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公开(公告)号：DK154248C
公开(公告)日：1989-03-28
申请号：DK425381
申请日：1981-09-25
Applicant: XEROX CORP
Inventor： LAVALLEE PIERRE A , MARSHALL SIDNEY W , ANTOS RONALD L
Abstract: A raster scanner (10) with laser (22) for generating a scanning beam (32) and compact, folded optical system (24, 30, 33, 36, 47) for transmitting the beam to an object (12) to be scanned. The optical system includes a first mirror (24) for guiding the laser beam to a modulator (27), a second mirror (30) beyond the modulator for intercepting the beam from the modulator and guiding it to a mirror (33) which guides the beam to the mirrored facets of a rotary polygon (35), the polygon scanning the beam through a preset scan arc and returning the beam via a focusing lens (45) to the third mirror, the third mirror reflecting the beam onto a fourth mirror (47) guiding the beam to the object (12).
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公开(公告)号：DE3163963D1
公开(公告)日：1984-07-12
申请号：DE3163963
申请日：1981-06-02
Applicant: XEROX CORP
Inventor： LAVALLEE PIERRE A , STOFFEL JAMES C
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公开(公告)号：CA962761A
公开(公告)日：1975-02-11
申请号：CA147830
申请日：1972-07-25
Applicant: XEROX CORP
Inventor： LAVALLEE PIERRE A
Abstract: Data compression methods and the apparatus therefor are provided in accordance with the teachings of the present invention. According to one embodiment of this invention data signals are progressively combined to form successively decreasing numbers of groups of combined signals until a single group of signals is obtained. Those groups of combined signals containing non-redundant information are selectively transmitted. The selectively transmitted groups of combined signals are received and decoded whereby original data signals are regenerated. The data signals may comprise a multibit digital word or may represent video information. Encoding of the data signals removes redundant portions therefrom.
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公开(公告)号：DE2819265A1
公开(公告)日：1978-11-16
申请号：DE2819265
申请日：1978-05-02
Applicant: XEROX CORP
Inventor： CREAN PETER A , LAVALLEE PIERRE A , AGULNEK MARTIN
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公开(公告)号：DE2819266A1
公开(公告)日：1978-11-09
申请号：DE2819266
申请日：1978-05-02
Applicant: XEROX CORP
Inventor： CREAN PETER A , LAVALLEE PIERRE A , AGULNEK MARTIN A
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Patent Agency Ranking
公开(公告)号：DK154248B
公开(公告)日：1988-10-24
申请号：DK425381
申请日：1981-09-25
Applicant: XEROX CORP
Inventor： LAVALLEE PIERRE A , MARSHALL SIDNEY W , ANTOS RONALD L
Abstract: A raster scanner (10) with laser (22) for generating a scanning beam (32) and compact, folded optical system (24, 30, 33, 36, 47) for transmitting the beam to an object (12) to be scanned. The optical system includes a first mirror (24) for guiding the laser beam to a modulator (27), a second mirror (30) beyond the modulator for intercepting the beam from the modulator and guiding it to a mirror (33) which guides the beam to the mirrored facets of a rotary polygon (35), the polygon scanning the beam through a preset scan arc and returning the beam via a focusing lens (45) to the third mirror, the third mirror reflecting the beam onto a fourth mirror (47) guiding the beam to the object (12).
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公开(公告)号：DE3174447D1
公开(公告)日：1986-05-28
申请号：DE3174447
申请日：1981-02-18
Applicant: XEROX CORP
Inventor： LAVALLEE PIERRE A
Abstract: A multiple mode image processing apparatus and method. The apparatus, in a copy mode, processes copies xerographically. In a write mode, images derived from image signals are written on the apparatus photoreceptor by a raster scanner, and in a read mode, the raster scanner scans images developed on the photoreceptor to produce image signals representative thereof. A multiple speed drive is provided for the photoreceptor to move the photoreceptor at a high speed when processing copies xerographically and at a lower speed compatible with the data transmission rate for image signals when writing or reading images.
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公开(公告)号：CA1162430A
公开(公告)日：1984-02-21
申请号：CA384295
申请日：1981-08-20
Applicant: XEROX CORP
Inventor： LAVALLEE PIERRE A , MARSHALL SIDNEY W , ANTOS RONALD L
Abstract: A raster scanner with laser for generating a scanning beam and compact, folded optical system for transmitting the beam to the object to be scanned. The optical system includes a first mirror for guiding the laser beam forward along a downwardly inclined slope to the modulator, a second mirror below the modulator for intercepting the beam from the modulator and folding the intercepted beam to guide the beam backwards along a horizontal plane to a third mirror which folds the beam and guides the beam forward along an upwardly inclined slope against the mirrored facets of a rotating polygon, the polygon scanning the beam through a preset scan arc and returning the beam via a focusing lens to the third mirror, the third mirror folding the scan beam and guiding the scan beam forward, and a fourth mirror for intercepting the scan beam and guiding the beam to the object to be scanned.
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公开(公告)号：CA1146261A
公开(公告)日：1983-05-10
申请号：CA394701
申请日：1982-01-21
Applicant: XEROX CORP
Inventor： CREAN PETER A , LAVALLEE PIERRE A , AGULNEK MARTIN A
IPC: H04N1/04
Abstract: SCANNING APPARATUS A line scanning apparatus employing a multiplicity of linear arrays, the linear extent of which is less than the length of the scan line. To permit an entire line to be covered, the arrays are offset from one another in the direction of scan with adjoining array ends overlapped. To correct for the misalignment and redundancy introduced, the image data from the arrays is buffered until a line is completed when readout, is initiated. during readout, cross over from one array to the next is effected within the overlapped areas and the redundant data discarded.
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公开(公告)号：CA1119238A
公开(公告)日：1982-03-02
申请号：CA301829
申请日：1978-04-24
Applicant: XEROX CORP
Inventor： CREAN PETER A , LAVALLEE PIERRE A
Abstract: A line scanning apparatus employing a multiplicity of linear arrays, the linear extent of which is less than the length of the scan line. To permit an entire line to be covered, the arrays are offset from one another in the direction of scan with adjoining array ends overlapped. To correct for the misalignment and redundancy introduced, the image data from the arrays is buffered until a line is completed when readout, is initiated. During readout, cross over from one array to the next is effected within the overlapped areas and the redundant data discarded.
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