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Adjustable spiral phase plate

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Abstract

A spiral phase retarder ϕ(r, θ) = mθ has been constructed with use of a deformed cracked plexiglass plate. By changing the degree of deformation, the retarder can be adjusted for use at any wavelength, and the value of the phase step 2πm at θ = 2π can be chosen.

© 2004 Optical Society of America

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