crown lens


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crown lens

n.
The crown-glass element in an achromatic lens.

crown lens

n
(General Physics) a lens made of optical crown, esp the optical-crown part of a compound achromatic lens
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Noun1.crown lens - a lens made of optical crown glass
lens, lens system, lense - a transparent optical device used to converge or diverge transmitted light and to form images
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The B11 candles feature an innovative crown lens that creates a unique sparkling effect, making them ideal for use in chandelier, sconce and uplighting applications.
MAGEE ALL-SPHERICAL NEWTONIAN REFLECTOR (All dimensions are in inches) Component Diam- Radius of Following eter curvature thickness Primary mirror 6.0 -72.00 ([R.sub.1]) 30.42 Flint lens 1.0 7.11 ([R.sub.2]) 0.10 (SF-12 glass) 4.05 ([R.sub.3]) 0.00 Crown lens 1.0 4.05 ([R.sub.4]) 0.10 (BK-7 glass) flat ([R.sub.5]) 0.00 Prism 1.0 flat ([R.sub.6]) 1.00 (BK-7 glass) flat ([R.sub.7]) 7.54 Equivalent focal length: 53.7 inches Radii of curvature are positive if convex to the sky, negative if concave.