| 单词 | optic angle |
| 释义 | > as lemmasoptic angle optic angle n. †(a) the angle formed at the eye by the extremities of an object viewed; the visual angle (obsolete); (b) the angle between the optic axes of the eyes when directed to the same object; (c) the angle between the optic axes of a biaxial doubly refracting crystal. ΘΚΠ the world > physical sensation > sight and vision > [noun] > visual angle optic angle1709 visual angle1710 1709 G. Berkeley Ess. New Theory of Vision §15. 8 Tho' we should grant the real Existence of those Optic Angles. ?1790 J. Imison School of Arts (ed. 2) 210 Easy to apprehend, by any person who understands the nature of the optic angle. 1881 Science 24 Dec. 611/2 For distances of more than 240 m. the optic angle becomes inappreciable. 1890 Cent. Dict. at Optic Optic angle,..(c) The angle between the optic axes in a biaxial crystal. 1922 N. H. Winchell & A. N. Winchell Elem. Optical Mineral. (ed. 2) I. xvi. 159 The acute angle between the optic axes is called the optic angle. 1970 Science 30 Jan. 666/3 Optic-angle-measurements suggest that the disorientations generally are not related to changes in chemical composition. < as lemmas |
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