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    • 5. 发明授权
    • Speckle noise reduction based on longitudinal shift of sample
    • 基于样品纵向偏移的散斑降噪
    • US08687253B2
    • 2014-04-01
    • US13324845
    • 2011-12-13
    • Chung-Chieh YuIsao MatsubaraMamoru Miyawaki
    • Chung-Chieh YuIsao MatsubaraMamoru Miyawaki
    • G03H1/26
    • G03H1/0443G03H1/32G03H2001/0456G03H2001/0825G03H2001/2655G03H2227/03
    • A method and apparatus for reducing speckle noise in an image of an object are disclosed. The method includes, placing the object in an interferometer at a first position along a beam path of an object beam, irradiating the object with the object beam, moving the object from the first position to a second position by longitudinally shifting the object along the beam path of the object beam, irradiating the object with the object beam at the second position. At each of the first and second positions a holographic image formed by interference between the object beam and a reference beam is recorded. An object image with reduced speckle noise is obtained by averaging the holographic images. Either an arithmetic mean or a weighted average may be used in the averaging of the holographic images.
    • 公开了一种用于减少物体的图像中的斑点噪声的方法和装置。 该方法包括:将物体沿着物体光束的光束路径放置在干涉仪的第一位置,用物体光束照射物体,通过沿着光束纵向移动物体将物体从第一位置移动到第二位置 物体光束的路径,在物体光束的第二位置照射物体。 在第一和第二位置的每一个处记录由物体光束和参考光束之间的干涉形成的全息图像。 通过平均全息图像获得具有减少的斑点噪声的对象图像。 在全息图像的平均中可以使用算术平均值或加权平均值。
    • 9. 发明授权
    • Method and apparatus for measuring refractive index based on a ratio between a number of second fringes divided by a difference of the number of second fringes minus a number of first fringes
    • 用于根据第二条纹的数量除以第二条纹数减去第一条纹数量之差的比率来测量折射率的方法和装置
    • US08687204B2
    • 2014-04-01
    • US13071383
    • 2011-03-24
    • Chung-Chieh Yu
    • Chung-Chieh Yu
    • G01N21/41
    • G01N21/45
    • A method and apparatus for measuring refractive index of an object are disclosed. The method includes, acquiring a number of first fringes of a first interference pattern formed by interference of a first beam of light transmitted through the object with a second beam of light not transmitted through the object; acquiring a number of second fringes of a second interference pattern formed by interference of a third beam of light reflected from a first surface of the object with a fourth beam of light transmitted through the object and reflected from a second surface of the object; and calculating the refractive index of the object based on the number of first fringes and the number of second fringes. The method may further include calculating the Abbe number of the object based on the refractive indices of the object measured at different wavelengths.
    • 公开了一种用于测量物体折射率的方法和装置。 该方法包括:获取由透射通过物体的第一光束的干涉而形成的第一干涉图案的第一条纹和不透过物体的第二光束; 获取由从物体的第一表面反射的第三光束的干涉与透射通过物体并从物体的第二表面反射的第四光束的干涉形成的第二干涉图案的多个第二条纹; 并且基于第一条纹的数量和第二条纹的数量来计算物体的折射率。 该方法还可以包括基于在不同波长处测量的物体的折射率来计算物体的阿贝数。