RRI Digital Repository >
05. Light and Matter Physics >
Research Papers (LAMP) >

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3142

Title: Modified pinhole spatial filter producing a clean flat-topped beam
Authors: Hariharan, P.
Narayanan, Andal
Keywords: Laser beams
Beam expansion;
Uniform illumination
Issue Date: Mar-2004
Publisher: Elsevier B.V.
Citation: Optics & Laser Technology, 2004, Vol.36, p151-153
Abstract: The expanded beam from a laser has a sharply peaked intensity profile. As a result, in many applications where uniform illumination of an extended field is required, it is only possible to use the central part of the beam. We show that if the pinhole normally used to spatially filter the beam is replaced by an annular phase mask, it should be possible to obtain a clean beam providing very nearly uniform illumination over an extended area, with a minimal loss of light.
Description: Restricted Access.
URI: http://hdl.handle.net/2289/3142
ISSN: 0030-3992
Alternative Location: http://dx.doi.org/10.1016/j.optlastec.2003.07.006
Copyright: 2004 Elsevier B.V.
Appears in Collections:Research Papers (LAMP)

Files in This Item:

File Description SizeFormat
2004 OLT 36 p151.pdfRestricted Access176.59 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


    RRI Library DSpace