METHOD AND APPARATUS FOR CONTACT IMAGE SENSING
First Claim
Patent Images
1. A waveguide device comprising:
- an optical substrate with first and second light reflecting surfaces; and
a light absorbing coating applied to at least one of said surfaces with portions of the coating removed to provide at least one non-absorbing region disposed between light absorbing regions,each said non-absorbing region of said first surface overlapping a non-absorbing region of said second surface to form a waveguiding volume within said substrate.
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Abstract
A contact image sensor having an illumination source; a first SBG array device; a transmission grating; a second SBG array device; a waveguiding layer including a multiplicity of waveguide cores separated by cladding material; an upper clad layer; and a platen. The sensor further includes: an input element for coupling light from the illumination source into the first SBG array; a coupling element for coupling light out of the cores into output optical paths coupled to a detector having at least one photosensitive element.
58 Citations
20 Claims
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1. A waveguide device comprising:
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an optical substrate with first and second light reflecting surfaces; and a light absorbing coating applied to at least one of said surfaces with portions of the coating removed to provide at least one non-absorbing region disposed between light absorbing regions, each said non-absorbing region of said first surface overlapping a non-absorbing region of said second surface to form a waveguiding volume within said substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification