Composite optical device

Details Composite optical device Composite optical device

1996-02-26

1998-02-17

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

2502085, 250216, 369 4441, H03J 314

Patent

active

057193894

ABSTRACT:
A laser coupler comprises photodiodes formed on a photodiode IC, a microprism mounted on the photodiode IC to lie on the photodiodes, and a semiconductor laser mounted nearby on the photodiode IC such that a beam of light entering into the microprism through its incident surface is bifurcated and introduced onto the photodiodes. A difference between the amount of incident light to one of the photodiodes and the amount of incident light to the other of the photodiodes is corrected by adjusting a difference between the gain of a current-voltage converter amplifier coupled to one of the photodiodes and the gain of a current-voltage converter amplifier coupled to the other photodiode. Thus, the laser coupler can be fabricated economically.

REFERENCES:
patent: 5350917 (1994-09-01), Taniguchi et al.
patent: 5396061 (1995-03-01), Taniguchi et al.
patent: 5461224 (1995-10-01), Asoma et al.

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