US5521999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for a laser printer
Assignee: Eastman Kodak Co
•
Filing: 1994-03-17
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Granted: 1996-05-28
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Expires: 2014-03-17
Abstract
Abstract An optical system for a laser printer. The optical system includes a diode laser for producing a laser beam at a predetermined wavelength for scanning across a photosensitive media. A single mode fiber is connected to the diode laser for transmitting the beam from the diode laser to an object plane.
Inventors
- 👤 Chih-Li Chuang
- 👤 Andrew F. Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:31
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4204; G02B6/4206; B; B41; B41J; B41J2/00; B41J2/435; B41J2/47; B41J2/471
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
95 words
An optical system for a laser printer, comprising: a) a laser diode for producing a laser beam at a predetermined wavelength for scanning across a photosensitive media: b) a single mode fiber connected to said laser diode for transmitting said beam from said laser diode to an object plane, and further comprising c) a coupler for coupling said laser diode to said single mode fiber, wherein said coupler comprises a VPS lens which controls the high divergence direction of the beam such that the beam has an ellipticity ratio equal to or less than 2.0.
Claim 2
Dependent Claim
95 words
An optical system for a laser printer, comprising: a) a laser diode for producing a laser beam at a predetermined wavelength for scanning across a photosensitive media: b) a single mode fiber connected to said laser diode for transmitting said beam from said laser diode to an object plane, and further comprising c) a coupler for coupling said laser diode to said single mode fiber, wherein said coupler comprises a VPS lens which controls the high divergence direction of the beam such that the beam has an ellipticity ratio equal to or less than 2.0.
Claim 3
Dependent Claim
41 words
An optical system for a laser printer according to claim 1 wherein said coupler comprises a VPS lens which controls the high divergence direction of the beam such that the beam has an ellipticity ratio equal to or less than 1.25.
Claim 4
Dependent Claim
34 words
An optical system for a laser printer according to claim 2 wherein said lens controls the high divergence direction of the beam such that the beam has an ellipticity ratio substantially equal to 1.0.
Claim 5
Dependent Claim
85 words
An optical system for a laser printer, comprising: a) a laser diode for producing a laser beam at a predetermined wavelength for scanning across a photosensitive media; b) a single mode fiber connected to said laser diode for transmitting said beam from said laser diode to an object plane, and further comprising c) a coupler for coupling said laser diode to said single mode fiber, wherein said coupler comprises a VPS lens which provides an astigmatism equal to or less than 0.1λ of the diode.
Claim 6
Dependent Claim
85 words
An optical system for a laser printer, comprising: a) a laser diode for producing a laser beam at a predetermined wavelength for scanning across a photosensitive media; b) a single mode fiber connected to said laser diode for transmitting said beam from said laser diode to an object plane, and further comprising c) a coupler for coupling said laser diode to said single mode fiber, wherein said coupler comprises a VPS lens which provides an astigmatism equal to or less than 0.1λ of the diode.
Claim 7
Dependent Claim
86 words
An optical system for a laser printer, comprising: a) a laser diode for producing a laser beam at a predetermined wavelength for scanning across a photosensitive media; b) a single mode fiber connected to said laser diode for transmitting said beam from said laser diode to an object plane, and further comprising c) a coupler for coupling said laser diode to said single mode fiber, wherein said coupler comprises a VPS lens which provides an astigmatism with a Strehl ratio equal to or greater than 0.8.
Claim 8
Dependent Claim
86 words
An optical system for a laser printer, comprising: a) a laser diode for producing a laser beam at a predetermined wavelength for scanning across a photosensitive media; b) a single mode fiber connected to said laser diode for transmitting said beam from said laser diode to an object plane, and further comprising c) a coupler for coupling said laser diode to said single mode fiber, wherein said coupler comprises a VPS lens which provides an astigmatism with a Strehl ratio equal to or greater than 0.8.
Claim 9
Dependent Claim
34 words
An optical system for a laser printer according to claim 5 wherein said lens controls the high divergence direction of the beam such that the beam has an ellipticity ratio substantially equal to 1.0.
Claim 10
Dependent Claim
56 words
A coupler for coupling a laser diode of a predetermined wavelength to a single mode optical fiber, comprising a VPS lens which controls the high divergence direction of the beam so as to be substantially equal to the low divergence direction of the beam, the beam having an ellipticity ratio equal to or less than 2.0.
Claim 11
Dependent Claim
56 words
A coupler for coupling a laser diode of a predetermined wavelength to a single mode optical fiber, comprising a VPS lens which controls the high divergence direction of the beam so as to be substantially equal to the low divergence direction of the beam, the beam having an ellipticity ratio equal to or less than 2.0.
Claim 12
Dependent Claim
32 words
A coupler according to claim 7 wherein said VPS lens controls the high divergence direction of the beam such that the beam has an ellipticity ratio equal to or less than 1.25.
Claim 13
Dependent Claim
23 words
A coupler according to claim 7 wherein said VPS lens provides an astigmatism equal to or less than 0.1λ of the laser diode.
Claim 14
Dependent Claim
30 words
A coupler according to claim 7 wherein said VPS lens controls the high divergence direction of the beam such that the beam has an ellipticity ratio substantially equal to 1.
Claim 15
Dependent Claim
23 words
A coupler according to claim 7 wherein said VPS lens provides an astigmatism with a Strehl ratio equal to or greater than 0.8.
Claim 16
Dependent Claim
44 words
A coupler according to claim 7 wherein VPS lens provides an astigmatism with a Strehl ratio equal to or greater than 0.8 and which controls the high divergence direction of the beam such that the beam has an ellipticity ratio substantially equal to 1.0.
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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) | 1999-05-28 | 1999-11-27 | 2000-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-28 | 2003-11-27 | 2004-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-28 | 2007-11-27 | 2008-05-28 | $7700.00 | Window Closed / Lapsed |