Patent EP0141508B1 successfully refreshed from Google Patents.
US4769718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image processing apparatus
Assignee: Ushio Denki KK
•
Filing: 1986-12-29
•
Granted: 1988-09-06
•
Expires: 2006-12-29
Abstract
Abstract An image processing apparatus is equipped with an original document illuminating lamp, a reflector arranged in association with the lamp and having a color-compensating anodic oxidation coating formed on at least a part of a reflecting surface of the reflector, and a photosensitive member adapted to receive light from an original document upon exposure of the original document to light from the lamp and having an oversensitive range in the spectral sensitivity characteristics thereof. The reflector is made of aluminum or an aluminum alloy. Owing to the provision of the color-compensating anodic oxidation coating, the reflectivity of the reflector to light in a wavelength region corresponding to the oversensitive range of the photosensitive member is smaller than its reflectivity to light in wavelength region other than the first-mentioned wavelength region.
Inventors
- 👤 Kenji Imamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:36
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/02815; H04N1/02845; H04N1/0285; H04N1/0287
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
133 words
An image processing apparatus equipped with an original document illuminating lamp, a reflector arranged in association with the lamp and having a color-compensating anodic oxidation coating formed on at least a part of a reflecting surface of the reflector, and a photosensitive member adapted to receive light from an original document upon exposure of the original document to light from the lamp and having an oversensitive range in the spectral sensitivity characteristics thereof, characterized in that the reflector is made of aluminum or an aluminum alloy and owing to the provision of the color-compensating anodic oxidation coating, the reflectivity of the reflector to light in a wavelength region corresponding to the oversensitive range of the photosensitive member is smaller than its reflectivity to light in wavelength region other than the first-mentioned wavelength region.
Claim 2
Dependent Claim
133 words
An image processing apparatus equipped with an original document illuminating lamp, a reflector arranged in association with the lamp and having a color-compensating anodic oxidation coating formed on at least a part of a reflecting surface of the reflector, and a photosensitive member adapted to receive light from an original document upon exposure of the original document to light from the lamp and having an oversensitive range in the spectral sensitivity characteristics thereof, characterized in that the reflector is made of aluminum or an aluminum alloy and owing to the provision of the color-compensating anodic oxidation coating, the reflectivity of the reflector to light in a wavelength region corresponding to the oversensitive range of the photosensitive member is smaller than its reflectivity to light in wavelength region other than the first-mentioned wavelength region.
Claim 3
Dependent Claim
28 words
The image processing apparatus as claimed in claim 1, wherein the photosensitive member is a photoelectric member making use of photovoltaic effects of a p-n junction of silicon.
Claim 4
Dependent Claim
20 words
The image processing apparatus as claimed in claim 1, wherein the original document illuminating lamp is a halogen incandescent lamp.
Claim 5
Dependent Claim
23 words
The image processing apparatus as claimed in claim 1, wherein the thickness of the color-compensating anodic oxidation coating is 1 μm or less.
Claim 6
Dependent Claim
32 words
The image processing apparatus as claimed in claim 1, wherein the reflector is divided into plural sections and the color-compensating anodic oxidation coating is formed on at least on of the sections.
Claim 7
Dependent Claim
57 words
The image processing apparatus as claimed in claim 5, wherein the reflector is divided into plural sections including first reflector and second reflector sections, light reflected by the first reflector section travels directly toward the original document, and light reflected by the second reflector section travels toward the original document by way of the first reflector section.
Claim 8
Dependent Claim
134 words
An image processing apparatus equipped with an original document illuminating lamp, a reflector arranged surrounding the lamp and having a color-compensating anodic oxidation coating formed on at least a part of a reflecting surface of the reflector, and a photosensitive member comprising a photoconductor adapted to receive light from an original document upon exposure of the original document to light from the lamp and having an oversensitive range in the spectral sensitivity characteristics thereof, characterized in that the reflector is made of aluminum or an aluminum alloy and owing to the provision of the color-compensating anodic oxidation coating, the reflectivity of the reflector to light in a wavelength region corresponding to the oversensitive range of the photosensitive member is smaller than its reflectivity to light in wavelength region other than the first-mentioned wavelength region.
Claim 9
Dependent Claim
134 words
An image processing apparatus equipped with an original document illuminating lamp, a reflector arranged surrounding the lamp and having a color-compensating anodic oxidation coating formed on at least a part of a reflecting surface of the reflector, and a photosensitive member comprising a photoconductor adapted to receive light from an original document upon exposure of the original document to light from the lamp and having an oversensitive range in the spectral sensitivity characteristics thereof, characterized in that the reflector is made of aluminum or an aluminum alloy and owing to the provision of the color-compensating anodic oxidation coating, the reflectivity of the reflector to light in a wavelength region corresponding to the oversensitive range of the photosensitive member is smaller than its reflectivity to light in wavelength region other than the first-mentioned wavelength region.
Claim 10
Dependent Claim
72 words
The image processing apparatus as claimed in claim 7, wherein the photosensitive member has the oversensitive range in a wavelength range of 400-550 nm and the chromaticity of said part of the reflecting surface, on which the color-compensating anodic oxidation coating is formed, falls within a range defined by the following equations (1)-(3) on the chromaticity coordinates of an XYZ colorimetric chromaticity diagram: y≦2.25x-0.235 Eq. 1 y≧-0.875x+0.7025 Eq. 2 y≧x-0.16. Eq. 3
Claim 11
Dependent Claim
72 words
The image processing apparatus as claimed in claim 7, wherein the photosensitive member has the oversensitive range in a wavelength range of 550-650 nm and the chromaticity of said part of the reflecting surface, on which the color-compensating anodic oxidation coating is formed, falls within a range defined by the following equations (4)-(6) on the chromaticity coordinates of an XYZ colorimetric chromaticity diagram: y≦0.1778x-0.3338 Eq. 4 y≦-10x+2.98 Eq. 5 y≧1.1667x-0.1467. Eq. 6
Claim 12
Dependent Claim
20 words
The image processing apparatus as claimed in claim 7, wherein the original document illuminating lamp is a halogen incandescent lamp.
Claim 13
Dependent Claim
23 words
The image processing apparatus as claimed in claim 7, wherein the thickness of the color-compensating anodic oxidation coating is 1 μm or less.
Claim 14
Dependent Claim
32 words
The image processing apparatus as claimed in claim 7, wherein the reflector is divided into plural sections and the color-compensating anodic oxidation coating is formed on at least one of the sections.
Claim 15
Dependent Claim
57 words
The image processing apparatus as claimed in claim 12, wherein the reflector is divided into plural sections including first reflector and second reflector sections, light reflected by the first reflector section travels directly toward the original document, and light reflected by the second reflector section travels toward the original document by way of the first reflector section.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |