A piece of glass shaped for a special purpose, e.g. one of the glasses of a pair of spectacles, a lens, a watch-glass.
| 单词 | θ64921 |
| 释义 | the world > physical sensation > sight and vision > optical instruments > lens > [noun] (94) glass1545 A piece of glass shaped for a special purpose, e.g. one of the glasses of a pair of spectacles, a lens, a watch-glass. optic1599 Originally: †a simple lens, as an eyeglass or magnifying glass; (also) †an optical instrument, as a telescope (obsolete). Now: a camera lens. Also… optic glass1607 A lens; an instrument having a lens; spec. a telescope. Also figurative. perspicil1611 A lens; an optical instrument, as a telescope or microscope. Also figurative. lenticular1658 A lenticular glass or lens. spectacle-glass1682 A lens used as, or in, a microscope or telescope. Obsolete. lens1693 A piece of glass, or other transparent substance, with two curved surfaces, or one plane and one curved surface, serving to cause regular… speculum1756 A mirror or reflector (of glass or metal) used for some scientific purpose; †a lens. optical1944 An item of optical equipment; a lens; a pair of spectacles. Usually in plural. lenslet1956 A small lens, esp. one of many in a compound eye or a lenticular film. Subcategories:— qualities of lenses (11) — focal length or point (7) — focus (1) — centre (1) — each extremity of axis (1) — series of lenses (2) — eye-piece (11) — object glass (6) — burning glass (4) — other lenses (27) — plate of glass used like a lens (1) — stop (2) — socket for mounting lenses (1) — making parfocal (1) — focusing (1) — measurement of focal distance (1) — correction (2) — making smaller (1) — zooming (1) — effects resembling those produced by lens (2) |
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