A scanning Hartmann test method is proposed and its measurement principle is described. The scanning Hartmann test setup is formed by modifying the Hartmann screen of the conventional Hartmann test setup. With the rotation of the scanning Hartmann screen and the improved hole arrangement, the whole information of the lens to be tested in the full aperture can be obtained. The measurement accuracy of the aberration is improved and the local error of the lens can be got. In the method, no change of the Hartmann screen is needed for measuring the lenses of different aperture sizes. Experimental results of aberration measurements of two lenses are given to verify the usefulness of the setup.
© 2006 Chinese Optics Letters
(080.0080) Geometric optics : Geometric optics
(080.1010) Geometric optics : Aberrations (global)
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(220.4840) Optical design and fabrication : Testing
Dan Liu, Huijie Huang, Bingqiang Ren, Aijun Zeng, Yan Yan, and Xiangzhao Wang, "Scanning Hartmann test method and its application to lens aberration measurement," Chin. Opt. Lett. 4, 725-728 (2006)