Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2007-10-16
2007-10-16
Epps, Georgia (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S226000
Reexamination Certificate
active
11401828
ABSTRACT:
Described are a method and a photodetector system for determining a wavelength of light. A current generated in a photodetector in response to incident light is determined. The incident light is terminated and a decay current generated by the photodetector is determined. The wavelength of the light is determined according to the current, the decay current and a predetermined correspondence between the current and decay current as a function of wavelength and time. In one embodiment, the decay current is compared to reference decay currents to determine a matched reference decay current and the wavelength of the light is determined according to a wavelength associated with the matched reference decay current.
REFERENCES:
patent: 3659157 (1972-04-01), Nagasawa
patent: 6232602 (2001-05-01), Kerr
patent: 6373055 (2002-04-01), Kerr
patent: 6806469 (2004-10-01), Kerr
patent: 6841816 (2005-01-01), Merrill et al.
patent: 2004/0178463 (2004-09-01), Merrill et al.
patent: 2004/0178466 (2004-09-01), Merrill et al.
patent: 2005/0194653 (2005-09-01), Hynecek et al.
Findlater, K. M. et al.; “A CMOS Image Sensor with a Double-Junction Active Pixel”; IEEE Transactions on Electron Devices, vol. 50, No. 1; Jan. 2003; p. 32-42.
Beyette, Jr. Fred R.
Fearing Christopher James
Wilsey Philip A.
Clifton Labs, Inc.
Ellis Suezu
Guerin William G.
Guerin & Rodriguez LLP
LandOfFree
Method for determining wavelengths of light incident on a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for determining wavelengths of light incident on a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for determining wavelengths of light incident on a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3858815