Inventor
USUI MASAYUKI
JP25 patents
⚠️ This page may combine multiple inventors who share the name “USUI MASAYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CANON KK
22 patentsUS4783155ANov 8, 1988
Optical device with variably shaped optical surface and a method for varying the focal length
CANON KK140 citations99
US5532990AJul 2, 1996
Optical information processing method and apparatus including measuring and correcting the offset of a tracking error signal from an output of a photodetector using a vibrating objective lens
CANON KK37 citations96
US5347503ASep 13, 1994
Optical information processing apparatus for correcting linearity of a photosensor output with respect to power of an emitted light beam
CANON KK54 citations96
US4872743AOct 10, 1989
Varifocal optical element
CANON KK92 citations96
US4729641AMar 8, 1988
Functional optical element having a non-flat planar interface with variable-index medium
CANON KK55 citations96
US4714326ADec 22, 1987
Method and element for optical modulation
CANON KK98 citations96
US5517475AMay 14, 1996
Optical information processing apparatus in which the offset of a tracking error signal is corrected in accordance with a relationship stored in a memory, in response to a position detection output signal
CANON KK24 citations92
US5404346AApr 4, 1995
Optical information processing apparatus including a correction circuit for correcting non-linearity of an output of a position detection circuit
CANON KK31 citations92
US5195081AMar 16, 1993
Optical apparatus for effecting recording and/or reproducing of information on/from and optical information recording medium
CANON KK21 citations92
US5010534AApr 23, 1991
Optical information recording-reproducing apparatus
CANON KK25 citations92
US4848879AJul 18, 1989
Light modulating device
CANON KK39 citations92
US4787075ANov 22, 1988
Optical information recording medium and apparatus for recording/reproducing information using the same
CANON KK32 citations92
US4783141ANov 8, 1988
Array lens
CANON KK42 citations92
US4781445ANov 1, 1988
Optical device having positionally changeable optical surfaces and a method of varying an image forming position
CANON KK39 citations92
US4712882ADec 15, 1987
Variable focal length lens
CANON KK36 citations92
US5247505ASep 21, 1993
Information recording method for reciprocally recording and verifying information
CANON KK9 citations74
US5119356AJun 2, 1992
Information recording and reproducing apparatus including detection of whether an information recording medium has been normally loaded into the apparatus
CANON KK8 citations74
US5018123AMay 21, 1991
Optical information recording medium and method for recording information on said medium and reproducing information therefrom
CANON KK9 citations74
US4922351AMay 1, 1990
Optical information recording and reproducing apparatus
CANON KK11 citations74
US4912697AMar 27, 1990
Apparatus and method for preventing recording errors due to a reduction in the relative speed between an information carrying light beam and a recording medium
CANON KK9 citations74
US4641920AFeb 10, 1987
Optical element having the function of changing the cross-sectional intensity distribution of a light beam
CANON KK8 citations70
US4865426ASep 12, 1989
Variable aberration imaging optical system
CANON KK6 citations63