[OPTICAL REVIEW Vol. 1, No. 2 (1994) 262-265]

Design, Fabrication and Evaluation of a Photographic Objective That Uses a Radial GRIN Lens

Toshiyuki NAGAOKA, Hirofumi TSUCHIDA and Kimiaki YAMAMOTO

T. Morokuma Research Laboratory, Olympus Optical Co., Ltd., 2-3, Kuboyama-cho, Hachioji, Tokyo, 192 Japan

(Accepted September 9, 1994)

Some technical issues in the design, fabrication and evaluation process of the photographic objective lens are treated. In the design process, a unique design technique called the quasi-equivalent glass method is applied. Also, a convenient method is described for the determination of tolerances of the refractive index profile. Performance evaluation showed that the GRIN material made by sol-gel method is usable for photographic lenses.

Key words : optical design, gradient index optics, optical fabrication, cameras, sol-gels