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Optimal design of cam curves for zoom lens
Author(s): Zihao Qiang; Li Wu; Chao Mei; Yue Zhao
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Paper Abstract

Zoom cam is a pivotal part used for driving every lens group in zoom lens , the design result of cam curve is decisive importance for motion property and system precision as well as system imaging in zoom system, therefore, zoom cam design is an important part of the zoom lens design, a fine cam performance is the basic requirements to reach lens design of image quality goal and optical zoom process. a new method is presented in this article, it adopts the method of piecewise processing to establish several common functions in steep interval so as to make the arc length non-uniform and to segment the arc length equally in the smooth curve. The initial cam curve of an optical system is optimized and analyzed, the results show that when the arc length is divided by the power function, the cam curve can be significantly improved, the pressure angle of the curve can be reduced, and the optimized curve is smooth and without inflection point, which can effectively improve the overall performance of the cam.

Paper Details

Date Published: 24 July 2018
PDF: 5 pages
Proc. SPIE 10827, Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018), 108272V (24 July 2018); doi: 10.1117/12.2500614
Show Author Affiliations
Zihao Qiang, Xi’an Institute of Optics and Precision Mechanics, CAS (China)
Univ. of Chinese Academy of Sciences (China)
Li Wu, Xi’an Institute of Optics and Precision Mechanics, CAS (China)
Chao Mei, Xi’an Institute of Optics and Precision Mechanics, CAS (China)
Yue Zhao, Xi’an Institute of Optics and Precision Mechanics, CAS (China)


Published in SPIE Proceedings Vol. 10827:
Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018)
Yingjie Yu; Chao Zuo; Kemao Qian, Editor(s)

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