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Optical Engineering

Practical designs for thin film wave plates
Author(s): Ian J. Hodgkinson; Qihong Wu
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Paper Abstract

Thin film wave plates are constructed by the oblique deposition of dielectric material onto glass substrates. Two basic designs incorporating biaxial columnar thin films have been proposed. The singlecolumn- angle plate provides different sensitivities of retardance to angular tilting, but suffers from thickness (and hence retardance) wedging. The double-column-angle plate is relatively insensitive to tilt and substantially free of wedging. However, both basic designs are susceptible to the ingress of atmospheric moisture, which has the effect of reducing the retardance. In this paper we describe modifications to the basic designs that seal the wave plates against the uptake of atmospheric moisture. The modifications eliminate wedging in the singlecolumn- angle plate, but the characteristic angular sensitivities of the basic designs are retained.

Paper Details

Date Published: 1 September 1998
PDF: 4 pages
Opt. Eng. 37(9) doi: 10.1117/1.601763
Published in: Optical Engineering Volume 37, Issue 9
Show Author Affiliations
Ian J. Hodgkinson, Univ. of Otago (New Zealand)
Qihong Wu, University of Otago (New Zealand)

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