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Mohammad Abolhassani

Mohammad Abolhassani

Academic rank: Associate Professor
ORCID: https://orcid.org/0000-0001-6112-0709
Education: PhD.
ScopusId: 16174353100
Faculty: Science
Address: Arak University
Phone:

Research

Title
Evaluation of focal length of a lens using the Lau effect
Type
Presentation
Keywords
Focal length, Lau effect
Year
2015
Researchers Mohammad Abolhassani

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