US4921320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical scanner
Assignee: Eastman Kodak Co
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Filing: 1988-09-22
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Granted: 1990-05-01
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Expires: 2008-09-22
Abstract
Abstract An optical scanner is disclosed for scanning a light beam onto a receiving medium. The scanner includes a rotatable polygon for receiving a light beam from a source and for scanning the beam through a predetermined angle, and optical elements between the polygon and receiving medium for directing the beam to the receiving medium. In order to provide a very high resolution scanner which can be used to generate half-tone images, the optical elements include a first lens element having two spherical surfaces, a second lens element which has orthogonal cylindrical surfaces, and a cylindrical mirror.
Inventors
- 👤 Donald DeJager
- 👤 David Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:16
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G02B26/12; G02B26/125; G02B26/126
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
An optical scanner for scanning a light beam generated by a light source onto a receiving medium, said scanner comprising: deflector means for scanning said beam through a predetermined angle; and optical means interposed between said deflector means and said receiving medium, said optical means comprising a first lens element having two spherical surfaces, a second lens element having two cylindrical surfaces which are oriented perpendicular to each other, and a cylindrical mirror disposed along an optical axis.
Claim 2
Dependent Claim
78 words
An optical scanner for scanning a light beam generated by a light source onto a receiving medium, said scanner comprising: deflector means for scanning said beam through a predetermined angle; and optical means interposed between said deflector means and said receiving medium, said optical means comprising a first lens element having two spherical surfaces, a second lens element having two cylindrical surfaces which are oriented perpendicular to each other, and a cylindrical mirror disposed along an optical axis.
Claim 3
Dependent Claim
21 words
An optical scanner, as defined in claim 1, wherein said deflector means comprises a polygon rotatable about an axis of rotation.
Claim 4
Dependent Claim
22 words
An optical scanner, as defined in claim 1, wherein an input beam to said deflector means is converging in the scan direction.
Claim 5
Dependent Claim
23 words
An optical scanner, as defined in claim 1, wherein a plano mirror is interposed between said second lens element and said cylindrical mirror.
Claim 6
Dependent Claim
29 words
An optical scanner, as defined in claim 1, wherein said beam has a spot size at the receiving medium of a size which is suitable for producing half-tone images.
Claim 7
Dependent Claim
42 words
An optical scanner, as defined in claim 1, wherein said deflector means is located relative to said optical axis such that a greater portion of said angle is located on one side of said optical axis than on an opposite side thereof.
Claim 8
Dependent Claim
14 words
An optical scanner, as defined in claim 6 wherein said angle is about 54°.
Claim 9
Dependent Claim
34 words
An optical scanner, as defined in claim 7, wherein said deflector is scanned through an angle of about 31° on said one side of said optical axis and about 23° on said opposite side.
References Cited (Backward Citations)
US3505658A
Cited
US3946150A
Cited
US4274703A
Cited
US4277128A
Cited
US4247160A
Cited
US4379612A
Cited
US4512625A
Cited
US4818046A
Cited
US4796962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |