| 单词 | optic axis |
| 释义 | > as lemmasoptic axis optic axis n. (a) = optical axis n. (a) at optical adj. and n. Compounds; (b) Crystallography and Mineralogy the direction in which the ordinary and the extraordinary rays passing through a doubly refracting crystal behave alike, so that there is no double refraction. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > instruments to refract, etc., light > [noun] > optic axis optic axis1664 the world > life > the body > sense organ > sight organ > parts of sight organ > [noun] > axis optical axis1663 optic axis1664 1664 H. Power Exper. Philos. i. 80 Take a fresh Eye..cut it with a plain Parallel to the Optick Axis. 1723 J. Clarke tr. Rohault's Syst. Nat. Philos. I. i. xxxi. 247 We turn our Eyes to it in such a manner, that the two Optick Axes meet at the Point which we fix our Attention principally upon. 1825 Lancet 12 Nov. 246/2 The optic, or visual axis, is a straight line drawn through the centre of the cornea, pupil, lens, and vitreous humour. 1889 G. M. Hopkins Exper. Sci. xii. 258 The angle between the optic axes in some crystals is so small as to permit of seeing them readily. 1992 S. P. Maran Astron. & Astrophysics Encycl. 195/1 A Lyot element is field widened by dividing the crystal in half in the optic axis direction. < as lemmas |
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