Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2006-10-31
2006-10-31
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C313S1030CM, C313S1050CM
Reexamination Certificate
active
07129464
ABSTRACT:
A low-photon flux image-intensified electronic camera comprises a gallium arsenide phosphide (GaAsP) photocathode in a high vacuum tube assembly behind a hermetic front seal to receive image photons. Such is cooled by a Peltier device to −20° C. to 0° C., and followed by a dual microchannel plate. The microchannels in each plate are oppositely longitudinally tilted away from the concentric to restrict positive ions that would otherwise contribute to the generation high brightness “scintillation” noise events at the output of the image. A phosphor-coated output fiberoptic conducts intensified light to an image sensor device. This too is chilled and produces a camera signal output. A high voltage power supply connected to the dual microchannel plate provides for gain control and photocathode gating and shuttering. A fiberoptic taper is used at the output of the image intensifier vacuum tube as a minifier between the internal output fiberoptic and the image sensor.
REFERENCES:
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“Validation of a Noninvasive, Real-Time Imaging Technology Using BioluminescentEscherichia coliin the Neutropenic Mouse Thigh Model of Infection”, Antimicrobial Agents and Chemotherapy, Jan. 2001, p. 129-137, vol. 45, No.
Ko Tony
Law Offices of Thomas E. Schatzel, PC
Luu Thanh X.
Schatzel Thomas E.
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