Inventor
TAKASUKA SHOICHI
JP12 patents
⚠️ This page may combine multiple inventors who share the name “TAKASUKA SHOICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
10 patentsUS6747939B2Jun 8, 2004
Semiconductor laser device and optical pickup device using the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD21 citations92
US6728034B1Apr 27, 2004
Diffractive optical element that polarizes light and an optical pickup using the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD40 citations92
US6597642B1Jul 22, 2003
Photodetector unit, and optical pickup, optical reproduction apparatus, and optical recording apparatus equipped with the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD33 citations92
US7064898B1Jun 20, 2006
Optoelectronic device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD11 citations83
US7139235B2Nov 21, 2006
Optical element with diffraction grating, semiconductor device, and optical information recording device employing the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations73
US7035196B2Apr 25, 2006
Optical head device and optical recording and reproducing apparatus having lasers aligned in a tangential direction
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD10 citations73
US6735024B2May 11, 2004
Optical pickup with improved optical properties
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations73
US6728035B2Apr 27, 2004
Optical device with diffraction grating having plural grating regions
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD8 citations73
US6501601B1Dec 31, 2002
Optical device with diffraction grating having plural grating regions
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12 citations73
US6947213B2Sep 20, 2005
Diffractive optical element that polarizes light and an optical pickup using the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD0 citations52