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Sheeting has replaced button copy as the predominant type of retroreflector used in roadway signs. There are several grades of retroreflective sheeting which include the three major grades: engineer grade, high intensity prismatic (HIP) and diamond grade. Within these categories are further delineations based on material used and visibility ...
A set of three mutually perpendicular reflective surfaces, placed to form the internal corner of a cube, work as a retroreflector. The three corresponding normal vectors of the corner's sides form a basis (x, y, z) in which to represent the direction of an arbitrary incoming ray, [a, b, c].
Spatial light modulators can be either reflective or transmissive depending on their design and purpose. [4] DMDs, short for digital micromirror devices, are spatial light modulators that specifically work with binary amplitude-only modulation. [5] [6] Each pixel on the SLM can only be in one of two states: "on" or "off". The main purpose of ...
The LCD backlight systems are made highly efficient by applying optical films such as prismatic structure (prism sheet) to gain the light into the desired viewer directions and reflective polarizing films that recycle the polarized light that was formerly absorbed by the first polarizer of the LCD (invented by Philips researchers Adrianus de ...
Reflective prisms use total internal reflection to achieve near-perfect reflection of light that strikes the facets at a sufficiently oblique angle. Prisms are usually made of optical glass which, combined with anti-reflective coating of input and output facets, leads to significantly lower light loss than metallic mirrors.
A high-refractive-index polymer (HRIP) is a polymer that has a refractive index greater than 1.50. [1]Such materials are required for anti-reflective coating and photonic devices such as light emitting diodes (LEDs) and image sensors.