of high priority for precise optical instruments. In this research project, we aim to develop a novel system for optical axis online calibration. The system is based on photoelectric encoder for rotary signal sampling of motor. MCU (Micro Controlling Unit) is used as the main control module instead of PC to miniaturize and simplify the system. CPLD (Complex Programmable Logic Device) is employed to realize high speed data storage and processing. A motor driving circuit and a voltage interval location method are designed to control the motor to rotate precisely. The novel optical calibrator has already been taken into practical application in factories, and proved to be of high stability and resolution.

Citation Download Citation

Wen Qiao, Huimin Yan, and Wei Lu "Novel system for optical axis on-line calibration", Proc. SPIE 6724, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems, 672405 (19 November 2007); https://doi.org/10.1117/12.782456

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KEYWORDS

Calibration

Charge-coupled devices

Optical calibration

Computer programming

Control systems

Interfaces

Optical components

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