Share Email Print

Proceedings Paper

Evaluation of focal length of a lens using the Lau effect
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Focal length of a lens is measured in a Lau setup with binary gratings. An integer order of Lau fringes appears in some conditions where a proper relation is satisfied between the involved separation distances of the setup elements, gratings periods, wavelength, and focal length of the test lens. Focal length of the lens is given by fitting the relevant theoretical curve with some unknown constants, including the focal length, to the gained experimental data. Precision of this measurement is of order of 1 mm for a lens with focal length of about 30 cm.

Paper Details

Date Published: 22 June 2015
PDF: 6 pages
Proc. SPIE 9525, Optical Measurement Systems for Industrial Inspection IX, 95254F (22 June 2015); doi: 10.1117/12.2185088
Show Author Affiliations
Mohammad Abolhassani, Arak Univ. (Iran, Islamic Republic of)

Published in SPIE Proceedings Vol. 9525:
Optical Measurement Systems for Industrial Inspection IX
Peter Lehmann; Wolfgang Osten; Armando Albertazzi Gonçalves Jr., Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?