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    • 1. 发明授权
    • Method of measuring refractive indices of lens and sample liquid
    • 测量透镜和样品液体的折射率的方法
    • US5151752A
    • 1992-09-29
    • US707438
    • 1991-05-28
    • Masahiro OonoTohru Chiba
    • Masahiro OonoTohru Chiba
    • G01M11/02G01N21/03G01N21/41
    • G01N21/41G01M11/0228G01N2021/0342
    • A method of measuring a refractive index distribution of a lens is disclosed which comprises, immersing a glass sample and a lens under test within a matching fluid whose refractive index differs slightly from that of the glass to be tested, the glass sample having a refractive index and a shape which are both known and the lens to be tested having an unknown refractive index but a known shape, allowing coherent light to pass through the glass sample and the lens under test; superposing the transmitted light wave on a reference light wave to generate interference fringes, outputting the intensity distribution of interference fringes that are generated by the light wave that has passed through the glass sample, determining the refractive index of the matching fluid on the basis of the resulting output, outputting the intensity distribution of interference fringes that are generated by the light wave that has passed through the lens under test; separating from the resulting output the defocus term and aberration terms in the polynomial which expresses the produced interference fringes; determining the average refractive index of the lens under test from the separated defocus term and the refractive index of the matching fluid; and determining the refractive index distribution of the lens under test from the aberrations terms.
    • 公开了一种测量透镜的折射率分布的方法,其包括将玻璃样品和被测试透镜浸入与所测试的玻璃的折射率略微不同的匹配流体中,所述玻璃样品具有折射率 以及具有未知的折射率和已知形状的被测试的透镜的形状,允许相干光通过玻璃样品和被测镜片; 将透射的光波叠加在参考光波上以产生干涉条纹,输出由已经通过玻璃样品的光波产生的干涉条纹的强度分布,基于该光束确定匹配流体的折射率 输出由通过被测镜头的光波产生的干涉条纹的强度分布; 从所得输出中分离表示所产生的干涉条纹的多项式中的散焦项和像差项; 从分离的散焦项和匹配流体的折射率确定被测透镜的平均折射率; 以及根据像差项确定被测透镜的折射率分布。
    • 3. 发明授权
    • Scanning optical device
    • 扫描光学设备
    • US6064504A
    • 2000-05-16
    • US791977
    • 1997-01-31
    • Tadashi MinakuchiMasahiro OonoMitsunori IimaHiroshi Kanazawa
    • Tadashi MinakuchiMasahiro OonoMitsunori IimaHiroshi Kanazawa
    • B41J2/47G02B26/12G02B26/08
    • B41J2/471G02B26/123G02B26/124
    • A scanning optical device includes a light source that emits a light beam; a deflector for deflecting and scanning the light beam from the light source; a scanning lens for converging the deflected light beam onto an image surface; and a mechanism for adjusting the relative position of at least one lens element of the scanning lens with respect to other lens elements of the scanning lens in an auxiliary scanning direction. Preferably, the adjustable lens element of the scanning lens be provided with an anamorphic surface having relatively larger power in the auxiliary scanning direction than in the main scanning direction. Alternatively, the above-mentioned at least one lens element may have the largest absolute value of refractive power of the lenses in the scanning lens. Further alternatively, the above-mentioned at least one lens element may be provided with a surface having the smallest absolute value of radius of curvature of all surfaces in the scanning lens.
    • 扫描光学装置包括发射光束的光源; 偏转器,用于偏转和扫描来自光源的光束; 用于将偏转的光束会聚到图像表面上的扫描透镜; 以及用于调整扫描透镜的至少一个透镜元件相对于扫描透镜的其它透镜元件在辅助扫描方向上的相对位置的机构。 优选地,扫描透镜的可调节透镜元件设置有在辅助扫描方向上比在主扫描方向上具有相对较大功率的变形表面。 或者,上述至少一个透镜元件可以具有扫描透镜中的透镜的屈光力的绝对值的最大值。 此外,上述至少一个透镜元件可以设置有扫描透镜中所有表面的曲率半径绝对值最小的表面。