CONTACT IMAGE SENSOR USING SWITCHABLE BRAGG GRATINGS
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Jan 7, 2013
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Jan 6, 2012
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Abstract
A contact image sensor having: an illumination; a first SBG array device; a transmission grating; a second SBG array device; a waveguiding layer having a multiplicity of waveguide cores separated by cladding material; an upper clad layer; and a platen. The sensor also including an optical device for coupling light from an illumination source into the first SBG array; and an optical coupler for coupling light out of the cores into output optical paths coupled to a detector having at least one photosensitive element.
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