Optics. The point (or either of the points: see note) on the focal axis of a curved mirror, lens, or lens system at which rays initially parallel to…
| 单词 | θ64923 |
| 释义 | the world > physical sensation > sight and vision > optical instruments > lens > [noun] > focal length or point (7) focus1664 Optics. The point (or either of the points: see note) on the focal axis of a curved mirror, lens, or lens system at which rays initially parallel to… focus1666 Optics. = focal length n. at focal, adj. compounds. focal distance1684 Optics. The distance from a lens, lens system, or curved mirror to its focus along its focal axis; = focal length n. at focal, adj. compounds. focal point1692 Optics. The point (or either of the points: see note) on the focal axis of a curved mirror, lens, or lens system at which rays initially parallel to… burning-point1698 the focus of a lens (obsolete). short focusa1830 a focal point that is near to the lens; chiefly attributive, esp. in short-focus lens, spec., a photographic lens whose focal length is less than the… visual focus1837 |
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