Abstract
A holographic method of testing a concave grating with toric wavefronts is described. In this method a toric wavefront of steep asphericity but of simple form, produced in a particular grating mounting, is tested by reference to a similar toric wavefront reconstructed by a lensless Fourier-transform-type hologram. The interferometric system of grating and hologram is optimized using the light path function, and the good match between the two toric wavefronts is brought by relevantly using only coherent spherical wavefronts easily obtained. An example of the testing is given to verify the method.
© 1984 Optical Society of America
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