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Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
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An improved scanning system is described which includes two lenses are added to compensate for irregularities in the surface to be scanned.
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
73% of the total text.
Page 1 of 2
Optical Scheme for Improved Scanning of Toned Photoconductor
An improved scanning system is described which includes two lenses are
added to compensate for irregularities in the surface to be scanned.
The scanning system comprises a rotating mirror 10 positioned so that an
input laser beam 12, incident upon the rotating mirror, is scanned across the
surface of photoconductor 14. Each facet of mirror 10 produces one scan across
photoconductor 14. An electrostatic image may be produced on the surface of
the photoconductor by modulating a laser beam or by other means known in the
art, and this electrostatic image may be toned by known means to produce a
visible image 16.
The reflected light from the scanned laser beam striking the photoconductor
surface is collected by a first lens 18 and directed through a second lens 20 to a
line detector 22. The electrical output from detector 22 represents an electrical
encoding of the image 16 and, as such, can be transmitted to a utilization device
24 at a remote location for use.
Should there be irregularities in the surface of photoconductor 14, such as
bumps, dents or ripples, the reflected light may be diverted so that it does not
reach detector 22. The first lens 18 is a cylindrical Fresnel lens that redirects the
specularly reflected light from the photoconductor to a point on detector 22, as
shown in the two figures below in which the normal path is shown in full line and
the deviated path is shown in dashed line. Any h...