READING MODULE, AND IMAGE READING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME
First Claim
1. A reading module comprising:
- a light source for illuminating a document;
an optical system for forming an image of reflection light from the document illuminated by the light source, as image light; and
a sensor including a plurality of sensor chips adjacently arranged in a main scanning direction for converting the image light formed by the optical system into an electric signal, whereinthe optical system includea mirror array including a plurality of reflecting mirrors connected in an array in the main scanning direction, each of the reflecting mirrors having an aspheric reflecting surface,first aperture stops each being disposed between each of the reflecting mirrors and each of the sensor chips, so as to adjust light amount of the image light reflected from each of the reflecting mirrors,second aperture stops each extending in a tapered shape from an opening edge of each of the first aperture stops toward the mirror array,first light shielding walls each being formed to extend from a boundary between the sensor chips toward the first aperture stops, so as to shield stray light entering each of the sensor chips, andsecond light shielding walls being formed to extend from both sides in the main scanning direction of each of the first aperture stops toward the sensor chips, so as to shield the stray light entering each of the sensor chips.
1 Assignment
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Accused Products
Abstract
A reading module includes a light source, an optical system for forming an image of reflection light from a document illuminated by the light source, and a sensor including a plurality of sensor chips to convert the image light formed by the optical system into an electric signal. The optical system includes a mirror array including a plurality of reflecting mirrors connected in the main scanning direction, first aperture stops each of which adjusts light amount of the image light reflected from each of the reflecting mirrors, second aperture stops each extending from the opening edge of the first aperture stop toward the mirror array, first light shielding walls each of which extends from a boundary between the sensor chips toward the first aperture stops, and second light shielding walls extending from both sides in the main scanning direction of the first aperture stop toward the sensor chips.
11 Citations
7 Claims
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1. A reading module comprising:
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a light source for illuminating a document; an optical system for forming an image of reflection light from the document illuminated by the light source, as image light; and a sensor including a plurality of sensor chips adjacently arranged in a main scanning direction for converting the image light formed by the optical system into an electric signal, wherein the optical system include a mirror array including a plurality of reflecting mirrors connected in an array in the main scanning direction, each of the reflecting mirrors having an aspheric reflecting surface, first aperture stops each being disposed between each of the reflecting mirrors and each of the sensor chips, so as to adjust light amount of the image light reflected from each of the reflecting mirrors, second aperture stops each extending in a tapered shape from an opening edge of each of the first aperture stops toward the mirror array, first light shielding walls each being formed to extend from a boundary between the sensor chips toward the first aperture stops, so as to shield stray light entering each of the sensor chips, and second light shielding walls being formed to extend from both sides in the main scanning direction of each of the first aperture stops toward the sensor chips, so as to shield the stray light entering each of the sensor chips. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification