READING MODULE AND IMAGE READING DEVICE AND IMAGE FORMING APPARATUS THEREWITH
First Claim
1. A reading module comprising:
- a light source which radiates light to a document;
an optical system which images, as image light, reflected light of the light radiated from the light source to the document; and
a sensor in which a plurality of imaging regions for converting the image light imaged by the optical system into an electrical signal are arranged next to each other in a main scanning direction, whereinthe optical system comprises;
a mirror array in which a plurality of reflection mirrors whose reflection surfaces are aspherical concave surfaces are coupled together in an array in the main scanning direction; and
a plurality of aperture stop portions each provided in an optical path of the image light between a reflection mirror and an imaging region of the sensor, the plurality of aperture stop portions each having;
a first aperture which adjusts an amount of the image light reflected from the reflection mirror; and
a second aperture formed on a mirror array side of the first aperture, the second aperture shielding stray light that enters the first aperture from an adjacent reflection mirror, andbetween the first aperture and the second aperture, a reflection reduction mechanism is provided that reduces reflection, toward the first aperture, of light other than the image light traveling from the second aperture to the first aperture.
1 Assignment
0 Petitions
Accused Products
Abstract
A reading module has a light source, an optical system, and a sensor. The optical system images, as image light, reflected light of light radiated from the light source to a document. In the sensor, the image light imaged by the optical system is converted into an electrical signal. The optical system has a mirror array and an aperture stop portion. In the mirror array, reflection mirrors are coupled together in an array in the main scanning direction. The aperture stop portion has a first aperture adjusting the amount of the image light reflected from a reflection mirror and a second aperture shielding stray light entering the first aperture from an adjacent reflection mirror. Between the first and second apertures, a reflection reduction mechanism is provided that reduces reflection, toward the first aperture, of light other than the image light traveling from the second to first aperture.
-
Citations
15 Claims
-
1. A reading module comprising:
-
a light source which radiates light to a document; an optical system which images, as image light, reflected light of the light radiated from the light source to the document; and a sensor in which a plurality of imaging regions for converting the image light imaged by the optical system into an electrical signal are arranged next to each other in a main scanning direction, wherein the optical system comprises; a mirror array in which a plurality of reflection mirrors whose reflection surfaces are aspherical concave surfaces are coupled together in an array in the main scanning direction; and a plurality of aperture stop portions each provided in an optical path of the image light between a reflection mirror and an imaging region of the sensor, the plurality of aperture stop portions each having; a first aperture which adjusts an amount of the image light reflected from the reflection mirror; and a second aperture formed on a mirror array side of the first aperture, the second aperture shielding stray light that enters the first aperture from an adjacent reflection mirror, and between the first aperture and the second aperture, a reflection reduction mechanism is provided that reduces reflection, toward the first aperture, of light other than the image light traveling from the second aperture to the first aperture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
Specification