Optical Review
Print ISSN : 1340-6000
ISSN-L : 1340-6000
Mitigation of Diffraction Fringe in Quasi-Far Field Pattern Using an Edge-Shaped Plate
Noriaki NISHITakahisa JITSUNOMasahiro NAKATSUKA
Author information
JOURNAL FREE ACCESS

1998 Volume 5 Issue 1 Pages 39-42

Details
Abstract
A new concept is developed for improving the laser intensity distribution in quasi-far field using geometrical optics of a continuous phase (so-called edge-shaped plate). The diffraction fringe on a quasi-far field beam pattern of a well collimated He-Ne laser beam 5 cm in diameter is mitigated by the insertion of an edge-shaped plate with a super-Gaussian (n=40) surface profile. A diffraction code using Fresnel-Kirchhoff diffraction integration was developed to calculate diffraction patterns of aspherical optical elements. The measured beam profile is in good agreement with the calculated beam pattern.
Content from these authors

This article cannot obtain the latest cited-by information.

© 1998 by the Optical Society of Japan
Previous article Next article
feedback
Top