Cushman, Darby & Cushman
Real-time light-measuring system for single-lens reflex cameras
 A light-measuring system for single-lens reflex cameras wherein the light coming from an object to be photographed as reflected at the image-pickup surface is reflected once again by a partially reflecting means disposed in the photographing light path, so that this latter reflection light is measured on its own optical axis, to enable to perform the real-time measurement of light with a high precision. 
Olympus Optical Co., Ltd.
G G
G03B G03B
inventional inventional
Toru Kazuo Toshihiro Shin-ichi
Fujii Ikari Imai Mihara