Issued Patents All Time
Showing 51–64 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6243216 | Fast responding optical modulator | Jang-hoon Yoo | 2001-06-05 |
| 6222801 | Optical pickup using optically variable iris | Jang-hoon Yoo, Yong Jae Lee, Tae Kyung Kim, Yong-Ki Son | 2001-04-24 |
| 6222812 | Optical pickup using an optical phase plate | Jang-hoon Yoo, Chul-woo Lee, Chong-sam Chung, Kun-ho Cho, Hyun-seob Choi +3 more | 2001-04-24 |
| 6167004 | Error signal detecting apparatus of optical pickup adopting hologram grating | Yong Jae Lee, Tae Kyung Kim, Jang-hoon Yoo, Byung-ryul Ryoo, Yong-Ki Son +1 more | 2000-12-26 |
| 6088170 | Optical system for shaping light beams and an optical pickup employing the same | Chul-woo Lee, Tae Kyung Kim | 2000-07-11 |
| 6081497 | Optical pickup having compatibility with a digital versatile disk and a compact disk-recordable | — | 2000-06-27 |
| 5987924 | Lens mold and method of manufacturing a lens | Chul-woo Lee, Dong-Ho Shin, Kyung-hwa Rim, Chong-sam Chung, Kun-ho Cho +2 more | 1999-11-23 |
| 5872760 | Optical pickup for correcting an astigmatic difference of light | Tae Kyoung Kim, Chul-woo Lee | 1999-02-16 |
| 5870369 | Objective lens device including an objective lens and a transparent member having two light control portions and optical pickup using the objective lens device | Chong-sam Chung, Chul-woo Lee | 1999-02-09 |
| 5822135 | Lens device including a light controlling mechanism and an optical pickup apparatus using a lens device | Chul-woo Lee, Dong-Ho Shin, Kyung-hwa Rim, Chong-sam Chung, Kun-ho Cho +2 more | 1998-10-13 |
| 5701288 | Optical pickup device with light spot size adjustment for different density disks | — | 1997-12-23 |
| 5699340 | Method for correcting aberration due to optical disk tilt and apparatus therefor | Chul-woo Lee, Kyung-hwa Rhim, Chong-sam Chung | 1997-12-16 |
| 5665957 | Lens device comprising light blocking means and an optical pickup apparatus using the lens device | Chul-woo Lee, Dong-Ho Shin, Kyung-hwa Rim, Chong-sam Chung, Kun-ho Cho +2 more | 1997-09-09 |
| 5594714 | Focus error detection with two symmetrically splitted reflected beams | Chul-woo Lee, Kyung-hwa Rim, Chong-sam Chung | 1997-01-14 |