Minimization of differential bow in multiple beam scanning optical systems
Patent 5517330 Issued on May 14, 1996. Estimated Expiration Date: 
October 25, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 25, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesSynchronizing signal generator Scanner with reflective pyramid error compensation Optical scanning system Scanner optics with no cross scan field curvature Polycone™ scanning system with multiple beams Apparatus and method for velocity compensation of the scanning spot in non-linear scanning systems Patent #: 5333067 InventorAssigneeApplicationNo. 329011 filed on 10/25/1994US Classes:358/481, Including a polygon reflector348/203, Moving reflector358/480, Coherent light359/196, DEFLECTION USING A MOVING ELEMENT OR MEDIUM (OFFSETTING OR CHANGING AT LEAST A PORTION OF THE BEAM)359/197, Using a periodically moving element (periodic change of optically reflecting, refracting or diffracting element)359/204, Utilizing plural light beams359/208Concave reflectorExaminersPrimary: Coles, Sr., Edward L.Assistant: Esposo, Allan A. Attorney, Agent or FirmInternational ClassesH04N 001/04G02B 026/08 AbstractA raster scanning system is disclosed which utilizes a post polygon optics which generates a field curvature to substantially reduce a differential bow. The post polygon optics of this invention comprises a first lens, a second lens and a wobble correction mirror. The second lens and the wobble correction mirror generate a field curvature to reduce the differential bow and the combination of the first lens, second lens and the wobble mirror correction minimizes the generated field curvature.Field of SearchCoherent lightIncluding a polygon reflector Having five or fewer facets Having moving lens Having multifaceted rotating element With facets parallel to rotation axis DEFLECTION USING A MOVING ELEMENT OR MEDIUM (OFFSETTING OR CHANGING AT LEAST A PORTION OF THE BEAM) Having six, seven, or eight facets High distortion lens (e.g., fO lens, etc.) Anamorphic element Concave reflector Using a periodically moving element (periodic change of optically reflecting, refracting or diffracting element) Utilizing plural light beams Means for moving optical system Repetitious path Rotary motion Plural light sources or optical paths Moving reflector | |
