Precision focal-length measurement using imaging conjugates

Lin-Yao Liao; Bráulio Fonseca Carneiro de Albuquerque; Robert E. Parks; José Sasián

doi:10.1117/1.OE.51.11.113604

2 November 2012 Precision focal-length measurement using imaging conjugates

Lin-Yao Liao, Bráulio Fonseca Carneiro de Albuquerque, Robert E. Parks, José Sasián

Author Affiliations +

Optical Engineering, Vol. 51, Issue 11, 113604 (November 2012). https://doi.org/10.1117/1.OE.51.11.113604

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.

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Lin-Yao Liao, Bráulio Fonseca Carneiro de Albuquerque, Robert E. Parks, and José Sasián "Precision focal-length measurement using imaging conjugates," Optical Engineering 51(11), 113604 (2 November 2012). https://doi.org/10.1117/1.OE.51.11.113604

Published: 2 November 2012

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