| 单词 | negative eyepiece |
| 释义 | > as lemmasnegative eyepiece negative eyepiece n. Optics an eyepiece consisting of two planoconvex lenses with their plane side towards the observer, so named because the image is formed between the two lenses; cf. Huyghenian eyepiece n. at Huyghenian adj. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > lens > [noun] > eye-piece eyeglass1665 ocular1702 eyepiece1729 Ramsden1787 field glass1797 negative eyepiece1831 positive eyepiece1842 Kellner1865 orthoscopic1868 eye-point1875 comparison eyepiece1940 1831 D. Brewster Treat. Optics xliii. 361 This eyepiece is called the negative eyepiece. 1875 E. H. Knight Amer. Mech. Dict. II. 1521/1 The Huyghenian, or negative eye-piece..is the usual combination of lenses at the eye-end of a telescope or microscope. 1978 Amer. Jrnl. Bot. 65 1065 (note) The distal and proximal radii were measured on photographs taken with a ×90 objective and ×8 negative eyepiece. < as lemmas |
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