Inventor
OHTAKA KEIJI
JP69 patents
Patents
50 patentsUS5486892AJan 23, 1996
Camera with visual axis detecting device
CANON KK49 citations96
US4849782AJul 18, 1989
Focus detecting device
CANON KK67 citations96
US4534637AAug 13, 1985
Camera with active optical range finder
CANON KK99 citations96
US4427265AJan 24, 1984
Diffusion plate
CANON KK73 citations96
US6014524AJan 11, 2000
Camera with visual axis detecting device
CANON KK24 citations93
US5182658AJan 26, 1993
Image pickup apparatus for controlling accumulation time in photoelectric elements
CANON KK30 citations93
US5053803AOct 1, 1991
Information display apparatus for camera
CANON KK39 citations93
US5005041AApr 2, 1991
Focus detecting apparatus having a plurality of focus detecting areas
CANON KK27 citations93
US4992819AFeb 12, 1991
Focus detecting device having a plurality of detecting areas and camera provided with the same
CANON KK26 citations93
US4992817AFeb 12, 1991
Focus detecting device switching between passive and active detection
CANON KK36 citations93
US4954701ASep 4, 1990
Focus detecting apparatus provided with a plurality of detecting fields
CANON KK36 citations93
US4914282AApr 3, 1990
Focus detection system employing multiple area light distribution sensors
CANON KK26 citations93
US4859842AAug 22, 1989
Multi-directional focus state detection apparatus
CANON KK54 citations93
US4812869AMar 14, 1989
Focus detecting apparatus
CANON KK35 citations93
US4728785AMar 1, 1988
Focus detecting device using adjustable inclined sensing means
CANON KK28 citations93
US4643557AFeb 17, 1987
Exposure control apparatus
CANON KK29 citations93
US7236655B2Jun 26, 2007
Polarization element and optical device using polarization element
CANON KK24 citations92
US7155073B2Dec 26, 2006
Polarization element and optical device using polarization element
CANON KK20 citations92
US7116478B2Oct 3, 2006
Polarization beam splitter and optical system using the same, and image displaying apparatus, using the same
CANON KK39 citations92
US7071985B1Jul 4, 2006
Optical device and method for selecting object of focus
CANON KK22 citations92
US6577344B2Jun 10, 2003
Focus state detection apparatus with image sensing device controls
CANON KK20 citations92
US6506446B2Jan 14, 2003
Anti-fog coating material and method of preparing an anti-fog article
CANON KK23 citations92
US6306932B1Oct 23, 2001
Anti-fogging coating material, anti-fogging coating film and anti-fogging article
CANON KK20 citations92
US6088537AJul 11, 2000
Focus detecting device
CANON KK26 citations92
US5912504AJun 15, 1999
Semiconductor photo-sensor and method for manufacturing the same
CANON KK18 citations92
US5864721AJan 26, 1999
Focus detecting apparatus
CANON KK21 citations92
US5839001ANov 17, 1998
Focus detecting apparatus
CANON KK21 citations92
US5583076ADec 10, 1996
Method for manufacturing a semiconductor photo-sensor
CANON KK27 citations92
US4774539ASep 27, 1988
Camera having a focus detecting apparatus
CANON KK38 citations92
US4567123AJan 28, 1986
Diffusing plate
CANON KK39 citations92
US4421398ADec 20, 1983
Focussing plate
CANON KK29 citations92
US6594085B2Jul 15, 2003
Image display apparatus and optical system
CANON KK13 citations84
US6055376AApr 25, 2000
Observation optical system and optical apparatus having the same
CANON KK16 citations84
US4959677ASep 25, 1990
Device for detecting the focus adjusted state of an objecting lens
CANON KK20 citations82
US4801963AJan 31, 1989
Focus detecting system
CANON KK20 citations82
US4792668ADec 20, 1988
Apparatus for detecting focusing state of objective lens
CANON KK21 citations82
US4698492AOct 6, 1987
Focus detector system with a distortion compensation mask
CANON KK23 citations82
US4670645AJun 2, 1987
Focus detecting device with shading reduction optical filter
CANON KK22 citations82
US4634255AJan 6, 1987
Focus detection apparatus
CANON KK21 citations82
US4555169ANov 26, 1985
Focus detecting device for a camera
CANON KK23 citations82
US5729771AMar 17, 1998
Focus detecting apparatus and optical apparatus using it
CANON KK7 citations74
US5262819ANov 16, 1993
Compact focus detecting device suitable for incorporation into an optical apparatus
CANON KK18 citations74
US5109154AApr 28, 1992
Focus detection device having a plurality of means for forming light patterns provided at different distances from the optical axis
CANON KK12 citations74
US4922282AMay 1, 1990
Optical apparatus for leading light fluxes transmitted through light dividing surface which is obliquely provided to focus detecting apparatus
CANON KK11 citations74
US4907026AMar 6, 1990
Light projection system for automatic focus detection
CANON KK12 citations74
US4878078AOct 31, 1989
Focus detecting device and method of making same
CANON KK14 citations74
US4841326AJun 20, 1989
Apparatus for detecting the focus adjusted state of an objective optical system
CANON KK16 citations74
US4833313AMay 23, 1989
Focus detecting apparatus having increased SNR by selectively varying or holding constant the number of signals from sensor arrays
CANON KK10 citations74
US4825239AApr 25, 1989
Distance detection method and apparatus
CANON KK18 citations74
US4800410AJan 24, 1989
Focus detecting apparatus for selecting the operating process in conformity with the contrast of an object
CANON KK16 citations74
Showing the top 50 of 69 patents by PatentIndex Score.