Optical scanner feedback system having a reflected cylinder lens
First Claim
1. A feedback system for providing a feedback signal representative of a laser beam focused along an optical path onto a scanning surface, the feedback system comprising:
- a cylinder lens having a longitudinal axis and a transverse axis, located along the optical path having an optical surface for shaping and focusing the laser beam in a first direction; and
a photodetector having an active region sensitive to light;
wherein the laser beam includes a scanning portion which passes through the cylinder lens and a reflected portion which reflects off the cylinder lens, wherein the reflected portion is reflected such that it is incident on the photodetector active region.
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Accused Products
Abstract
An optical scanner feedback system. The feedback system provides a feedback signal representative of a laser beam focused along an optical path onto a scanning surface. The feedback system includes a cylinder lens having a longitudinal axis and a transverse axis, located along the optical path having an optical surface for shaping and focusing the laser beam in a first direction. A photodetector is provided having an active region sensitive to light. The laser beam includes a scanning portion which passes through the lens and a reflected portion which reflects off the lens. The reflected portion is reflected such that it is incident on the photodetector active region for providing an output signal representative of the laser beam.
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Citations
19 Claims
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1. A feedback system for providing a feedback signal representative of a laser beam focused along an optical path onto a scanning surface, the feedback system comprising:
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a cylinder lens having a longitudinal axis and a transverse axis, located along the optical path having an optical surface for shaping and focusing the laser beam in a first direction; and a photodetector having an active region sensitive to light; wherein the laser beam includes a scanning portion which passes through the cylinder lens and a reflected portion which reflects off the cylinder lens, wherein the reflected portion is reflected such that it is incident on the photodetector active region. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A laser feedback control system for use in a laser imaging system, the laser feedback control system comprising:
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a laser assembly for producing a laser beam representative of the image to be exposed on the photosensitive film; a cylinder lens having a longitudinal axis and a transverse axis positioned in optical alignment along an optical path as defined by the laser beam, for focusing and shaping the laser beam; and a photodetector having an active region sensitive to a laser light; wherein the laser beam includes a reflected portion which is reflected off of the cylinder lens and which does not pass through the cylinder lens, wherein the reflected portion is directed to be incident on the photodetector active region. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A laser scanning assembly for exposing an image on a scanned surface, the laser scanning assembly comprising;
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a laser assembly for producing a laser beam representative of the image to be exposed on the scanned surface, wherein the laser beam defines an optical path between the laser assembly and the scanned surface; a first lens system positioned in optical alignment along the optical path including a cylinder lens positioned in optical alignment along the optical path for focusing and shaping the laser beam in a first direction; a second lens system for focusing and shaping the laser beam in a second direction; a laser beam scanning and directing system located along the optical path; and a photodetection mechanism; wherein the laser beam includes a reflected portion which is reflected off of the cylinder lens, wherein the reflected portion is directed to be incident on the photodetection mechanism, and wherein the photodetection mechanism is responsive to the reflected portion for providing an output signal representative of the laser beam.
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Specification