US5257048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical element and photoreceptor registration system for a raster output scanner in an electrophotographic printer
Assignee: Xerox Corp
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Filing: 1993-02-16
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Granted: 1993-10-26
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Expires: 2013-02-16
Abstract
Abstract A system, including a specially-designed optical element, facilitates extremely precise and accurate registration of a light beam on a photoreceptor. The optical element includes a redirecting cylinder lens, having a longitudinal axis oriented obliquely relative to the scan path of the light beam to redirect the light beam. The redirected light beam interacts with an aperture in the photoreceptor to provide an accurate measuring device for the exact position of the aperture with each scan.
Inventors
- 👤 Frank C. Genovese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:50
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/047; H04N1/113; H04N1/1135; H04N1/12; H04N2201/00; H04N2201/04; H04N2201/047; H04N2201/04701; H04N2201/0471; H04N2201/04732; H04N2201/04744; H04N2201/04753; H04N2201/04755; H04N2201/04758; H04N2201/0476
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
46 words
An optical element, comprising a main cylinder lens having a longitudinal axis, and a redirecting cylinder lens disposed adjacent one end of the main cylinder lens, the redirecting cylinder lens having a longitudinal axis oriented obliquely relative to the longitudinal axis of the main cylinder lens.
Claim 2
Dependent Claim
46 words
An optical element, comprising a main cylinder lens having a longitudinal axis, and a redirecting cylinder lens disposed adjacent one end of the main cylinder lens, the redirecting cylinder lens having a longitudinal axis oriented obliquely relative to the longitudinal axis of the main cylinder lens.
Claim 3
Dependent Claim
42 words
An optical element as in claim 1, wherein: the redirecting cylinder lens provides a line of focus at a first distance from the optical element; the main cylinder lens provides a line of focus at a second distance from the optical element.
Claim 4
Dependent Claim
41 words
An optical element as in claim 1, further comprising a second redirecting lens mounted in a fixed position relative to the first mentioned redirecting lens, having a second axis oriented obliquely relative to the longitudinal axis of the main cylinder lens.
Claim 5
Dependent Claim
77 words
An optical element, comprising: a main cylinder lens having a longitudinal axis, a first redirecting cylinder lens mounted adjacent one end of the main cylinder lens, the first redirecting cylinder lens having a longitudinal axis oriented obliquely relative to the longitudinal axis of the main cylinder lens, and a second redirecting lens mounted adjacent another end of the main cylinder lens, having a longitudinal axis oriented obliquely relative to the longitudinal axis of the main cylinder lens.
Claim 6
Dependent Claim
77 words
An optical element, comprising: a main cylinder lens having a longitudinal axis, a first redirecting cylinder lens mounted adjacent one end of the main cylinder lens, the first redirecting cylinder lens having a longitudinal axis oriented obliquely relative to the longitudinal axis of the main cylinder lens, and a second redirecting lens mounted adjacent another end of the main cylinder lens, having a longitudinal axis oriented obliquely relative to the longitudinal axis of the main cylinder lens.
Claim 7
Independent Claim
67 words
A system for positioning a light beam arranged in a scan path on a surface of a belt defining an aperture therein, comprising: a redirecting cylinder lens disposed where the aperture in the belt intersects with the scan path, the redirecting lens having an axis oriented obliquely relative to the scan path; and a photodetector adapted to detect light passing through the aperture and the redirecting lens.
Claim 8
Independent Claim
67 words
A system for positioning a light beam arranged in a scan path on a surface of a belt defining an aperture therein, comprising: a redirecting cylinder lens disposed where the aperture in the belt intersects with the scan path, the redirecting lens having an axis oriented obliquely relative to the scan path; and a photodetector adapted to detect light passing through the aperture and the redirecting lens.
Claim 9
Dependent Claim
47 words
A system as in claim 5 with the belt moving in a process direction, wherein the redirecting cylinder lens is adapted to redirect light in a portion of the scan path so that the portion of the scan path is oriented substantially parallel to the process direction.
Claim 10
Dependent Claim
13 words
A system as in claim 5, wherein said belt comprises a photoreceptor surface.
Claim 11
Dependent Claim
37 words
A system as in claim 7, further comprising means for creating the light beam and modulating the light beam according to image data, whereby the modulated light beam creates an electrostatic latent image on the photoreceptor surface.
Claim 12
Dependent Claim
27 words
A system as in claim 7, further comprising timing means, operatively associated with the photodetector, for monitoring the position of the aperture relative to the scan path.
Claim 13
Dependent Claim
34 words
A system as in claim 9, further comprising raster control means, operatively associated with the timing means, for controlling the placement of the electrostatic latent image on the photoreceptor surface by the creating means.
Claim 14
Dependent Claim
79 words
A scanning system comprising: means defining a surface, the surface being movable in a process direction parallel to the surface; and a redirecting cylinder lens disposed adjacent the surface, the redirecting lens having an axis oriented obliquely relative to the process direction, whereby a light beam arranged in a scan path passing through the redirecting cylinder lens and impinging on the surface is redirected so that the scan path is oriented to be substantially parallel to the process direction.
Claim 15
Dependent Claim
79 words
A scanning system comprising: means defining a surface, the surface being movable in a process direction parallel to the surface; and a redirecting cylinder lens disposed adjacent the surface, the redirecting lens having an axis oriented obliquely relative to the process direction, whereby a light beam arranged in a scan path passing through the redirecting cylinder lens and impinging on the surface is redirected so that the scan path is oriented to be substantially parallel to the process direction.
Claim 16
Dependent Claim
29 words
A system as in claim 11, further comprising: a photodetector adapted to receive at least a portion of light in the scan path passing through the redirecting cylinder lens.
Claim 17
Dependent Claim
27 words
A system as in claim 12, further comprising timing means, operatively associated with the photodetector, for monitoring the position of the surface relative to the scan path.
Claim 18
Dependent Claim
45 words
A system as in claim 13, wherein the surface comprises a photoreceptor surface, and further comprising means for creating a light beam and modulating the light beam according to image data, whereby the modulated light beam creates an electrostatic latent image on the photoreceptor surface.
Claim 19
Dependent Claim
34 words
A system as in claim 14, further comprising raster control means, operatively associated with the timing means, for controlling the placement of the electrostatic latent image on the photoreceptor surface by the creating means.
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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) | 1996-10-25 | 1997-04-26 | 1997-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-25 | 2001-04-26 | 2001-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-25 | 2005-04-26 | 2005-10-26 | $7700.00 | Window Closed / Lapsed |