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http://dx.doi.org/10.3807/KJOP.2015.26.3.147

Simultaneous Determination of Both Surface Profiles of a Bifocal Lens Using Dual-Wavelength Transmission Deflectometry With Liquid  

Shin, Sanghoon (KPS)
Yu, Younghun (Department of Physics, Cheju National University)
Publication Information
Korean Journal of Optics and Photonics / v.26, no.3, 2015 , pp. 147-154 More about this Journal
Abstract
We propose a method for simultaneously measuring the front and back surface profiles of transparent optical components. The proposed method combines dual-wavelength transmission deflectometry with liquids to record distorted phases at different wavelengths, and then numerically reconstructs the three-dimensional phase information to image the front and back surfaces of the lens. We propose a theoretical model to determine the surface information, and a bifocal lens is experimentally investigated. Unlike conventional transmission deflectometry, our proposed method supports direct observation of the front and back surface profiles of the optical elements.
Keywords
Deflectometry; Phase measuring deflectometry; Temporal phase unwrapping;
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