| 单词 | pancake lens |
| 释义 | > as lemmaspancake lens pancake lens n. (a) Physics an electron lens of flat, circular form (rare); (b) Photography a thin flat primary lens for a camera. ΚΠ 1969 R. Bassett & T. Mulvey in Zeitschr. f. Angewandte Physik 27 143/1 Eq. (1)..is still a good approximation for helices in which the axial thickness S is less than one tenth of the mean diameter of the helix. Such lenses are known as ‘pancake’ lenses. 1986 R. H. Geiss & A. D. Romig in D. C. Joy et al. Princ. Analyt. Electron Microsc. ii. 53 The first is the ‘pancake’ lens, Figure 24, which consists of a partly shielded, flat or helical coil. 1997 Photo Answers Mar. 53/1 Mick Bidewell's submission, in which the Pentax 40mm f/2.8 was described as a ‘pancake lens’ was no mis-print. 2005 Digital Photographer No. 31. 101/3 Paired with the new 40mm pancake lens, the camera takes images that are perfectly sharp. 2010 N.Y. Times (National ed.) 13 May b8/5 Both cameras will be sold with either a 16-millimeter pancake lens or an 18- to 55-millimeter zoom. < as lemmas |
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