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US 5,627,579 AGranted
Raster scanning optical system and method for adjusting scan line locations on a photoreceptor
AssigneeXerox Corporation
InventorTibor Fisli
Life of this patent
Estimating the term…
Abstract
A raster scanning optical system and method for adjusting a scan line location on a light receiving member by a desired amount. A photoreceptor receives a light beam as the photoreceptor is advancing in a slow scan direction. A polygon mirror scans the light beam across the photoreceptor at a scan line location extending in a fast scan direction. A light transmissive plate is located in the path of the light beam between the polygon mirror and the photoreceptor. The light transmissive plate is adjusted by an adjusting device to displace the scan line location on the photoreceptor by the desired amount in a direction parallel to the slow scan direction.
Claims57
A raster scanning optical system comprising:
- a light receiving member that receives a light beam, the light receiving member advancing in a process direction;
- a scanning device that scans the light beam across the light receiving member at a scan line location in a direction perpendicular to the process direction;
- a light transmissive plate located in a path of the light beam between the scanning device and the light receiving member;
- and
- an adjusting device, contacting the light transmissive plate, for controllably adjusting a position of the light transmissive plate to displace the scan line location on the light receiving member, the light transmissive plate being adjustably controlled by the adjusting device to displace the scan line location on the light receiving member by a desired amount in a direction parallel to the process direction.
2 more elements
A raster scanning optical system comprising:
- a light receiving member for receiving a light beam, the light receiving member advancing in a process direction;
- a scanning device for scanning the light beam across the light receiving member to form a scan line along a direction perpendicular to the process direction;
- a light transmissive device located in a path of the light beam between the scanning device and the light receiving member;
- and
- an adjusting device contacting the light transmissive plate, the adjusting device adjusting an angular position of the light transmissive plate to displace the location of the scan line on the light receiving member by a desired amount in a direction parallel to the process direction.
2 more elements
A printer comprising:
- an image receiving device for receiving a plurality of light beams, the image receiving device advancing in a process direction;
- a scanning device that scans the plurality of light beams across the image receiving device in a direction perpendicular to the process direction to form a plurality of scan lines;
- a plurality of light transmissive plates, each light transmissive plate located in a path of one of the plurality of light beams between the scanning device and the image receiving device, the plurality of light transmissive plates controllably displacing a location of each scan line on the image receiving device by a desired amount in a direction parallel to the process direction;
- and
- an adjusting device to controllably adjust the plurality of light transmissive plates.
2 more elements
A printer comprising:
- an image receiving device for receiving a plurality of light beams;
- a scanning device that scans the plurality of light beams across the image receiving device to form a plurality of scan lines extending in a first direction;
- a plurality of light transmissive plates, each light transmissive plate located in a path of one of the plurality of light beams between the scanning device and the image receiving device;
- and
- a plurality of adjusting devices each being connected to one of the light transmissive plates, the plurality of adjusting devices adjusting an angular position of each light transmissive plate to displace a location of each of the scan lines on the image receiving device by a desired amount in a direction perpendicular to the first direction.
2 more elements
A raster scanning optical system comprising:
- a light receiving member for receiving a light beam;
- a scanning device for scanning the light beam across the light receiving member to form a scan line extending along a fast scan direction;
- and
- a light transmissive plate located in a path of the light beam between the scanning device and the light receiving member, the light transmissive plate controllably displacing a location of the scan line on the light receiving member by a desired amount in a direction parallel to a slow scan direction using an adjusting device, the slow scan direction being perpendicular to the fast scan direction.
1 more element
A multi-station printer comprising:
- a first photoreceptor that receives a first light beam, the first photoreceptor rotating in a first direction;
- a second photoreceptor that receives a second light beam, the second photoreceptor rotating in a second direction;
- a third photoreceptor that receives a third light beam, the third photoreceptor rotating in a third direction;
- a fourth photoreceptor that receives a fourth light beam, the fourth photoreceptor rotating in a fourth direction;
- a scanning device for scanning the first light beam across the first photoreceptor to form a first scan line in a direction perpendicular to the first direction, for scanning the second light beam across the second photoreceptor to form a second scan line in a direction perpendicular to the second direction, for scanning the third light beam across the third photoreceptor to form a third scan line in a direction perpendicular to the third direction, and for scanning the fourth light beam across the fourth photoreceptor to form a fourth scan line in a direction perpendicular to the fourth direction;
- a first light transmissive plate located in a path of the first light beam between the scanning device and the first photoreceptor, the first light transmissive plate displacing a location of the first scan line on the first photoreceptor by a first desired amount in a direction parallel to the first direction;
- a second light transmissive plate located in a path of the second light beam between the scanning device and the second photoreceptor, the second light transmissive plate displacing a location of the second scan line on the second photoreceptor by a second desired amount in a direction parallel to the second direction;
- a third light transmissive plate located in a path of the third light beam between the scanning device and the third photoreceptor, the third light transmissive plate displacing a location of the third scan line on the third photoreceptor by a third desired amount in a direction parallel to the third direction;
- a fourth light transmissive plate located in a path of the fourth light beam between the scanning device and the fourth photoreceptor, the fourth light transmissive plate displacing a location of the fourth scan line on the fourth photoreceptor by a fourth desired amount in a direction parallel to the fourth direction;
- and
- an adjusting device to adjust at least the first light transmissive plate so as to displace the location of the first scan line by the first desired amount.
8 more elements
A multi-station printer comprising:
- a first light receiving member advancing in a first process direction;
- a second light receiving member advancing in a second process direction;
- a scanning device for scanning a first light beam across the first light receiving member in a direction perpendicular to the first process direction, for scanning a second light beam across the second light receiving member in a direction perpendicular to the second process direction;
- a first adjustable light transmissive plate located in a path of the first light beam between the scanning device and the first light receiving member, the first adjustable light transmissive plate displacing a location of a scan line corresponding to the first light beam on the first light receiving member by a desired amount in a direction parallel to the first process direction;
- a second adjustable light transmissive plate, located in a path of the second light beam between the scanning device and the second light receiving member, the second adjustable light transmissive plate displacing a location of a scan line corresponding to the second light beam on the second light receiving member by a desired amount in a direction parallel to the second process direction;
- and
- a first adjusting device to adjust at least the first adjustable light transmissive plate so as to displace the location of the scan line by the desired amount.
4 more elements
A raster scanning method for adjusting a location of a scan line on a light receiving member, the method comprising the steps of:
- scanning a light beam from a scanning device across the light receiving member to form a scan line extending in a fast scan direction, the light beam passing through a light transmissive plate located in a path of the light beam between the scanning device and the light receiving member;
- controllably adjusting a position of the light transmissive plate using an adjusting device after scanning the light beam across the light receiving member;
- and
- scanning a new light beam across the light receiving member in the fast scan direction, the new light beam passing through the adjusted light transmissive plate, the adjusted light transmissive plate displacing a location of the scan line on the light receiving member by a desired amount in a direction perpendicular to the fast scan direction.
1 more element
A method for registering scan lines in a raster scanning optical system, the raster scanning optical system comprising a scanning device and a plurality of light receiving members, the method comprising the steps of:
- scanning a first light beam across a first light receiving member to form a first scan line extending in a first direction;
- scanning a second light beam across a second light receiving member to form a second scan line extending in a second direction, the second light beam passing through a first light transmissive plate located in a path of the second light beam between the scanning device and the second light receiving member;
- controllably adjusting a position of the first light transmissive plate using an adjusting device after scanning the second light beam across the second light receiving member;
- and
- rescanning the second light beam across the second light receiving member to form the second scan line, the rescanned second light beam passing through the adjusted first light transmissive plate to displace a location of the second scan line by a desired amount in a direction perpendicular to the second direction, the displaced location of the second scan line being in proper registration with the first scan line.
2 more elements
A method for registering scan lines in a raster scanning system, the system comprising a light receiving device for receiving a plurality of light beams and a scanning device that scans the plurality of light beams across the light receiving device to form a plurality of scan lines extending in a fast scan direction, the method comprising the steps of:
- controllably adjusting a position of a first light transmissive plate located in a path of a first light beam between the scanning device and the light receiving device using an adjusting device, the adjusted position of the first light transmissive plate displacing a location of a first scan line on the light receiving device by a first desired amount in a direction perpendicular to the fast scan direction;
- and
- adjusting a position of a second light transmissive plate located in a path of a second light beam between the scanning device and the light receiving device, the adjusted position of the second light transmissive plate displacing a location of a second scan line on the light receiving device by a second desired amount in the direction perpendicular to the fast scan direction, the displaced location of the second scan line being in proper registration with the location of the first scan line.
A raster scanning method comprising the steps of:
- forming an initial scan line on a photoreceptor by scanning a light beam from a scanning device to the photoreceptor, the light beam passing through a light transmissive plate located in a path of the light beam between the scanning device and the photoreceptor, the initial scan line extending along a first direction of the photoreceptor;
- controllably adjusting a displacement angle of the light transmissive plate using an adjusting device after forming the initial scan line;
- and
- scanning a subsequent scan line across the photoreceptor by passing a subsequent light beam through the light transmissive plate with the adjusted displacement angle, the subsequent scan line being displaced from the initial scan line in a direction perpendicular to the first direction, an amount of displacement of the second scan line being based on the adjusted displacement angle.
1 more element
Dependencies are inferred from the claim text.