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US5329384A
Expired / Lapsed
US
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Color image reading apparatus with volume hologram
Assignee: Canon Inc
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Filing: 1993-04-05
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Granted: 1994-07-12
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Expires: 2013-04-05
Abstract
Abstract A color image reading apparatus includes a plurality of line sensors formed by arranging a plurality of one-dimensional sensor arrays on a single substrate, a focusing optical system for focusing an object on the sensors, and a volume hologram, arranged in the optical path between the focusing optical system and the sensors, for color-separating light from the object into a plurality of color components and guiding the plurality of color components to the corresponding one-dimensional sensor arrays.
Inventors
- 👤 Michitaka Setani
- 👤 Naosato Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:50
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/32; H; H04; H04N; H04N1/00; H04N1/46; H04N1/48; H04N1/486; H04N1/488; H04N23/00; H04N23/10; H04N23/13; H04N23/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
79 words
A color image reading apparatus comprising: a plurality of line sensors formed by arranging a plurality of one-dimensional sensor arrays on a single substrate; a focusing optical system for focusing an object on said sensors; and a volume hologram, arranged in an optical path between said focusing optical system and said sensors, for color-separating light from the object into a plurality of color components and guiding the plurality of color components to corresponding ones of said one-dimensional sensor arrays.
Claim 2
Dependent Claim
79 words
A color image reading apparatus comprising: a plurality of line sensors formed by arranging a plurality of one-dimensional sensor arrays on a single substrate; a focusing optical system for focusing an object on said sensors; and a volume hologram, arranged in an optical path between said focusing optical system and said sensors, for color-separating light from the object into a plurality of color components and guiding the plurality of color components to corresponding ones of said one-dimensional sensor arrays.
Claim 3
Dependent Claim
43 words
An apparatus according to claim 1, wherein said volume hologram color-separates an incident light beam into a red light component, a green light component, and a blue light component, the green and blue light components having principal wavelengths satisfying a Bragg diffraction condition.
Claim 4
Dependent Claim
15 words
An apparatus according to claim 1, wherein the volume hologram is formed by multiple exposures.
Claim 5
Dependent Claim
45 words
An apparatus according to claim 1, wherein the volume hologram color-separates an incident light beam into a red light component, a green light component, and a blue light component, at least two of the color light components having principal wavelengths satisfying a Bragg diffraction condition.
Claim 6
Dependent Claim
17 words
An apparatus according to claim 1, wherein the focusing optical system is an exit type telecentric system.
Claim 7
Dependent Claim
14 words
An apparatus according to claim 1, wherein the volume hologram is a reflection type.
Claim 8
Dependent Claim
23 words
An apparatus according to claim 1, wherein the plurality of line sensors are arranged at an equal distance between the respective sensor arrays.
Claim 9
Dependent Claim
69 words
A color image reading apparatus comprising: a plurality of line sensors formed by arranging a plurality of one-dimensional sensor arrays; a focusing optical system for focusing an object on the sensors; and a volume hologram arranged in an optical path between the focusing optical system and the sensors, for color separating light from the object into a plurality of color components corresponding to ones of the one-dimensional sensor arrays.
Claim 10
Dependent Claim
69 words
A color image reading apparatus comprising: a plurality of line sensors formed by arranging a plurality of one-dimensional sensor arrays; a focusing optical system for focusing an object on the sensors; and a volume hologram arranged in an optical path between the focusing optical system and the sensors, for color separating light from the object into a plurality of color components corresponding to ones of the one-dimensional sensor arrays.
Claim 11
Dependent Claim
43 words
An apparatus according to claim 8, wherein the volume hologram color-separates an incident light beam into a red light component, a green light component, and a blue light component, the green and blue light components having principal wavelengths satisfying a Bragg diffraction condition.
Claim 12
Dependent Claim
15 words
An apparatus according to claim 8, wherein the volume hologram is formed by multiple exposures.
Claim 13
Dependent Claim
45 words
An apparatus according to claim 8, wherein the volume hologram color-separates an incident light beam into a red light component, a green light component, and a blue light component, at least two of the color light components having principal wavelengths satisfying a Bragg diffraction condition.
Claim 14
Dependent Claim
17 words
An apparatus according to claim 8, wherein the focusing optical system is an exit type telecentric system.
Claim 15
Dependent Claim
14 words
An apparatus according to claim 8, wherein the volume hologram is a reflection type.
Claim 16
Dependent Claim
23 words
An apparatus according to claim 8, wherein the plurality of line sensors are arranged at an equal distance between the respective sensor arrays.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-11 | 1998-01-10 | 1998-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-11 | 2002-01-10 | 2002-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-11 | 2006-01-10 | 2006-07-12 | $7700.00 | Window Closed / Lapsed |