A quantitative study of the focus tuning by a liquid crystal lens in an imaging system composed of a camera module and the liquid crystal lens that performs the focusing function is reported. The resolving capability of the imaging system is investigated by analyzing the image of an ISO12233 chart formed by the system. Measurements show that with the focus tuning by the liquid crystal lens, the resolving power of the system can be very close to that of the camera module.
© 2012 Optical Society of America
Original Manuscript: August 8, 2012
Revised Manuscript: September 30, 2012
Manuscript Accepted: October 1, 2012
Published: October 29, 2012
Mao Ye, Bin Wang, Masaru Uchida, Satoshi Yanase, Shingo Takahashi, and Susumu Sato, "Focus tuning by liquid crystal lens in imaging system," Appl. Opt. 51, 7630-7635 (2012)