Imaging apparatus which adjusts for dark noise and readout...

Details Imaging apparatus which adjusts for dark noise and readout... Imaging apparatus which adjusts for dark noise and readout...

2006-03-07

2006-03-07

Leubecker, John (Department: 3739)

Surgery

Endoscope

With camera or solid state imager

C348S076000, C348S241000

Reexamination Certificate

active

07008374

ABSTRACT:
An imaging apparatus using a charge multiplying solid-sate imaging device for use with an endoscope system, etc., capable of providing an output signal with an improved S/N ratio by reducing the dark noise. The full well size of the CCD imaging device is reduced to 1/M of the number of electrons corresponding to a maximum amount of light which may be received by the individual pixel determined by the technical specifications of the system, and the signal charges are read out N times in a prescribed time period corresponding to a time for a single frame in a TV frame rate. The system satisfies the relation, nd (1−1/M)>nr2(N2−1), assuming that nd is the dark noise and nr is the readout noise contained in single reading from a reference solid-state imaging means having a full well size equivalent to the number of electrons described above.

REFERENCES:
patent: 5264940 (1993-11-01), Komiya et al.
patent: 5337340 (1994-08-01), Hynecek
patent: 6760058 (2004-07-01), Hakamata
patent: 7-176721 (1995-07-01), None

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