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CR-39 is about half the weight of glass with an index of refraction only slightly lower than that of crown glass, and its high Abbe number yields low chromatic aberration, altogether making it an advantageous material for eyeglasses and sunglasses. A wide range of colors can be achieved by dyeing of the surface or the bulk of the material.
The Google Glass prototype resembled standard eyeglasses with the lens replaced by a head-up display. [21] In mid-2011, Google engineered a prototype that weighed 8 pounds (3.6 kg); [22] by 2013 they were lighter than the average pair of sunglasses. [1] A Glass prototype seen at Google I/O in June 2012. The product was publicly announced in ...
Photograph of a triangular prism, dispersing light Lamps as seen through a prism. In optics, a dispersive prism is an optical prism that is used to disperse light, that is, to separate light into its spectral components (the colors of the rainbow). Different wavelengths (colors) of light will be deflected by the prism at different angles. [1]
Unlike conventional prescription glasses, pinhole glasses produce an image without the pincushion effect around the edges (which makes straight lines appear curved). While pinhole glasses are claimed to be useful for people who are both near- and far-sighted, they are not recommended [citation needed] for people with over 6 diopters of myopia.
The regular b-side for the "Cheap Sunglasses" single was the Degüello album track "Esther Be The One". The promo single included the live version of "Cheap Sunglasses" instead. This version was included on Chrome, Smoke & BBQ box set its compilation counterpart Rancho Texicano: The Very Best of ZZ Top.
Luxottica Carlos sunglasses, produced by Luxottica prior to its licensing deals with fashion houses. Leonardo Del Vecchio started the company in 1961, [16] in Agordo north of Belluno, Veneto; today the company is headquartered in Milan, Italy.