Optics. A perforated plate or diaphragm used to cut off marginal rays of light round a lens. Cf. diaphragm, n. 4a. Also in Photography, a…
| 单词 | θ229721 |
| 释义 | society > leisure > the arts > visual arts > photography > camera > parts and accessories of camera > [noun] > lens > diaphragms (3) stop1831 Optics. A perforated plate or diaphragm used to cut off marginal rays of light round a lens. Cf. diaphragm, n. 4a. Also in Photography, a… iris-diaphragm1867 a contractile diaphragm for lenses, contrived so as to imitate the action of the iris. iris1911 Photography. = iris-diaphragm n. at compounds 2; also attributive. Also iris-in n.,iris-out n. (see quots. 1959, 1959): both used as verbs. Also trans… |
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