Hariharan, P. ; Roy, M. (2007) Improved pinhole spatial filter Optics & Laser Technology, 39 (1). pp. 155-156. ISSN 0030-3992
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00303...
Related URL: http://dx.doi.org/10.1016/j.optlastec.2005.04.002
Abstract
If the pinhole placed at the focus of a microscope objective to spatially filter a laser beam is replaced by an annular phase mask, it is possible to obtain a clean beam providing very nearly uniform illumination over an extended area. We now show that even better results can be obtained by adding an absorbing layer to the mask.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Laser Beams; Beam Expansion; Uniform Illumination |
| ID Code: | 12522 |
| Deposited On: | 13 Nov 2010 13:25 |
| Last Modified: | 03 Jun 2011 06:38 |
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