Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2003-03-25
2009-02-24
Lee, Patrick J. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S208100, C348S294000
Reexamination Certificate
active
07495202
ABSTRACT:
The central idea of the present invention is that the resetting of the energy store associated with the receiver prior to every detection interval and/or prior to every exposure period, during which the energy stored in the energy store is to be changed in accordance with the output signal of the receiver so as to use the state of the energy store following the reception interval as information about the object may be avoided by setting the sensitivity of the receiver, which determines the level of the output signal at a specified electromagnetic radiation, higher in at least one instance, and lower in at least one instance between two resetting events, or by varying the sensitivity. The noise contribution provided by the resetting operations is hereby avoided, which is why the benefit of the accumulation and/or integration may be exploited across several reception intervals without this noise contribution.
REFERENCES:
patent: 5572074 (1996-11-01), Standley
patent: 6373557 (2002-04-01), Mengel et al.
patent: WO 02/33817 (2002-04-01), None
R. Schwarte et al: “New electrooptical mixing and correlating sensor: facilities and applilcations of the photonic mixer device (PMD)” Proceedings of the Spie, Bellingham, VA, US, vol. 3100, 1997, pp. 245-253.
R. Jeremias et al: “A CMOS photosensor array for 3D imaging using pulsed laser” 2001 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, 2001 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, San Francisco, CA USA, Feb. 5-7, 2001, pp. 252-253 and 452.
R. Schwarte: “dynamic 3D-Vision” 2001 International Symposium on Electron Devices for Microwave and Optoelectronic Applications, EDMO 2001 (Cat. No. 01TH8567), Austria, pp. 241-248.
Brockherde Werner
Hosticka Bedrich
Jeremias Ralf
Schrey Olaf
Fogelson Joel M.
Fried Harvey D.
Laks Joseph J.
Lee Patrick J.
Thomson Licensing
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