Inventor
YUDA HIDEAKI
JP8 patents
Patents
8 patentsUS4771308ASep 13, 1988
Auxiliary light projecting apparatus for a focus detecting system
ASAHI OPTICAL CO LTD94 citations96
US5081545AJan 14, 1992
Focusing screen
ASAHI OPTICAL CO LTD30 citations92
US5085977AFeb 4, 1992
Focusing screen and a method of forming a microstructure array for use with a focusing screen
ASAHI OPTICAL CO LTD21 citations82
US4870442ASep 26, 1989
Auxiliary light projecting apparatus for a focus detecting system
ASAHI OPTICAL CO LTD8 citations73
US4600830AJul 15, 1986
Focus detecting device
ASAHI OPTICAL CO LTD6 citations73
US4580042AApr 1, 1986
Focusing position detecting device using a sector shaped mirror
ASAHI OPTICAL CO LTD7 citations73
US4905034AFeb 27, 1990
Automatic focusing projector
ASAHI OPTICAL CO LTD10 citations69
US4949115AAug 14, 1990
Automatic focusing projector
ASAHI OPTICAL CO LTD5 citations62