US4641944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image exposing apparatus
Assignee: Canon Inc
•
Filing: 1985-06-17
•
Granted: 1987-02-10
•
Expires: 2005-06-17
Abstract
Abstract An image exposing apparatus comprises a focusing optical system for focusing an image onto a photosensitive member and having a one-line array of a plurality of focusing light transmission media, and light intensity distribution correction means arranged in a light path for forming the image for eliminating an ununiformity of light intensity on the photosensitive member due to the focusing optical system.
Inventors
- 👤 Haruhisa Honda
- 👤 Hiroaki Tsuchiya
- 👤 Michitaka Setani
- 👤 Mitsuhiro Tokuhara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:21
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/522; G03B27/525; G03B27/528
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
112 words
An image exposing apparatus comprising: a focusing optical system for focusing an image onto a photosensitive member, said focusing optical system being constructed by one-line array of a plurality of converging light transmission media; and light intensity distribution correction means arranged in a light path for forming said image for eliminating a non-uniformity of light intensity on said photosensitive material due to said focusing optical system, said light intensity distribution correction means having a shape to block light fluxes each passing through a center area of each of said converging light transmission media and having a repetitive pattern arranged at a pitch corresponding to a pitch of said converging light transmission media.
Claim 2
Dependent Claim
112 words
An image exposing apparatus comprising: a focusing optical system for focusing an image onto a photosensitive member, said focusing optical system being constructed by one-line array of a plurality of converging light transmission media; and light intensity distribution correction means arranged in a light path for forming said image for eliminating a non-uniformity of light intensity on said photosensitive material due to said focusing optical system, said light intensity distribution correction means having a shape to block light fluxes each passing through a center area of each of said converging light transmission media and having a repetitive pattern arranged at a pitch corresponding to a pitch of said converging light transmission media.
Claim 3
Dependent Claim
78 words
An image exposing apparatus comprising: a focusing optical system for focusing an image onto a photosensitive member, said focusing optical system being constructed by one-line array of a plurality of converging light transmission media; and light intensity distribution correction means arranged in a light path for forming said image for eliminating a non-uniformity of light intensity on said photosensitive material due to said focusing optical system, said light intensity distribution correction means including a linear light blocking member.
Claim 4
Dependent Claim
78 words
An image exposing apparatus comprising: a focusing optical system for focusing an image onto a photosensitive member, said focusing optical system being constructed by one-line array of a plurality of converging light transmission media; and light intensity distribution correction means arranged in a light path for forming said image for eliminating a non-uniformity of light intensity on said photosensitive material due to said focusing optical system, said light intensity distribution correction means including a linear light blocking member.
Claim 5
Dependent Claim
24 words
An image exposing apparatus according to claim 2 wherein said linear light blocking member has a varying width along a direction of said array.
Claim 6
Dependent Claim
111 words
An image exposing apparatus comprising: a document sheet mount table; means for illuminating a document sheet; a focusing optical system for forming an image of said document sheet and having a one-line array of a plurality of converging light transmission media; photosensitive member for sensing the image of said focusing optical system; means arranged between said photosensitive member and said table for suppressing an non-uniformity ΔI of exposure amount on said photosensitive member due to a focusing characteristic of said focusing optical system to less than 1.5%, where ΔI=(I max-I min)/I max, I max is a maximum light intensity on said photosensitive member and I min is a minimum light intensity.
Claim 7
Dependent Claim
111 words
An image exposing apparatus comprising: a document sheet mount table; means for illuminating a document sheet; a focusing optical system for forming an image of said document sheet and having a one-line array of a plurality of converging light transmission media; photosensitive member for sensing the image of said focusing optical system; means arranged between said photosensitive member and said table for suppressing an non-uniformity ΔI of exposure amount on said photosensitive member due to a focusing characteristic of said focusing optical system to less than 1.5%, where ΔI=(I max-I min)/I max, I max is a maximum light intensity on said photosensitive member and I min is a minimum light intensity.
Claim 8
Dependent Claim
26 words
An image exposing apparatus according to claim 4 wherein said photosensitive member is a photosensitive drum on which the image of the document sheet is formed.
Claim 9
Dependent Claim
18 words
An image exposing apparatus according to claim 4 wherein said photosensitive member is a photoelectric conversion image sensor.
Claim 10
Dependent Claim
105 words
An image exposing apparatus comprising: a focusing optical system for focusing a light flux bearing image information onto a photosensitive member and having a one-line array of a plurality of converging light transmission media; means arranged in a light path for exposing said image for correcting an ununiformity of light intensity on said photosensitive member due to said focusing optical system; a degree M of overlapping of images defined by M=Xo/D, where D is an effective diameter of said converging light transmission medium and Xo is a radius of view field on said photosensitive member, being selected to a vicinity of 2.75, 3.25 or 3.75.
Claim 11
Dependent Claim
105 words
An image exposing apparatus comprising: a focusing optical system for focusing a light flux bearing image information onto a photosensitive member and having a one-line array of a plurality of converging light transmission media; means arranged in a light path for exposing said image for correcting an ununiformity of light intensity on said photosensitive member due to said focusing optical system; a degree M of overlapping of images defined by M=Xo/D, where D is an effective diameter of said converging light transmission medium and Xo is a radius of view field on said photosensitive member, being selected to a vicinity of 2.75, 3.25 or 3.75.
References Cited (Backward Citations)
US3788740A
Cited
CA1041341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |