| 释义 |
lenticular, a. and n.|lɛnˈtɪkjʊlə(r)|
[ad. late L. lenticulāris, f. lenticula, dim. of lent-, lens lentil: see lens n. Cf. F. lenticulaire.]
A. adj.
1. a. Having the form of a lens or of a lentil; resembling a lens or lentil in form; double convex.
1658Rowland Moufet's Theat. Ins. Ep. Ded., Lenticular optick Glasses of crystal. 1691Ray Creation ii. (1692) 24 The Crystalline Humour, which is of a lenticular Figure. 1777Lightfoot Flora Scot. II. 1049 The lenticular seed⁓vessels white. 1811Pinkerton Petral. I. 521 They have all a lenticular form very much flattened. 1830R. Knox Béclard's Anat. 46 Hewson..found the red particles of the human blood to be lenticular. 1845Lindley Sch. Bot. viii. (1858) 151 It [duckweed] consists of lenticular floating fronds. 1867–77G. F. Chambers Astron. i. vii. 93 The Zodiacal Light is a peculiar nebulous light of a conical or lenticular form. 1875Bennett & Dyer Sachs' Bot. 58 Lenticular grains (e.g. in the endosperm of wheat) have a lenticular nucleus.
b. Special collocations: lenticular bed Geol., ‘a bed which thins away in all directions’ (Green Phys. Geol. 1877); lenticular bone = the orbicular bone (Syd. Soc. Lex. 1888); † lenticular fever, a fever attended with an eruption of small red pimples (Worc. 1860 citing Dunglison); lenticular ganglion = ciliary ganglion (see ciliary); lenticular gland, (a) = lenticel 1; (b) one of the lentiform mucous follicles at the base of the tongue; lenticular instrument, knife, a scraper used in osteotomy; lenticular loop, a set of fibres that pass outward beneath the optic thalamus through the internal capsule; lenticular nucleus, the lower of the two grey nuclei of the corpus striatum; lenticular ore (see quot. 1862); lenticular process, a process on the incus of a mammal; lenticular stereoscope (see quot. 1869).
1849Murchison Siluria viii. 176 Including some *lenticular beds of conglomerates.
1793Young in Phil. Trans. LXXXIII. 174 The *lenticular ganglion. 1840G. V. Ellis Anat. 94 The ophthalmic or lenticular ganglion, a small roundish-shaped body, is redder in colour in one subject than in another.
1835Lindley Introd. Bot. (1839) 67 *Lenticular glands are brown oval spots found upon the bark of many plants.
1672Wiseman Wounds i. ix. 95 This is to be done by the *Lenticular instrument made for that purpose.
1846F. Brittan tr. Malgaigne's Man. Oper. Surg. 167 The disc of bone having been removed, and the edges levelled with a *lenticular knife.
1899Allbutt's Sys. Med. VI. 501 That degeneration of the central link of the bulbar nuclei associated with symmetrical lesions of the cortex..and in particular of the outer segment of the *lenticular nucleus.
1862Dana Man. Geol. 234 Beds of red argillaceous iron-ore, called *lenticular ore, from the small flattened grains which compose it.
1852Phil. Mag. III. 17 (heading) The *lenticular stereoscope. 1869Tyndall Notes Lect. Light 31 The instrument most used by the public is the Lenticular Stereoscope of Sir David Brewster. In it the two projections are combined by means of two half lenses with their edges turned inwards.
2. a. Of or pertaining to a lens; employing a lens or lenses.
1875Bedford Sailor's Pocket Bk. v. (ed. 2) 132 Its consumption of oil and stores..is not more than that of the lenticular light. 1903Sci. Amer. 7 Feb. 98/2 The lenses revolve at a given speed..proportioned to the diameter of the illuminant and the lenticular apparatus. 1961Listener 26 Oct. 670/1 The first lenticular light-house.
b. Of or pertaining to the (crystalline) lens of the eye.
1822–44Good's Study Med. (ed. 4) III. 166 The most frequent species of lenticular cataract is that called hard or firm. 1879St. George's Hosp. Rep. IX. 493 Tension of the left eye, in which there was commencing lenticular opacity.
3. Photogr.
a. Embossed with minute lenses, as lenticular film, a film having the non-emulsion surface formed into minute lenses (usually cylindrical lenses, giving a corrugated pattern), so that two or more images (as of different primary colours to make up a colour photograph) can be interspersed on the same area of film.
1934Photogr. Jrnl. LXXIV. 206/1 The list of patents relating to the duplicating of lenticular films grows. 1950A. W. Judge Stereoscopic Photogr. (ed. 3) xvii. 297 A more recent method of making Lenticular stereograms..employs a lenticular screen, made up of contiguous cylindrical-type lenses, of very small width, placed in front of the sensitive emulsion. 1962W. G. Hyzer Engin. & Scientific High-Speed Photogr. i. 42 A lenticular plate, comprised of an array of spherical lenslets, is employed to produce a corresponding array of spots on the photo⁓sensitive film. A primary lens having an aperture of f/6·3 is used to project the image of the event onto the front surface of the lenticular plate, whereupon each individual lenslet converges the image rays intercepted by its surface onto a tiny spot at the focal plane. Sequential images may be obtained by producing relative motion between the lenticular plate and the photographic emulsion. 1966R. J. Ross Television Film Engin. xi. 445 A method of recording on 35 mm lenticular film was at one time employed by the National Broadcasting Company. 1967Electronics 6 Mar. 79/1 (Advt.), The tube's light output is 30,000 foot lamberts, which results in a light level of 15-foot lamberts on a 3′ × 4′ lenticular screen.
b. Applied to a method of colour photography using a film with cylindrical lenticulations and filters with bands of the primary colours parallel to the lenticulations during exposure and projection.
1936R. M. Fanstone Colour Photogr. xvii. 157 (heading) Lenticular colour photography. 1942C. B. Neblette Photogr. (ed. 4) xxxii. 797 The Lenticular process is essentially a screen method in which the screen is formed optically on the emulsion during exposure. 1964E. S. Bomback Man. Colour Photogr. iii. 56 The first commercial film based on the lenticular process was marketed by Kodak in 1928 as 16 mm. cine film..called Kodacolor.
4. Comb., as lenticular-shaped.
1835Poe Adv. Hans Pfaall Wks. 1864 I. 17 The lenticular-shaped phenomenon..called the zodiacal light. 1879Cassell's Techn. Educ. IV. 63/2 Filled up with lenticular shaped blocks. 1884F. J. Britten Watch & Clockm. 191 These pendulums have generally lenticular shaped bobs.
†B. n. Obs.
a. A lenticular glass or lens.
b. = A lenticular knife (see A. 1 b).
1658tr. Porta's Nat. Magic xvii. 368 A Convex Lenticular kindleth fire most violently. 1758J. S. tr. Le Dran's Observ. Surg. (1771) 68 We..contented ourselves with removing some Asperities at the Circumference of the Fracture with the Lenticular. 1802Med. Jrnl. VIII. 484 The Lenticular is an instrument, apparently better adapted to its intent, than experience can allow to be the case.
Add:[A.] [1.] [b.] lenticular cloud Meteorol., a lens- or lentil-shaped cloud with sharp, sometimes iridescent outlines, which usually occurs in association with lee waves.
[1894W. C. Ley Cloudland iv. 49 When a patch of cloud has an approximately circular periphery, and a somewhat greater vertical thickness at or near its centre than at its edge, towards which it shelves off, being, in fact, a flat spheroid, its largest diameter lying parallel to the earth's surface, we call the cloud Lenticular. ] Ibid. 50 Rather rarely, I have seen very perfect *Lenticular clouds during a frosty afternoon in winter lying above the summits of low hills.1926W. J. Humphreys Fogs & Clouds iii. 58 The lenticular cloud..often is only the cloud cap to a stationary..air billow produced as a rule by the flow of the wind over an uneven surface. 1978A. Welch Bk. Airsports vii. 122/2 (caption) Wave systems are often characterized by smooth-edged lenticular clouds which remain almost stationary in the sky. 1985Nat. Geographic May 673/1 Wave, or lenticular, clouds.., partly created by strong winds blowing perpendicular to a mountain range.
lenticular galaxy Astron., a galaxy having the flattened shape and dense centre characteristic of spiral galaxies, but without discernable spiral arms.
1953E. E. Smith Second Stage Lensmen xvii. 231 But the Dauntless was not within any *lenticular galaxy—nowhere was there any sign of a Milky Way! 1977J. Narlikar Struct. Universe iii. 68 Apart from this there are lenticular galaxies S0, which resemble the spirals in many respects but which are very much dominated by the bulge. 1992M. J. West in S. P. Maran Astron. & Astrophysics Encycl. 95/2 The galaxy populations of rich regular clusters tend to be composed primarily of elliptical and S0 (lenticular) galaxies, with only a small fraction of spirals. |