Any-orientation shear-plate tester by two rotating ways

Deyan Xu

doi:10.1117/12.369205

11 November 1999 Any-orientation shear-plate tester by two rotating ways

Deyan Xu

Proceedings Volume 3782, Optical Manufacturing and Testing III; (1999) https://doi.org/10.1117/12.369205
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

On the basis of our papers, a new wedge plate shearing interferometer has been developed to evaluate and measure collimation, divergence and other parameters of laser beams and the amount of defocusing of systems of collimator and beam expander. It also can be used to test wavefront aberrations and to adjust optical systems. This is an ordinary shear plate interferometer but in order to obtain a quantitative result, it didn't apply the conventional method which is used to measure fringe width and angle, and it is impossible to give a high precision results. A reliable and high precise method is measuring the rotating angle of the plate about the center normal line of the front surface of the plate. Above method belongs to one-dimensional shearing interference. In order to test rotational asymmetric wavefront, the plate can be rotated about the optical axis of the incident laser beam. As a result any orientation shear (horizontally, vertically and at 45 degree or other angles) can be given. This instrument allows quick and easy measurement of the defocus, and third order spherical aberration, coma, and astigmatism in the system.

Citation Download Citation

Deyan Xu "Any-orientation shear-plate tester by two rotating ways", Proc. SPIE 3782, Optical Manufacturing and Testing III, (11 November 1999); https://doi.org/10.1117/12.369205

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KEYWORDS

Monochromatic aberrations

Wavefronts

Collimation

Collimators

Analytical research

Fringe analysis

Interferometers

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