Sughrue, Mion, Zinn, Macpeak & Seas
Optical reporting reproducing device having fixed and movable optical systems
 An optical record reproducing device including a movable optical system for moving along a radial direction of an optical disc, a separated optical system including a light source and a separated fixed optical system, a tracking control system having a reflective mirror for reflecting a laser beam irradiated from the light source toward the movable optical system and an accurate angular displacement mechanism including an angular displacement detector for directly detecting an angular displacement of the reflective mirror so as to control the movable optical system accuarately. 
Seiko Epson Corporation
G
G11B
inventional
Kouichi Hideya Shinji Takashi Hiroyuki Hirokazu
Ebina Seki Haba Takeda Ishikawa Ito