✦ LIBER ✦

Measurement of focal length of lens using phase shifting Lau phase interferometry

✍ Scribed by C.J. Tay; M. Thakur; L. Chen; C. Shakher

Publisher: Elsevier Science
Year: 2005
Tongue: English
Weight: 290 KB
Volume: 248
Category: Article
ISSN: 0030-4018
DOI: 10.1016/j.optcom.2004.12.036

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✦ Synopsis

In this paper, we proposed a phase shifting Lau phase interferometry for the measurement of the focal length of a lens. The fundamentals of this application are discussed and the basis of the phase map interpretation is outlined. A three step phase-shifting algorithm is used to depict the phase maps of a lens-like test object and an application for measuring the focal length of a lens is reported. A phase map obtained with a coherent light source is also shown and the merits of using incoherent light over coherent light source are also discussed. Experimental results are presented.

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