| 单词 | crown lens |
| 例句 | But girl, look how good you look in that flower crown lens! Snow is a Snapchat clone for next-level selfies 2016-07-18T04:00:00Z What Hall and Dollond did was to make the outer or crown lens of the objective as before, and place behind it a plano-concave lens of dense flint glass. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z It will be seen that the flint glass component by itself is a concave lens and therefore neutralises in part, or in whole, the convex crown lens. Optical Projection Part 1: Projection of Lantern Slides Fitted with a reversible crown lens for photography. A Popular History of Astronomy During the Nineteenth Century Fourth Edition This had the effect of neutralizing the chromatic effect, or color aberration, while at the same time only part of the refractive effect of the crown lens was destroyed. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z |
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