Widefield heterodyne interferometry using a custom CMOS modulated light camera

Patel, Rikesh and Achamfuo-Yeboah, Samuel and Light, Roger and Clark, Matt (2011) Widefield heterodyne interferometry using a custom CMOS modulated light camera. Optics Express, 19 (24). pp. 24546-24556. ISSN 1094-4087

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Abstract

In this paper a method of taking widefield heterodyne inter- ferograms using a prototype modulated light camera is described. This custom CMOS modulated light camera (MLC) uses analogue quadrature demodulation at each pixel to output the phase and amplitude of the modu- lated light as DC voltages. The heterodyne interference fringe patterns are generated using an acousto-optical frequency shifter (AOFS) in an arm of a Mach-Zehnder interferometer. Widefield images of fringe patterns acquired using the prototype MLC are presented. The phase can be measured to an accuracy of ±6.6◦. The added value of this method to acquire widefield images are discussed along with the advantages.

Item Type: Article
Additional Information: This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-19-24-24546. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Schools/Departments: University of Nottingham UK Campus > Faculty of Engineering
Identification Number: https://doi.org/10.1364/OE.19.024546
Depositing User: Grogan, Mrs Jane
Date Deposited: 29 Apr 2014 10:08
Last Modified: 15 Sep 2016 02:11
URI: http://eprints.nottingham.ac.uk/id/eprint/2870

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