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    Chapter and Conference Paper

    Experimental Study on the Absolute Measurement of Flats

    We present an absolute method of shift-rotation to calibrate the flatness of flats. Compared with the conventional three-flat test method, the method requires only two flat and no flips of the flats. And there...

    Wenchuan Zhao, Weihong Song, Gaofeng Wu, Yongqian Wu in Fringe 2013 (2014)

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    Article

    Absolute measurement of flats with the method of shift-rotation

    We present an absolute measurement of flats in a Fizeau interferometer with the method of shift-rotation, which only requires rotational measurements and shift measurement with a translation. Experiments have ...

    Weihong Song, Fan Wu, ** Hou, Wenchuan Zhao, Yongjian Wan in Optical Review (2013)