TWO DIMENSIONAL CONTACT IMAGE SENSOR WITH FRONTLIGHTING
First Claim
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1. An image sensor comprising:
- an array of photodetectors directed towards a first side of said array of photodetectors;
one or more emitters directed towards said first side of said array of photodetectors, said one or more emitters emitting light of a first wavelength when illuminated by light of a second wavelength;
a light source for illuminating said one or more emitters, said light source emitting light of said second wavelength; and
a filter for preventing light of said second wavelength from illuminating said photodetectors.
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Abstract
A two-dimensional image sensor is disclosed. The image sensor includes an array of photodetectors directed towards a first side. Emitters directed towards the first side are also provided, with the emitters emitting infrared light when illuminated by ultraviolet light. An ultraviolet light source is provided for illuminating the emitters, and a filter prevents ultraviolet light from illuminating the photodetectors.
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9 Claims
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1. An image sensor comprising:
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an array of photodetectors directed towards a first side of said array of photodetectors; one or more emitters directed towards said first side of said array of photodetectors, said one or more emitters emitting light of a first wavelength when illuminated by light of a second wavelength; a light source for illuminating said one or more emitters, said light source emitting light of said second wavelength; and a filter for preventing light of said second wavelength from illuminating said photodetectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification