Parallel-slab division-of-amplitude photopolarimeter

Abstract

A division-of-amplitude photopolarimeter (DOAP) is described that uses a dielectric parallel-slab (PS) beam splitter that is coated with a high-reflectance metal on one side at oblique incidence. The instrument matrix of the PS DOAP is nonsingular, hence all four Stokes parameters can be measured simultaneously over a broad (UV-visible-IR) spectral range. The parallel, evenly spaced, ref lected beams simplify interfacing of the PS DOAP with linear photodetector arrays for both single-wavelength and spectroscopic polarimetry. The PS DOAP has several degrees of freedom that can be controlled for optimum performance.

Polarization measurement through combination polarizers

“…Then using the instrument matrixes and output signal can calculate polarization state of the incident light. This way is limited by the instrument matrixes in a narrow wavelength range [5][6][7][8][9] .…”

Tilted parallel dielectric slab as a multilevel attenuator for incident p- or s-polarized light

“…First-order blooming leads to a set of discrete attenuation levels that depend only on the number of internal reflections inside the slab but that are independent of the slab refractive index, incident (p or s) linear polarization, or the presence of identical transparent surface layers at the front and back sides of the slab. Tilted dielectric slabs are also key elements of divisionof-amplitude photopolarimeters that are used for partial or complete measurement of the state of polarization of light [11][12][13].…”

<title>High-efficiency all-dielectric strip-coated beam splitters for the equipartition of infrared input power</title>

“…If the front surface reflectance is defined to be R at the kth strip, and Ak is the absorbance loss in the reflective coating in the kth strip, the corresponding transmittance will be : Tk=!-R-Ak. (2) We require that all components be of equal power, i.e. :…”