| 单词 | visual ray |
| 释义 | > as lemmasvisual ray b. A line of sight. Chiefly in visual ray (see visual adj. 1c).principal ray: see the first element. ΘΚΠ the world > physical sensation > sight and vision > [noun] > line of sight line of sight1559 visual line?a1560 ray1625 eyeline1664 line of collimation1687 sight-line1859 1625 N. Carpenter Geogr. Delineated i. vi. 154 The visuall Ray wherein the sight is carried, is alwaies a right line. 1700 Moxon's Math. made Easie (ed. 3) 177 The Visual Point..is a Point in the Horizontal Line, wherein all the Ocular Rays unite. 1723 J. Hodgson Syst. Math. I. 538 The infinite Ray EPap which flows from the Eye at E thro P the Pole of the Circle..must fall in the middle point p. 1753 W. Hogarth Anal. Beauty v. 25 A ray may be supposed to be drawn from the center of the eye to the letter it looks at first. 1842 J. Gwilt Encycl. Archit. ii. iv. 644 The visual rays..upon every object may be compared to the legs of a pair of compasses. 1989 K. Barratt Logic & Design (BNC) (rev. ed.) A circle may be considered as an ellipse that is seen full frontal, at right angles to the central visual ray of the eye. 1997 D. Park Fire within Eye ii. 35 The oldest theory [of vision]..was proposed by Empedocles... The eye projects forward a narrow visual ray that somehow feels the object's radiation and returns through the pupil. visual ray visual ray n. a ray proceeding from the eye to the object seen (cf. visual beam above), or in later use from the object to the eye.extracted from visualadj.n.< as lemmas |
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