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Optical Engineering

Precision focal-length measurement using imaging conjugates
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Paper Abstract

A method for effective focal length measurement using imaging conjugates is discussed and demonstrated. This method is used to determine the effective focal length of an objective lens with precision and without the need to know the exact position of the principal planes by measuring relative distances of imaging conjugates. Focal length determination was done with the aid of an interferometer and with a precision of ±0.054%. A discussion of the method is presented and an error analysis discussed. This method can be used for characterizing optical systems with a wide range of focal lengths because of its simple experimental configuration.

Paper Details

Date Published: 2 November 2012
PDF: 5 pages
Opt. Eng. 51(11) 113604 doi: 10.1117/1.OE.51.11.113604
Published in: Optical Engineering Volume 51, Issue 11
Show Author Affiliations
Lin-Yao Liao, College of Optical Sciences, The Univ. of Arizona (United States)
Bráulio Fonseca Carneiro de Albuquerque, Instituto Nacional de Pesquisas Espaciais (United States)
Robert E. Parks, College of Optical Sciences, The Univ. of Arizona (United States)
José Sasián, College of Optical Sciences, The Univ. of Arizona (United States)


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