Lens testing with a simple wavefront shearing interferometer.

A lens-testing system using a simple wavefront shearing interferometer is described. This simple cube interferometer has all the interferometric adjustments built in at manufacture. In contrast to most interferometric test systems, the wavefront shearing interferometer is inexpensive, portable, relatively insensitive to vibration, does not need laser illumination, and requires only a minimum of experimental time and operational expertise. Reading of the interferograms and subsequent data reduction require the major effort in testing with the wavefront shearing interferometer. However, with automatic scanning of the interferograms and a high-speed electronic computer to perform the analysis, the data reduction may be completely automated. Operation of the wavefront shearing interferometer is described together with the method of data reduction. Experimental results are also presented.

[1]  D. N. Grimes,et al.  Measurement of the second-order degree of coherence by means of a wavefront shearing interferometer. , 1971, Applied optics.

[2]  Robert J. Bruening,et al.  A New Interferometric Test and its Application to the 84-in. Reflecting Telescope at Kitt Peak National Observatory , 1968 .

[3]  M. V. R. K. Murty,et al.  The use of a single plane parallel plate as a lateral shearing interferometer with a visible gas laser source. , 1964 .

[4]  H. H. Hopkins,et al.  RESEARCH NOTES: The Numerical Evaluation of the Frequency Response of Optical Systems , 1957 .

[5]  Ambiguity of the Transfer Function with Partially Coherent Illumination , 1967 .

[6]  A Cornejo,et al.  A semiautomatic method for interpreting shearing interferograms. , 1968, Applied optics.

[7]  J. B. Saunders.  A simple, inexpensive wavefront shearing interferometer. , 1967, Applied optics.

[8]  E. H. Linfoot,et al.  Spherical aberration and the information content of optical images , 1957, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[9]  Richard Barakat.  Computation of the Transfer Function of an Optical System from the Design Data for Rotationally Symmetric Aberrations. Part I. Theory , 1962 .

[10]  D. Brown.  A Shearing Interferometer with Fixed Shear and Its Application to some Problems in the Testing of Astro-Optics , 1954 .

[11]  T L Williams,et al.  The Use of Standard Test Lenses for Verifyingthe Accuracy of OTF Equipment. , 1969, Applied optics.

[12]  J. DeVelis,et al.  Transfer Function for Cascaded Optical Systems , 1967 .