US5331468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intensity redistribution for exposure correction in an overfilled symmetrical laser printer
Assignee: Eastman Kodak Co
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Filing: 1992-11-27
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Granted: 1994-07-19
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Expires: 2012-11-27
Abstract
Abstract A method for redistributing intensity of a Gaussian beam of light having a Gaussian shaped intensity profile comprises the steps of exposing a photosensitive material to a scanning beam of a laser printing apparatus, writing a desired pattern onto the photosensitive material with the laser printing apparatus, and interposing the exposed photosensitive material in the Gaussian beam and flattening the Gaussian shaped intensity profile of the Gaussian beam. A beam shaper has a laser source for producing a beam of light, a collimating lens for receiving the beam of light from the laser source and producing a collimated beam of light, an apodizer for receiving the collimated beam of light and flattening a Gaussian intensity of the collimated beam in one dimension only, and shaping optics for receiving the beam from the apodizer and producing a beam that is large in a line scan direction.
Inventors
- 👤 Mark L. Noethen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:50
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/09; G02B27/0927; B; B41; B41J; B41J2/00; B41J2/435; B41J2/47; B41J2/471; G02B26/00; G02B26/08; G02B26/10; G02B26/12; G02B26/124; G02B5/00; G02B5/20; G02B5/205; H; H04; H04N; H04N1/00; H04N1/04; H04N1/113; H04N1/1135
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
A beam shaper, comprising: a laser source for producing a beam of light; a collimating lens for receiving said beam of light from said laser source and producing a collimated beam of light; an apodizer for receiving said collimated beam of light and flattening a Gaussian intensity of said collimated beam in one dimension only; and shaping optics for receiving said beam from said apodizer and producing a beam that is large in a line scan direction.
Claim 2
Dependent Claim
77 words
A beam shaper, comprising: a laser source for producing a beam of light; a collimating lens for receiving said beam of light from said laser source and producing a collimated beam of light; an apodizer for receiving said collimated beam of light and flattening a Gaussian intensity of said collimated beam in one dimension only; and shaping optics for receiving said beam from said apodizer and producing a beam that is large in a line scan direction.
Claim 3
Dependent Claim
29 words
A beam shaper, as set forth in claim 1, wherein said apodizer comprises a photosensitive material having an inverse Gaussian pattern digitally written thereon with a laser writing apparatus.
Claim 4
Independent Claim
78 words
A method for redistributing in one dimension only the intensity of a beam of light having a Gaussian shaped intensity profile, comprising the steps of: exposing a photosensitive material to a scanning beam of a laser printing apparatus; digitally writing a desired pattern onto the photosensitive material with the laser printing apparatus; developing the exposed photosensitive material; and interposing the exposed photosensitive material in the Gaussian beam and flattening the Gaussian shaped intensity profile of the Gaussian beam.
Claim 5
Independent Claim
78 words
A method for redistributing in one dimension only the intensity of a beam of light having a Gaussian shaped intensity profile, comprising the steps of: exposing a photosensitive material to a scanning beam of a laser printing apparatus; digitally writing a desired pattern onto the photosensitive material with the laser printing apparatus; developing the exposed photosensitive material; and interposing the exposed photosensitive material in the Gaussian beam and flattening the Gaussian shaped intensity profile of the Gaussian beam.
Claim 6
Dependent Claim
26 words
A method, as set forth in claim 3, including the step of writing an inverse Gaussian pattern onto the photosensitive material with the laser printing apparatus.
Claim 7
Independent Claim
65 words
A method for operating a laser scanning device having an optical axis and having a polygon mirror with a plurality of facets, comprising the steps of: directing a beam of light having a Gaussian shaped intensity profile towards said polygon mirror; and interposing an apodizer in said beam of light before said polygon mirror and flattening said Gaussian shaped intensity profile in one dimension only.
Claim 8
Independent Claim
65 words
A method for operating a laser scanning device having an optical axis and having a polygon mirror with a plurality of facets, comprising the steps of: directing a beam of light having a Gaussian shaped intensity profile towards said polygon mirror; and interposing an apodizer in said beam of light before said polygon mirror and flattening said Gaussian shaped intensity profile in one dimension only.
Claim 9
Dependent Claim
50 words
A method, as set forth in claim 5, including the steps of: filling at least one of said facets with said beam; overflowing said beam onto an adjacent facet; and reflecting said beam from said rotating polygon mirror so that the reflected beam is symmetrically positioned about said optical axis.
Claim 10
Independent Claim
47 words
A method for creating a one dimensional apodizer, comprising the steps of: exposing a photosensitive material to a scanning beam of a laser printing apparatus and digitally writing an inverse Gaussian pattern onto the photosensitive material with the laser printing apparatus; and developing the exposed photosensitive material.
Claim 11
Independent Claim
47 words
A method for creating a one dimensional apodizer, comprising the steps of: exposing a photosensitive material to a scanning beam of a laser printing apparatus and digitally writing an inverse Gaussian pattern onto the photosensitive material with the laser printing apparatus; and developing the exposed photosensitive material.
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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) | 1997-07-18 | 1998-01-17 | 1998-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-18 | 2002-01-17 | 2002-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-18 | 2006-01-17 | 2006-07-19 | $7700.00 | Window Closed / Lapsed |