Laser & Optoelectronics Progress, Volume. 57, Issue 5, 052201(2020)
Design of Continuous Zoom Double Telecentric System and Analysis of Cam Curve
In order to meet the machine vision system’s demand on the zoom double telecentric system, we design a double telecentric lens that can achieve continuous zoom. The system magnification is from -0.50× to -0.20×, and the observable diameter range of the object field of view is from 22 mm to 55 mm. The designed system meets the design requirements of low distortion ( less than 0.1% for all multiplications ), high resolution (higher than 0.30 at 77.5 lp/mm), and high telecentricity (less than 0.1° for all multiplications), and has the advantages of being insensitive to object surface and image plane displacement as well as continuous zoom detection. Two methods to solve the variable cam curve are introduced and used to verify each other. The verification indicates the accuracy of the cam curve data, which plays an important role in the subsequent production and processing of the variable magnification system.
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Wenwei Ye, Jinxuan Huang, Tianfu Zhou, Feng Lin. Design of Continuous Zoom Double Telecentric System and Analysis of Cam Curve[J]. Laser & Optoelectronics Progress, 2020, 57(5): 052201
Category: Optical Design and Fabrication
Received: Jul. 29, 2019
Accepted: Aug. 27, 2019
Published Online: Mar. 5, 2020
The Author Email: Ye Wenwei (yww_dyx@163.com), Lin Feng (lfeng127@163.com)