Photo detector for weak light

Details Photo detector for weak light Photo detector for weak light

2006-07-18

2006-07-18

Allen, Stephone B. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140VT, C250S214100, C257S257000, C313S1030CM, C313S104000

Reexamination Certificate

active

07078667

ABSTRACT:
This invention provides a photodetector for weak light and a weak light detection system including the photodetector for weak light the photodetector for weak light is comprised of a substrate on which an integrating read circuit including a PIN photodiode or an APD and an FET is mounted, wherein the entire assembly is mounted while separating the substrate from a ground potential without grounding the substrate, such a photodetector for weak light can reduce noise and ensure a high enough sensitivity enough to be able to discriminate the number of photons.

REFERENCES:
patent: 5200780 (1993-04-01), Koichi
patent: 6046446 (2000-04-01), Kameshima et al.
patent: 6359293 (2002-03-01), Woodward
Aaron J. Miller et al.; Applied Physics Letters, vol. 83, No. 4, pp. 791-793, Jul. 28, 2003. Discussed in the specification.

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