Optics: measuring and testing – By shade or color – With color transmitting filter
Reexamination Certificate
2007-09-27
2010-10-12
Evans, F. L (Department: 2877)
Optics: measuring and testing
By shade or color
With color transmitting filter
C356S425000
Reexamination Certificate
active
07812951
ABSTRACT:
Embodiments include an apparatus including a color sensor including a transmitter portion and a receiver portion, the transmitter portion including a light source operable to generate and transmit a light having a particular range of wavelengths, the receiver portion including a first detector operable to receive a first portion of the light emitted from the transmitter portion and to measure a luminance of the received first portion of the emitted light, and a second detector including a polarization filter, the second detector operable to receive a second portion of the light emitted from the transmitter after the second portion has passed through the polarization filter, and operable to measure a pure color of the received second portion of transmitted light.
REFERENCES:
patent: 4699510 (1987-10-01), Alguard
Delaney, III Patrick J.
Hentchel Shaun Paul
Leard Francis Lawrence
Sheppard Nelson D.
Evans F. L
Miller John M.
Rockwell Automation Technologies Inc.
Schwegman Lundberg et al.
Walbrun William R.
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