Title :
LDH (laser/detector/hologram) unit for thin optical pick-up head of CD player
Author :
Yoshikawa, Akio ; Nakanishi, Hideyuki ; Itoh, Kunio ; Yamazaki, Takeshi ; Komino, Tetsuo ; Musha, And Tohru
Author_Institution :
Electron. Res. Lab., Matsushita Electron. Corp., Osaka, Japan
Abstract :
The LDH unit with the size of 4.8×8.2×4.3 mm for a thin optical pickup head of a CD player has been successfully developed. The technology to make the LDH unit thin and small is based upon (1) the most efficient optical combination of the low operation current laser diode with the 45° built-in micro-mirror which is formed on the Si photodetector substrate, (2) the thin plastic-molded flat package with good thermal dissipation, and (3) the plastic-molded holographic optical element (HOE) as a cap. The pick-up head using the LDH unit has shown good optical performance sufficient for the application to CD players
Keywords :
Hi-Fi equipment; holographic optical elements; integrated optoelectronics; laser beam applications; laser mirrors; photodetectors; pick-ups; plastic packaging; semiconductor lasers; 4.3 mm; 4.8 mm; 8.2 mm; CD player; Hi-Fi; Si; Si photodetector substrate; built-in micro-mirror; laser diode; laser/detector/hologram unit; low operation current LD; optical performance; plastic-molded holographic optical element; thermal dissipation; thin optical pickup head; thin plastic-molded flat package; Diode lasers; Holographic optical components; Holography; Lenses; Mirrors; Optical devices; Photodetectors; Photodiodes; Plastic packaging; Surface emitting lasers;
Conference_Titel :
Electronic Components and Technology Conference, 1994. Proceedings., 44th
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-0914-6
DOI :
10.1109/ECTC.1994.367566
