Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – In combination with or also constituting light responsive...
Patent
1996-11-07
1998-09-01
Tran, Minh-Loan
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
In combination with or also constituting light responsive...
257 81, 372 50, H01L 2715
Patent
active
058014020
ABSTRACT:
A light output apparatus and an optical pickup apparatus employing the same are provided. The light output apparatus includes a base, a VCSEL installed on the base for emitting light in a direction normal to the base, and a light output controller for controlling the light output of the VCSEL. The light output controller includes a monitoring photodetector and a housing enclosing the VCSEL and the photodetector. The housing incorporates a projector window for transmitting most of the light emitted from the VCSEL and reflecting some of the light back onto the base. The monitoring photodetector is installed on the base for receiving some of the light emitted from the VCSEL and reflected from the projector window, and converting the light into an electrical signal. A plurality of lead pins are connected to the VCSEL and the monitoring photodetector to facilitate connection to a power supply-and transmission of the electrical signals. In addition to the above, the optical pickup apparatus includes an object lens for concentrating the light on an optical recording medium by collecting light emitted from the VCSEL, a light path changing unit for changing the path of light reflected from the light record medium, and another photodetector for receiving the reflected light and converting it into an electrical signal to be fed to an error detection circuit.
REFERENCES:
patent: 5448536 (1995-09-01), Muranishi et al.
Patent Abstract of Japan, vol. 010, No. 125 (E-402), May 10, 1986, & JP 60 257584 A (Sharp KK), Dec. 19, 1985, *Abstract, Yorigumi et al.
Patent Abstracts of Japan, vol. 018, No. 570 (E-1623), Oct. 31, 1994, & JP 06 207138 A (Seiko Epson Corp), Jul. 26, 1994, *Abstract, Katsumi.
Patent Abstracts of Japan, vol. 009, No. 234 (E-344), Sep. 20, 1985, & JP 60 088486 A (Matsushita Denki Sangyo KK) May 18, 1995, *Abstract, Masahiro et al.
Patent Abstracts of Japan, vol. 016, No. 035 (P-1304), Jan. 28, 1992, & JP 03 242838 A (Matsushita Electric Ind Co Ltd), Oct. 29, 1991, *Abstract, Makoto.
Patent Abstracts of Japan, vol. 017, No. 132 (P-1504), Mar. 18, 1993 & JP 04 311828 A (Hitachi Ltd), Nov. 4, 1992, *Abstract, Shigeru et al.
International Conference of Solid State Devices and Materials, Aug. 1, 1992, pp. 595-597, XP000312274, Hideo Kosaka et al.: "Pixels Consisting of Double Vertical-Cavity Detector and Single Vertical-Cavity Laser Sections For 2-D Bidirectional Optical Interconnections".
Samsung Electronics Co,. Ltd.
Tran Minh-Loan
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