Issued Patents All Time
Showing 1–25 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11378877 | Homogenizer, illuminating optical system, and illuminator | Koichi Tashima, Kensuke ONO, Atsushi Koyanagi | 2022-07-05 |
| 10746908 | Optical filter and imaging device | Hiroshi Kumai, Kazuhiko SHIONO, Hiroki Hotaka | 2020-08-18 |
| 10683233 | Light selective transmission type glass and laminated substrate | Shuhei Nomura, Kazutaka Ono, Hiroki Hotaka | 2020-06-16 |
| 10310150 | Near-infrared cut filter and solid-state imaging device | Takashi Sugiyama, Katsumasa Hosoi, Atsushi Komori, Makoto Hasegawa | 2019-06-04 |
| 10228500 | Optical filter and imaging device | Kazuhiko SHIONO, Asana Yoshioka, Shoko SUZUKI, Hiroki Hotaka | 2019-03-12 |
| 8565058 | Liquid crystal alignment film, process for its production, optical element using the liquid crystal alignment film, and optical information writing/reading device | Kazuhiko SHIONO, Hiroshi Kumai | 2013-10-22 |
| 7835252 | Optical head apparatus | Koichi Murata | 2010-11-16 |
| 7773489 | Liquid crystal lens element and optical head device | Kouichi Murata, Takuji Nomura, Mitsuo Oosawa, Yuzuru Tanabe | 2010-08-10 |
| 7764354 | Multi-layer diffraction type polarizer and liquid crystal element | Masahiro Murakawa | 2010-07-27 |
| 7738346 | Polarizing diffraction element and optical head device | Hiromasa Sato, Tomoki Gunjima | 2010-06-15 |
| 7738344 | Liquid crystal lens element optical head device | Takuji Nomura, Toshimasa Kakiuchi, Mitsuo Oosawa, Yuzuru Tanabe | 2010-06-15 |
| 7719657 | Liquid crystal lens element and optical head device | Yuzuru Tanabe, Hiromasa Sato, Takuji Nomura, Ryuichiro Shimizu | 2010-05-18 |
| 7710536 | Liquid crystal diffraction lens element and optical head device | Mitsuo Osawa | 2010-05-04 |
| 7688700 | Phase correction element and optical head device | Masahiro Murakawa, Hiromasa Sato, Masao Miyamura | 2010-03-30 |
| 7564504 | Phase plate and an optical data recording/reproducing device | Ryota Murakami, Hiromasa Sato, Takuji Nomura, Masahiro Murakawa, Yoshiyuki Miyake | 2009-07-21 |
| 7548359 | Double-wavelength light source unit and optical head device having four diffraction gratings | Ryota Murakami | 2009-06-16 |
| 7430076 | Diffraction element | Hiromasa Sato | 2008-09-30 |
| 7388822 | Liquid crystal lens element and optical head device | Hiromasa Sato, Ryuichiro Shimizu, Takuji Nomura, Yuzuru Tanabe, Mitsuo Oosawa | 2008-06-17 |
| 7079202 | Multi-layer diffraction type polarizer and liquid crystal element | Masao Ozeki | 2006-07-18 |
| 6917576 | Retarder and optical head device installing the same | Takehiko Nishiyama, Naomitsu Umemura, Hiromasa Sato, Masahiro Murakawa, Yuzuru Tanabe | 2005-07-12 |
| 6891147 | Wavelength-selective diffraction element and an optical head device | Ryuichiro Goto, Hiroki Hotaka, Reiko Nozawa, Noriaki Shimodaira, Ryota Murakami | 2005-05-10 |
| RE38305 | LCD device including an illumination device having a polarized light separating sheet between a light guide and the display | Tomoki Gunjima, Masao Ozeki, Hiroaki Ito, Hiroshi Hasebe, Tetsuro Matsumoto +1 more | 2003-11-11 |
| 6580674 | Phase shifter and optical head device mounted with the same | Takehiko Nishiyama, Naomitsu Umemura, Hiromasa Sato, Masahiro Murakawa, Yuzuru Tanabe | 2003-06-17 |
| RE37377 | LCD device including an illumination device having a polarized light separating sheet between a light guide and the display | Tomoki Gunjima, Masao Ozeki, Hiroaki Ito, Hiroshi Hasebe, Tetsuro Matsumoto +1 more | 2001-09-18 |
| 5844638 | Light source apparatus using a cone-shaped element and an applied apparatus thereof | Tsuneo Wakabayashi, Shigeyuki Serizawa, Yoshiyuki Sonda | 1998-12-01 |