2024 : 4 : 22
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
Specification of multiple image characteristics viewed through a grating
Type
JournalPaper
Keywords
vision, grating, image formation
Year
2016
Journal European Journal of Physics
DOI
Researchers Mohammad Abolhassani

Abstract

When a person observes an object, illuminated incoherently by a quasimonochromatic source, through a grating, he will see more than one image. Angular positions of these images are derived in terms of wavelength, period of the grating, separation between the object and the grating, and position of the object relative to the observer. In a special case, when the object is another grating, the condition of coincidence of its multiple images is investigated. The relation derived is, to some extent, similar to that seen in the Lau effect. As a secondary outcome, it is shown that the sum of the squared modulus of the odd Fourier series coefficients for a binary grating function is equal to that of the even coefficients.