Inventor

MARUYAMA KOICHI

JP140 patents

⚠️ This page may combine multiple inventors who share the name “MARUYAMA KOICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

MARUYAMA KOICHI

ASAHI OPTICAL CO LTD

Objective lens for optical pick-up

Objective lens for optical pick-up

Chromatic aberration correcting element and its application

Chromatic aberration correcting element and its application

Diffractive multi-focal objective lens

Chromatic aberration correcting element and its application

Beam protecting device

Objective lens for optical pick-up

Optical system of optical pick-up

Optical system for observing equipment having image-vibration compensation system

Eyepiece lens system

Triplet lens system with diffractive lens features

Chromatic aberration correcting element and its application

Chromatic aberration correcting element and its application

Chromatic aberration correction element and its application

Multibeam recording device

Optical system for optical disc apparatus including anamorphic prisms

Image stabilizing apparatus

Apparatus for adjusting an optical axis including plates on opposite sides of a beam shaping prism

Image stabilizing apparatus

Optical disc apparatus having five light receiving areas for detecting focus error and tracking error

Apparatus for adjusting an optical axis including a laser beam source and a beam shaping prism

Image blur compensating telephotographic lens

Zoom lens capable of image blur compensation

Beam shaping optical system

Telephoto zoom lens system having four lens groups

Beam shaping optical system

Beam projecting apparatus

Optical system of optical information recording/ reproducing apparatus

Optical data recording and reproducing apparatus including chromatic aberration correction

Collimating lens for optical system using semiconductor laser

Optical system of optical information recording/reproducing apparatus

Objective lens system of optical information recording/reproducing apparatus

UV image forming optical system

Magneto-optic recording/reproduction apparatus for minimizing variation in focusing error signals caused by variation in optical source wavelength

PENTAX CORP

Objective lens having diffractive structure for optical pick-up

Optical system of optical pick-up

Optical pick-up

Diffraction optical element

Image reading system with flare compensation

Objective lens for optical pick-up

High NA objective lens for optical pick-up

Objective lens for optical disc

Objective lens for optical pick-up

Objective lens for optical pick-up

High NA objective lens for optical pick-up

TAKAKUBO YUTAKA

Imaging optical system and imaging apparatus

HONDA MOTOR CO LTD

Coupling structure of threaded member and synthetic resin part for vehicle

ASAHI KOGAK KOGYO KABUSHIKI KA

Chromatic aberration correcting element and its application

HITACHI LTD

Objective lens optical system, optical head and optical information reproduction apparatus