IMAGE SENSING APPARATUS
First Claim
1. An image sensing apparatus, comprising:
- a light source that shines light on an illumination portion of a document across the entire range in a primary scan direction;
a first mirror that receives incident light scattered by reflection from the document, to reflect the scattered light in a secondary scan direction;
a plurality of first concaved aspheric mirrors that collimates light beams from the first mirror, to reflect therefrom the collimated light beams as substantially collimated light fluxes;
an aperture mirror that reflects therefrom the light beams from the first aspheric mirrors, through apertures each having a light-shielded portion formed therearound and selectively passing the light beams therethrough;
a plurality of second concaved aspheric mirrors that receives light beams incident from the aperture mirror, to reflect the incident light beams as converging light beams;
a second mirror that reflects the light beams in a direction perpendicular to the surface of the document, disposed on a path of the light beams to be converged by means of the respective second aspheric mirrors;
a plurality of light receivers each having a light-receiving area where the light beams from the second mirrors are incident, and images are thereby formed according to the light beams from the respective apertures; and
a casing where at least the first and second aspheric mirrors are disposed on a first side of the casing in the secondary scan direction and the aperture mirror is disposed on a second side thereof in the secondary scan direction.
1 Assignment
0 Petitions
Accused Products
Abstract
An image sensing apparatus having a large depth of focus (DOF) and being compact in size is provided. The image sensing apparatus includes a plurality of light sources that shines light beams on an illumination portion of a document; a first mirror that receives incident light scattered by reflection from the document, to reflect the scattered light in the secondary scan direction; a plurality of first concaved aspheric mirrors that collimates light beams from the first mirror, to reflect therefrom the collimated light beams as substantially collimated light fluxes; an aperture mirror that reflects therefrom the light beams from the respective first aspheric mirrors, through apertures each having a light-shielded portion formed therearound and selectively passing the light beams therethrough; a plurality of second concaved aspheric mirrors that receives the light beams incident from the respective aperture mirror, to reflect the incident light beams as converging light beams; a second mirror that reflects the light beams in a direction perpendicular to the surface of the document, disposed on a path of the light beams to be converged by means of the second aspheric mirrors; a plurality of light receivers each having a light-receiving area that receives the light beams from the second mirrors, to form images according to the light beams from the respective apertures; and a casing where the first and second aspheric mirrors are disposed on a first side of the casing in the secondary scan direction, and the aperture mirror is disposed on a second side thereof in the secondary scan direction.
15 Citations
16 Claims
-
1. An image sensing apparatus, comprising:
-
a light source that shines light on an illumination portion of a document across the entire range in a primary scan direction; a first mirror that receives incident light scattered by reflection from the document, to reflect the scattered light in a secondary scan direction; a plurality of first concaved aspheric mirrors that collimates light beams from the first mirror, to reflect therefrom the collimated light beams as substantially collimated light fluxes; an aperture mirror that reflects therefrom the light beams from the first aspheric mirrors, through apertures each having a light-shielded portion formed therearound and selectively passing the light beams therethrough; a plurality of second concaved aspheric mirrors that receives light beams incident from the aperture mirror, to reflect the incident light beams as converging light beams; a second mirror that reflects the light beams in a direction perpendicular to the surface of the document, disposed on a path of the light beams to be converged by means of the respective second aspheric mirrors; a plurality of light receivers each having a light-receiving area where the light beams from the second mirrors are incident, and images are thereby formed according to the light beams from the respective apertures; and a casing where at least the first and second aspheric mirrors are disposed on a first side of the casing in the secondary scan direction and the aperture mirror is disposed on a second side thereof in the secondary scan direction. - View Dependent Claims (3, 4, 5, 6, 7, 8)
-
-
2. An image sensing apparatus, comprising:
-
a light source that shines light on an illumination portion of a document across the entire range in a primary scan direction; a first mirror that receives incident light scattered by reflection from the document, to reflect the scattered light in a secondary scan direction; a plurality of first concaved aspheric mirrors that collimates the light beams from the first mirror, to reflect therefrom the collimated light beams as substantially collimated light fluxes; an aperture mirror that reflects therefrom the light beams from the first aspheric mirrors, through apertures each having a light-shielded portion formed therearound and selectively passing the light beams therethrough; a plurality of second concaved aspheric mirrors that receives the light beams incident from the aperture mirror, to reflect the incident light beams as converging light beams; a second mirror that reflects the light beams in a direction perpendicular to the surface of the document, disposed on a path of the light beams to be converged by means of the respective second aspheric mirrors;
a plurality of light receivers each having a light-receiving area where the light beams from the second mirrors are incident and images are thereby formed according to the light beams from the respective apertures; anda casing where at least the first and second aspheric mirrors are arranged in respective arrays on a first side of the casing in the secondary scan direction, along the primary scan direction and the apertures and the aperture mirror is arranged in respective arrays on a second side thereof in the secondary scan direction, therealong.
-
-
9. An image sensing apparatus, comprising:
-
an RGB light source that shines light on an illumination portion of a document across the entire range in a primary scan direction; a first mirror that receives incident light scattered by reflection from the document, to reflect the scattered light in a secondary scan direction; a plurality of first concaved aspheric mirrors that collimates light beams from the first mirror, to reflect therefrom the collimated light beams as substantially collimated light fluxes; an aperture mirror that reflects therefrom the light beams from the first aspheric mirrors, through apertures each having a light-shielded portion formed therearound and selectively passing the light beams therethrough; a plurality of second concaved aspheric mirrors that receives light beams incident from the aperture mirror, to reflect the incident light beams as converging light beams; a second mirror that reflects the light beams in a direction perpendicular to the surface of the document, disposed on a path of the light beams to be converged by means of the respective second aspheric mirrors; a plurality of light receivers each having RGB filters corresponding to the respective optical wavelengths of the RGB light beams in a light-receiving area where the light beams from the second mirrors are incident and images are thereby formed according to the light beams from the respective apertures; and a casing where at least the first and second aspheric mirrors are disposed on a first side of the casing in the secondary scan direction and the aperture mirror is disposed on a second side thereof in the secondary scan direction;
-
-
10. An image sensing apparatus, comprising:
-
an RGB light source that shines light on an illumination portion of a document across the entire range in a primary scan direction; a first mirror that receives incident light scattered by reflection from the document, to reflect the scattered light in a secondary scan direction; a plurality of first concaved aspheric mirrors that collimates light beams from the first mirror, to reflect therefrom the collimated light beams as substantially collimated light fluxes; an aperture mirror that reflects therefrom the light beams from the first aspheric mirrors, through apertures each having a light-shielded portion formed therearound and selectively passing the light beams therethrough; a plurality of second concaved aspheric mirrors that receives light beams incident from the aperture mirror, to reflect the incident light beams as converging light beams; a second mirror that reflects the light beams in a direction perpendicular to the surface of the document, disposed on a path of the light beams to be converged by means of the respective second aspheric mirrors; a plurality of light receivers each having RGB filters corresponding to the respective optical wavelengths of the RGB light beams in a light-receiving area where the light beams from the second mirrors are incident and images are thereby formed according to the light beams from the respective apertures; and a casing where at least the first and second aspheric mirrors are arranged in respective arrays on a first side of the casing in the secondary scan direction, along the primary scan direction and the apertures and the aperture mirror are arranged in an array on a second side thereof in the secondary scan direction, therealong. - View Dependent Claims (11, 12)
-
-
13. An image sensing apparatus, comprising:
-
a fluorescent light source that shines fluorescent light on an illumination portion of a document across the entire range in a primary scan direction;
a first mirror that receives incident light scattered by reflection from the document, to reflect the scattered light in a secondary scan direction;
a plurality of first concaved aspheric mirrors that collimates light beams from the first mirror, to reflect therefrom the collimated light beams as substantially collimated light fluxes;an aperture mirror that reflects therefrom the light beams from the first aspheric mirrors, through apertures each having a light-shielded portion formed therearound and selectively passing the light beams therethrough; a plurality of second concaved aspheric mirrors that receives the light beams incident from the aperture mirror, to reflect the incident light beams as converging light beams; a second mirror that reflects the light beams in a direction perpendicular to the surface of the document, disposed on a path of the light beams to be converged by means of the respective second aspheric mirrors; a plurality of light receivers that includes filters of a plurality of different light colors each having a wavelength longer than that of the blue light, in a light-receiving area where the light beams from the second mirrors are incident and images are thereby formed according to the light beams from the respective apertures; a casing where at least the first and second aspheric mirrors are disposed on a first side of the casing in the secondary scan direction and the aperture mirror is disposed on a second side thereof in the secondary scan direction; and a low-cut filter that cuts off light of wavelengths shorter than that of blue light, provided in the path of the light passing from the fluorescent light source to the document.
-
-
14. An image sensing apparatus, comprising:
-
a fluorescent light source that shines fluorescent light on an illumination portion of a document across the entire range in a primary scan direction; a first mirror that receives incident light scattered by reflection from the document, to reflect the scattered light in a secondary scan direction; a plurality of first concaved aspheric mirrors that collimates light beams from the first mirror, to reflect therefrom the collimated light beams as substantially collimated light fluxes; an aperture mirror that reflects therefrom the light beams from the first aspheric mirrors, through apertures each having a light-shielded portion formed therearound and selectively passing the light beams therethrough; a plurality of second concaved aspheric mirrors that receives the light beams incident from the aperture mirror, to reflect the incident the light beams as converging light beams; a second mirror that reflects the light beams in a direction perpendicular to the surface of the document, disposed on a path of the light beams to be converged by means of the respective second aspheric mirrors; a plurality of light receivers that includes filters of a plurality of different light colors each having a wavelength longer than that of the blue light, in a light-receiving area where the light beams from the second mirrors are incident, and images are thereby formed according to the light beams from the respective apertures; a casing where at least the first and second aspheric mirrors are arranged in respective arrays on a first side of the casing in the secondary scan direction, along the primary scan direction and the apertures and the aperture mirror are arranged in respective arrays on a second side thereof in the secondary scan direction, therealong; and a low-cut filter that cuts off light of wavelengths shorter than that of blue light, provided in the path of the light passing from the fluorescent light source to the document. - View Dependent Claims (15, 16)
-
Specification