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    • 8. 发明授权
    • Light-beam scanning apparatus having two beam waists
    • 具有两个束腰的光束扫描装置
    • US4775205A
    • 1988-10-04
    • US27109
    • 1987-03-13
    • Toshio Muramatsu
    • Toshio Muramatsu
    • G02B26/12G03F1/00G03F1/54H04N1/113G02B26/10
    • G02B26/12
    • A light beam scanning apparatus including a light source for emitting a light beam and a rotatable polygon mirror having at least one surface for reflecting the light beam to a second surface being scanned. A flat field lens is provided between the polygon mirror and the second surface and an optical system is provided close to the second surface. The optical system has a light converging effect only in the vertical direction perpendicular to the scanning direction, and the light beam forms a first beam waist between the flat field lens and the optical system, and a second beam waist substantially on the second surface.
    • 一种光束扫描装置,包括用于发射光束的光源和具有用于将光束反射到被扫描的第二表面的至少一个表面的可旋转多面镜。 在多面镜和第二表面之间提供平坦的场透镜,并且靠近第二表面设置光学系统。 光学系统仅在垂直于扫描方向的垂直方向上具有聚光效果,并且光束在平坦场透镜和光学系统之间形成第一光束腰部,并且基本上在第二表面上形成第二光束腰部。