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

fYear

1994

fDate

1-4 May 1994

Firstpage

346

Lastpage

352

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic Components and Technology Conference, 1994. Proceedings., 44th

Conference_Location

Washington, DC

Print_ISBN

0-7803-0914-6

Type

conf

DOI

10.1109/ECTC.1994.367566

Filename

367566