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    • 1. 发明授权
    • Optical system with aberration suppression and optical head utilizing
the same
    • 光学系统具有抑制和光学头使用它们
    • US5161040A
    • 1992-11-03
    • US471955
    • 1990-01-29
    • Osamu YokoyamaShoichi Uchiyama
    • Osamu YokoyamaShoichi Uchiyama
    • G02B7/08G02B13/24G02B27/42G11B7/09G11B7/135
    • G11B7/1353G02B13/24G02B27/42G02B7/08G11B7/0908
    • An optical system, that includes a light source having sufficient coherency to provide a predominate operating wavelength and a diffraction grating lens system to focus the light from the light source to an image point on the optical axis of the optical system, provides for change of position of the image point along the optical axis over a wide focusing range with suppression of generated aberration. In particular, the optical system comprises a light source both movable in the direction of the optical axis and capable of variation in wavelength and a diffraction grating lens system that condenses the beam from the light source onto an image point on and along the optical axis, which system is effective in cancelling out aberration generated due to movement of the light source. The spherical aberration associated with the movement of the image spot brought about by the movement of the light source or its equivalent in the optical system is cancelled out by the chromatic aberration generated by the diffraction grating created by adjustment the light source wavelength.
    • 一种光学系统,其包括具有足够相干性的光源以提供主要的工作波长和衍射光栅透镜系统,以将来自光源的光聚焦到光学系统的光轴上的图像点,从而提供位置的变化 的图像点沿着光轴在宽聚焦范围上,同时抑制所产生的像差。 特别地,该光学系统包括能够在光轴方向上移动并能够变化的光源和将来自光源的光束聚集到光轴上并沿着光轴的图像点上的衍射光栅透镜系统, 该系统有效地消除由于光源的移动而产生的像差。 由光源或其等效物在光学系统中的移动引起的像点移动所引起的球面像差由于通过调节光源波长而产生的衍射光栅产生的色差被抵消。