Skip to main content

Characterization of Fresnel images of an elongated circular grating

Buy Article:

$26.62 plus tax (Refund Policy)

We characterize theoretically and experimentally Fresnel images (or self-images) of an elongated circular (EC) grating which could be employed for the visual measurement of linear displacements in Talbot moiré deflectometry. Based on a Fresnel diffraction integral, we estimate the shape of the Fresnel image formed at a specific distance from the EC grating in which both parallel lines and semicircles are illuminated by a coherent plane wave. For a square type transmittance of the grating, we also compare the theoretical estimates with its self-images captured by an array of charge-coupled devices (CCD). We show that self-images of the EC grating are substantially aberrated near the center of the interface between the linear and semicircular parts but not in its off-central region. Moiré patterns by two self-imaged EC gratings are found not much affected by the central aberration.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Keywords: Self-image; Talbot effect; elongated circular grating

Document Type: Original Article

Affiliations: 1: Department of Physics, Hannam University, 133 Ojungdong, Taejon 300-791, Korea 2: Department of Physics Education, Kongju National University, 182 Sinkwandong, Kongju, Korea

Publication date: 2002-09-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more