Hybrid optical pickup with integrated power emission and reading

Details Hybrid optical pickup with integrated power emission and reading Hybrid optical pickup with integrated power emission and reading

1990-12-19

1992-08-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

369112, H01J 4014, G11B 712

Patent

active

051361523

ABSTRACT:
A compact hybrid laser and photodetector device is disclosed. A heat sink and a metal layer are bonded together, and then mounted on a circuit board. A semiconductor laser chip is mounted on the metal layer. The edge of the metal layer serves as a bonding pad for a wire connection to a bonding pad on the circuit board. A rear-facet photodetector is mounted on the circuit board beneath the semiconductor laser chip. A multiple element photodetector is also mounted on the circuit board for detecting a signal reflected off a media. Preferably, the rear facet and multiple element photodetectors are a single integrated circuit.

REFERENCES:
patent: 4731772 (1988-03-01), Lee
patent: 4757197 (1988-07-01), Lee
patent: 4789977 (1988-12-01), Oudenhuysen et al.
patent: 4847848 (1989-07-01), Inoue et al.
patent: 4894815 (1990-01-01), Yamanaka et al.
patent: 5062098 (1991-10-01), Hori et al.

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