Scanning optical apparatus and image forming apparatus using the same
October 8, 2023. 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 ReferencesScanning optical system having a fall-down correcting function Optical scanning system with diffractive optics Scanning optical system Optical scanning device and a scanning lens therefor Color image forming apparatus Scanning optical apparatus Scanning optical system Scanning optical system Scanning optical device ROS bow compensation InventorAssigneeApplicationNo. 10680147 filed on 10/08/2003US Classes:347/244, Specific lens359/218, Having six, seven, or eight facets359/205, Having particular focusing element to receive scanned light359/207, Anamorphic element347/137, Lens358/1.1STATIC PRESENTATION PROCESSING (E.G., PROCESSING DATA FOR PRINTER, ETC.)ExaminersPrimary: Pham, ChiAttorney, Agent or FirmForeign Patent References
International ClassB41J027/00AbstractA scanning optical apparatus includes incident optical system for causing at least one light beam emitted from a light source to be incident on a deflection device and image formation optical system including at least one refractive optical element and at least one diffraction optical element for imaging said at least one light beam reflected and deflected by the deflection device on a surface to be scanned. The diffraction optical element has at least one of an incident surface having a convex shape in a sub-scanning cross-section facing the deflection device and an exit surface having a convex shape in the sub-scanning cross-section facing the surface to be scanned. | |
