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Apparatus for scanning a laser beam including means for focusing a scale scanning beam and a read/write scanning beam on the same facet of a polygon scanning mirror
Apparatus for scanning a laser beam including means for focusing a scale scanning beam and a read/write scanning beam on the same facet of a polygon scanning mirror
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机译:用于扫描激光束的设备,包括用于将刻度扫描束和读取/写入扫描束聚焦在多面扫描镜的同一面上的装置
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摘要
Apparatus for scanning a laser beam including a beam splitter for splitting a laser beam into a scale scanning beam and a read/write scanning beam, a modulator for applying information to the read/write scanning beam, lenses and mirrors, including a cylindrical lens for directing both beams onto the same facet of a rotating polygonal scanning mirror, and a lens for focusing the modulated beam to a spot on a scanned medium and for focusing the unmodulated beam through a scale onto a detector for providing timing pulses for the apparatus.
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