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US 5,101,099 AGranted
Image reading device with different reflectivity coefficients in a transparent layer and a substrate
AssigneeFuji Xerox Co., Ltd.
InventorsMasao Funada, Norikazu Yamada, Kazuhisa Ando
Life of this patent
Estimating the term…
Abstract
An image reading device in which light receiving elements formed on a first substrate are disposed in opposition to light emitting elements formed on a second substrate with a transparent layer being interposed therebetween. The transparent layer is made of a material whose reflectivity is smaller than that of the second substrate. In another embodiment, gas layers are provided between the transparent layer and the light emitting elements and the gas therein has an index of refraction less than the second substrate. Light transmitting windows provided in an opaque electrode of the light emitting elements have peripheral portions where no light is emitted.
Claims66
An image reading device comprising:
- a first substrate having a first surface and a second surface opposite said first surface;
- a plurality of light receiving elements formed on said second surface of said first substrate;
- a second substrate having a reflectivity coefficient, a third surface, and a fourth surface opposite said third surface;
- a plurality of light emitting elements formed on said third surface of said second substrate;
- and
- a transparent layer interposed between said second surface and said third surface, said transparent layer having a reflectivity coefficient smaller than the reflectivity coefficient of said second substrate.
3 more elements
An method for making an image reading device comprising the steps of:
- providing a first substrate having a first surface and a second surface opposite said first surface;
- forming a plurality of light receiving elements on said second surface of said first substrate;
- providing a second substrate having a reflectivity coefficient, a third surface, and a fourth surface opposite said third surface;
- forming a plurality of light emitting elements on said third surface of said second substrate;
- and
- providing a transparent layer interposed between said second surface and said third surface, said transparent layer having a reflectivity coefficient smaller than the reflectivity coefficient of said second substrate.
3 more elements
An image reading device comprising:
- a first substrate having a first surface and a second surface opposite said first surface;
- a plurality of light receiving elements formed on said second surface of said first substrate;
- a second substrate having a refractive index, a third surface, and a fourth surface opposite said third surface;
- a plurality of light emitting elements formed on said third surface of said second substrate;
- and
- a transparent layer interposed between said second surface and said third surface, said transparent layer having a plurality of depressions therein in a boundary surface with the plurality of light emitting elements and each of said depressions being filled with gas.
3 more elements
An image reading device comprising:
- a first substrate having a first surface and a second surface opposite said first surface;
- a plurality of light receiving elements formed on said second surface of said first substrate;
- a second substrate having a refractive index, a third surface, and a fourth surface opposite said third surface;
- a plurality of light emitting elements formed on said third surface of said second substrate;
- and
- a gas layer interposed between said second surface and said third surface, said gas layer being filled with a gas having a refractive index less than the refractive index of said second substrate.
3 more elements
An method for making an image reading device comprising the steps of:
- providing a first substrate having a first surface and a second surface opposite said first surface;
- forming a plurality of light receiving elements on said second surface of said first substrate;
- providing a second substrate having an index of refraction , a third surface, and a fourth surface opposite said third surface;
- forming a plurality of light emitting elements on said third surface of said second substrate;
- and
- providing a gas layer between said second surface and said third surface, said gas layer being filled with a gas having an index of refraction smaller than the index of refraction of said second substrate.
3 more elements
An method for making an image reading device comprising the steps of:
- providing a first substrate having a first surface and a second surface opposite said first surface;
- forming a plurality of light receiving elements on said second surface of said first substrate;
- providing a second substrate having an index of refraction, a third surface, and a fourth surface opposite said third surface;
- forming a plurality of light emitting elements on said third surface of said second substrate;
- forming a transparent layer interposed between said second surface and said third surface;
- forming a plurality of depressions in a surface of said transparent layer bounding said the plurality of light emitting elements;
- and
- filling each of said depressions with a gas having an index of refraction less than the index of refraction of said second substrate to form corresponding gas layers between said third surface and said transparent layer.
5 more elements
An image reading device comprising:
- a first substrate having a first surface and a second surface opposite said first surface;
- a plurality of light receiving elements formed on said second surface of said first substrate;
- a second substrate having a refractive index, a third surface, and a fourth surface opposite said third surface;
- elements formed on said third
- a plurality of light emitting surface of said second substrate, said fourth surface being adapted to support an original document such that the document is illuminated by light emitted from said light emitting elements and light reflected by said original surface is incident on said light receiving elements, each of said light emitting elements including a light transmissible window for guiding the reflected light to said light receiving elements, and each of said light emitting elements including a non-light emitting portion along the periphery of said light transmissible window;
- and
- a transparent layer interposed between said second surface and said third surface.
4 more elements
Dependencies are inferred from the claim text.