Burning-glass
41stained glass — n. glass colored in any of various ways, as by fusing metallic oxides into it, by enameling, by burning pigments into its surface, etc. and used as for church windows stained glass adj …
42James Glass Bertram — (1824 – 3 March 1892) was a Scottish author. He was apprenticed to Tait s Edinburgh Magazine and became managing clerk,[1] before joining a company of strolling players. He returned to Edinburgh and set up as a bookseller and newsagent. In 1855… …
43night glass — Night Night (n[imac]t), n. [OE. night, niht, AS. neaht, niht; akin to D. nacht, OS. & OHG. naht, G. nacht, Icel. n[=o]tt, Sw. natt, Dan. nat, Goth. nahts, Lith. naktis, Russ. noche, W. nos, Ir. nochd, L. nox, noctis, Gr. ny x, nykto s, Skr. nakta …
44convex lens — Burning glass …
45Lens (optics) — For other uses, see Lens. A lens. Lenses can be used to focus light. A lens is an optical device with perfect or approximate axial symmetry which tra …
46Match — For other uses, see Match (disambiguation). An igniting match …
47Timeline of telescope technology — Timeline of telescope technology* c.2560 BC c.860 BC Egyptian artisans polish rock crystal, semi precious stones, and latterly glass to produce facsimile eyes for statuary and mummy cases. The intent appears to be to produce an optical illusion.… …
48Aspheric lens — An aspheric lens or asphere is a lens whose surfaces have a profile that is neither a portion of a sphere nor of a circular cylinder. In photography, a lens assembly that includes an aspheric element is often called an aspherical lens.The asphere …
49Optical Instruments — (Roget s Thesaurus) < N PARAG:Optical Instruments >N GRP: N 1 Sgm: N 1 optical instruments optical instruments Sgm: N 1 lens lens meniscus magnifier Sgm: N 1 microscope microscope megascope tienoscope GRP: N 2 Sgm: N 2 spect …
50sunglass — noun a convex lens that focuses the rays of the sun; used to start a fire • Hypernyms: ↑converging lens, ↑convex lens * * * ˈ ̷ ̷ˌ ̷ ̷ adjective Etymology: back formation from sunglasses : of or relating to sunglasses a low priced sunglass lens …
