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Optical Engineering

Cylindrical-lens-based wavefront-reversing shear interferometer for the spatial coherence measurement of UV radiations
Author(s): Om Prakash; Ramakant Mahakud; H. S. Vora; S. K. Dixit
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Paper Abstract

We present the design and results of a cylindrical-lens-based reversal shear interferometer for measuring the spatial coherence of partially or fully coherent UV beams. This is a modified Michelson interferometer consisting of only four optical components. The wavefront is reversed in one of the interferometer's arm by the combination of a plane mirror located at the focal plane of a cylindrical lens. The selected wavefront can be sheared at any arbitrary angle with respect to the incident wavefront by rotating the cylindrical lens, thus enhancing the capability of this design for a real 3-D wavefront evaluation. This interferometer is used to measure the spatial coherence of 255-nm UV radiations obtained from the second harmonic of a copper vapor laser for pump beams of different spatial coherence characteristics, a result being reported for the first time.

Paper Details

Date Published: 1 May 2006
PDF: 6 pages
Opt. Eng. 45(5) 055601 doi: 10.1117/1.2205847
Published in: Optical Engineering Volume 45, Issue 5
Show Author Affiliations
Om Prakash, Raja Ramanna Ctr. for Advanced Technology (India)
Ramakant Mahakud, Raja Ramanna Ctr. for Advanced Technology (India)
H. S. Vora, Ctr. for Advanced Technology (India)
S. K. Dixit, Ctr. for Advanced Technology (India)

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