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Poly Inc., formerly Polycom, is an American multinational corporation that develops video, voice and content collaboration and communication technology. Poly is a subsidiary of HP Inc. [ 2 ] [ 3 ] Polycom was co-founded in 1990 by Brian L Hinman and Jeffrey Rodman. [ 4 ]
The first contact lenses were made of glass, in 1888. Initially the glass was blown but soon lenses were made by being ground to shape. For the first fifty years, glass was the only material used. The lenses were thin, yet reports of injury were rare. In 1938 perspex (polymethylmethacrylate, or PMMA) began to replace glass in contact lens ...
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Poly(2-hydroxyethyl methacrylate) (pHEMA) is a polymer that forms a hydrogel in water. Poly (hydroxyethyl methacrylate) (PHEMA) hydrogel for intraocular lens (IOL) materials was synthesized by solution polymerization using 2-hydroxyethyl methacrylate as raw material, ammonium persulfate and sodium pyrosulfite (APS/SMBS) as catalyst, and triethyleneglycol dimethacrylate (TEGDMA) as cross ...
HP-GL, short for Hewlett-Packard Graphics Language and often written as HPGL, is a printer control language created by Hewlett-Packard (HP). HP-GL was the primary printer control language used by HP plotters. [1] It was introduced with the plotter HP-9872 in 1977 and became a standard for almost all
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In optics and lens design, the Abbe number, also known as the Vd-number or constringence of a transparent material, is an approximate measure of the material's dispersion (change of refractive index versus wavelength), with high values of Vd indicating low dispersion.
The first Newport, known as the Chrysler Newport Phaeton, was produced during 1940 and 1941.It was a dual-cowl phaeton that used the 323.5 cu in (5.3 L) Chrysler Straight Eight "Spitfire" engine with dual carburetors coupled to a three-speed manual transmission.
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