Bilayer pellicle and bilayer-coated prism beamsplitters for the division-of-amplitude photopolarimeter

Rasheed M. A. Azzam; A. De; F. F. Sudradjat

doi:10.1117/1.1951587

1 July 2005 Bilayer pellicle and bilayer-coated prism beamsplitters for the division-of-amplitude photopolarimeter

Rasheed M. A. Azzam, A. De, F. F. Sudradjat

Author Affiliations +

Optical Engineering, Vol. 44, Issue 7, 073802 (July 2005). https://doi.org/10.1117/1.1951587

Abstract

A procedure is presented for the design of bilayer pellicle and bilayer-coated prism beam splitters that serve as the key optical element of the division-of-amplitude photopolarimeter (DOAP). The bilayer consists of two transparent thin films of sufficiently different refractive indices whose thicknesses are selected to achieve 50 to 50% split ratio and optimum ellipsometric parameters in reflection and transmission, such that the determinant of the DOAP instrument matrix is maximized at the proper angle of incidence. As a specific example, we present a Ge-coated nitrocellulose (NC) first-order pellicle beamsplitter for the near IR (2.0 to 2.2 µm). Visible designs include a GaP-coated NC fourth-order pellicle and a SiO₂-GaP bilayer-coated glass prism at and near the 633-nm wavelength. Operation of these beamsplitters over a range of incidence angles, wavelengths, and in the presence of ±5% film thickness errors is also considered.

©(2005) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Rasheed M. A. Azzam, A. De, and F. F. Sudradjat "Bilayer pellicle and bilayer-coated prism beamsplitters for the division-of-amplitude photopolarimeter," Optical Engineering 44(7), 073802 (1 July 2005). https://doi.org/10.1117/1.1951587

Published: 1 July 2005

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