| Collimation method using a double grating system. | |
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MedLine Citation:
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PMID: 20539356 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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We present a collimation technique based on a double grating system to locate with high accuracy an emitter in the focal plane of a lens. Talbot self-images are projected onto the second grating producing moiré interferences. By means of two photodetectors positioned just behind the second grating, it is possible to determine the optimal position of the light source for collimation by measuring the phase shift between the signals over the two photodetectors. We obtain mathematical expressions of the signal in terms of defocus. This allows us to perform an automated technique for collimation. In addition, a simple and accurate visual criterion for collimating a light source using a lens is proposed. Experimental results that corroborate the proposed technique are also presented. |
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Authors:
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Luis Miguel Sanchez-Brea; Francisco Jose Torcal-Milla; Francisco Javier Salgado-Remacha; Tomás Morlanes; Isidoro Jimenez-Castillo; Eusebio Bernabeu |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Applied optics Volume: 49 ISSN: 1539-4522 ISO Abbreviation: Appl Opt Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-06-11 Completed Date: 2010-09-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0247660 Medline TA: Appl Opt Country: United States |
Other Details:
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Languages: eng Pagination: 3363-8 Citation Subset: - |
Affiliation:
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Universidad Complutense de Madrid, Applied Optics Complutense Group, Optics Department, Facultad de Ciencias Físicas, Ciudad Universitaria s.n., 28040, Madrid, Spain. sanchezbrea@fis.ucm.es |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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