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Study of the measurement method of zero position variation in a high-precision optical sight

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Zero position variation is one of the important indicators to measure the stability of an optical sight. Repeated installation error cannot be ignored for high-precision optical sights. Thus we design a device that can automatically eliminate repeated installation error. It consists of an automatic fitting device with a spectroscope and an autocollimator. A micro-motion fine-tuned closed-loop feedback system is formed with a pressure sensor and a piezoelectric ceramic micro-displacement device to achieve real-time adjustment of the space posture of the spectroscope. The experimental verification shows that the accuracy of the system can achieve 1.5′′ within the 2° measurement range. Using this system, the precision of the zero position variation in a high-precision optical sight is up to 2′′, which is sufficient to meet the measurement requirements for the zero position variation in a high-precision optical sight.

© 2019 Optical Society of America

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