Recently, the number of camera companies that produce commercializing interchangeable lens systems such as digital single lens reflex (DSLR) and compact system camera (CSC) lenses has been gradually increasing. These interchangeable lenses have various kinds of lenses with distinct specifications. In particular, the distance window among these specifications is the function most preferred by customers. Mechanical manual zoom and manual focus in these high end camera lenses with a distance window are in particular desirable specifications and are required for product quality. However, the AF lens group is linked to the zoom cam and moves. Because the AF lens group moves along with the object distance, we can not realize the distance window with only zoom locus calculation. In this paper, in order to solve the problem, we suggest an optical calculation method for a corrected AF zoom cam for an interchangeable lens with a distance window to achieve product differentiation and analyze the error in the calculation.
© 2014 Optical Society of Korea
(110.0110) Imaging systems : Imaging systems
(220.2740) Optical design and fabrication : Geometric optical design
(220.3620) Optical design and fabrication : Lens system design
(220.4830) Optical design and fabrication : Systems design
Original Manuscript: December 13, 2013
Revised Manuscript: January 8, 2014
Manuscript Accepted: January 17, 2014
Published: February 25, 2014
Jin Woo Kim, Jae Myung Ryu, Jae Heung Jo, and Young-Joo Kim, "Evaluation of a Corrected Cam for an Interchangeable Lens with a Distance Window," J. Opt. Soc. Korea 18, 23-31 (2014)
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