Finding the Optimal Polarizer
Summary This document provides an in-depth overview of linear polarization, the types of linear polarizers, and the key specifications for selecting the ideal polarizer for various applications. It details dichroic polymer, dichroic glass, wire grid, beamsplitting, and crystalline polarizers, emphasizing their transmission, contrast ratio, and other critical factors such as laser damage threshold and mechanical […]
New Optics for Astronomical Polarimetry
Summary New optical technologies are revolutionizing astronomical polarimetry by expanding the range of polarization optics for telescopes and scientific imaging. Liquid crystal retarders, including nematic liquid crystals and ferroelectric liquid crystals, offer electrical control of polarization with low voltage and fast response times, making them ideal for adaptive optics and infrared imaging. Polymer retarders provide […]
Compact Optical Beam Scanner
Geometric-phase microscopy (GPM) uses changes in the phase of light passing through biological specimens to yield high-resolution and high-contrast images, instead of relying on the attenuation of light used conventionally. Polarization optics and a spatial light modulator generate spatially variant polarization states of light that interact with the sample, creating a relative phase shift between transmitted and reflected light waves. By analyzing the phase information, GPM can reveal details not visible with other microscopy techniques. GPM is an effective non-invasive tool for live cell and tissue studies, with potential to enhance biological systems knowledge.
