Invention Grant
US06429957B1 Double-pass sagittally offset pre-polygon optics for raster output scanners
有权
用于光栅输出扫描仪的双通径向偏移预多边形光学元件
- Patent Title: Double-pass sagittally offset pre-polygon optics for raster output scanners
- Patent Title (中): 用于光栅输出扫描仪的双通径向偏移预多边形光学元件
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Application No.: US09534530Application Date: 2000-03-27
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Publication No.: US06429957B1Publication Date: 2002-08-06
- Inventor: Susan E. Dunn , James J. Appel , John A. Durbin
- Applicant: Susan E. Dunn , James J. Appel , John A. Durbin
- Main IPC: G02B2608
- IPC: G02B2608

Abstract:
Pre-polygon optics are provided which consist of a compact design such that the number of pre-polygon elements in the pre-polygon optics is reduced while achieving desired light beam characteristic. The pre-polygon optics may consist of a hybrid toroidal diffractive optical element, refractive cross-cylindrical optical elements, refractive spherical and cylindrical optical elements, a refractive sagittal cylindrical optical element or a refractive tangential cylindrical optical element. Accordingly, advantages such as lower cost and ease of alignment are achieved.
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