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Title: Simple focal-length measurement technique with a circular Dammann grating

Abstract

A novel technique for focal-length measurements with a circular Dammann grating is presented. In the back focal plane of the lens under test, a one-order circular Dammann grating with limited aperture will produce double-humped radial rings. The separation between the two lobes varies with the displacement of the observed plane from the focal plane of the lens. By searching for the position at which the separation is minimal, the focal point of the lens can be located and hence the back focal length can be determined. Experimental results demonstrated that this method is efficient and can be used effectively for a quick check of focal length.

Authors:
; ;
Publication Date:
OSTI Identifier:
20854005
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Optics; Journal Volume: 46; Journal Issue: 1; Other Information: DOI: 10.1364/AO.46.000044; (c) 2007 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APERTURES; DIFFRACTION GRATINGS; LENGTH; LENSES; TESTING

Citation Formats

Zhao Shuai, Wen, J.F., and Chung, P.S. Simple focal-length measurement technique with a circular Dammann grating. United States: N. p., 2007. Web. doi:10.1364/AO.46.000044.
Zhao Shuai, Wen, J.F., & Chung, P.S. Simple focal-length measurement technique with a circular Dammann grating. United States. doi:10.1364/AO.46.000044.
Zhao Shuai, Wen, J.F., and Chung, P.S. Mon . "Simple focal-length measurement technique with a circular Dammann grating". United States. doi:10.1364/AO.46.000044.
@article{osti_20854005,
title = {Simple focal-length measurement technique with a circular Dammann grating},
author = {Zhao Shuai and Wen, J.F. and Chung, P.S},
abstractNote = {A novel technique for focal-length measurements with a circular Dammann grating is presented. In the back focal plane of the lens under test, a one-order circular Dammann grating with limited aperture will produce double-humped radial rings. The separation between the two lobes varies with the displacement of the observed plane from the focal plane of the lens. By searching for the position at which the separation is minimal, the focal point of the lens can be located and hence the back focal length can be determined. Experimental results demonstrated that this method is efficient and can be used effectively for a quick check of focal length.},
doi = {10.1364/AO.46.000044},
journal = {Applied Optics},
number = 1,
volume = 46,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}