| 单词 | focal distance |
| 例句 | To a very good approximation, this mirror has a well-defined focal point at F that is the focal distance f from the center of the mirror. College Physics for AP Courses 2015-08-12T00:00:00Z Returnal’s photo mode also offers more advanced options, the ability to adjust things like focal distance, aperture, saturation, and contrast of your shot, swapping out different light sources, and, of course, different filters. Returnal finally adds a ‘suspend’ feature to let you pause the game mid-run 2021-10-26T04:00:00Z Selfie mode adjusts the focal distance of the camera to allow subjects closer to the lens to be in focus. Fujifilm’s new Instax Mini 40 is a $100 vintage-looking toy 2021-04-07T04:00:00Z The fly is permanently fuzzy because it is inside the focal distance of the camera. Opinion | Readers critique The Post: Instead of ‘euthanizing’ pigs, let’s work to give them a better life 2020-05-08T04:00:00Z The digital replicas were produced using focus variation microscopy, a technique that uses images taken at different focal distances using a microscope to create a 3-D rendering. Microscopy imaging techniques render in 3-D the infamous bullet in JFK assassination 2019-12-13T05:00:00Z Parallel rays of light reflected from the mirror seem to originate from the point F at the focal distance f behind the mirror. College Physics for AP Courses 2015-08-12T00:00:00Z Take another piece of paper, and when the white spot is at its smallest, measure the distance between the lens and the paper, and you will have the focal distance of the lens. Through a Microscope Something of the Science Together with many Curious Observations Indoor and Out and Directions for a Home-made Microscope. 2011-12-29T03:00:20.733Z One of the "first order" has a focal distance of 920 millimetres. Marvels of Scientific Invention An Interesting Account in Non-technical Language of the Invention of Guns, Torpedoes, Submarine Mines, Up-to-date Smelting, Freezing, Colour Photography, and many other recent Discoveries of Science 2011-11-19T03:00:24.517Z The faculty which the eye possesses of accommodating its focal distance to objects placed at different distances. The Legendary and Poetical Remains of John Roby author of 'Traditions of Lancashire', with a sketch of his literary life and character 2011-11-07T02:00:18.317Z The photographic objective of 64 mm focal distance, is best adapted to this purpose. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z The principal focal distance of concave lenses is found by exactly the same rule as that given for convex lenses. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 It is the old story of the seers and the prophets repeated as many times as they appear; for "these colossal souls," as Emerson said, "require a long focal distance to be seen." Library of the World's Best Literature, Ancient and Modern, Vol. 15 The focal distance of the curve is four inches. Smeaton and Lighthouses A Popular Biography, with an Historical Introduction and Sequel Immortal man is the eternal idea of Truth, that cannot lapse into a mortal belief or error concerning himself and his origin: he cannot get out of the focal distance of infinity. Miscellaneous Writings, 1883-1896 The following Objectives of 24, 35, 42 and 64 mm focal distance respectively may be used in connection with this apparatus for photographic purposes. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z It is hoped that any reader who practises photography will now understand why it is necessary to rack his camera out beyond the ordinary focal distance when taking objects at close quarters. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use This is well illustrated by the camera obscura, where if you hold the paper nearer or more remote than the focal distance of the lens, the picture will be indistinct. Popular Lectures on Zoonomia Or The Laws of Animal Life, in Health and Disease Use the 1/6-inch objective, rack down the body tube until the front lens of the objective is almost in contact with the cover-slip—that is, well within its focal distance. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. And it is only from a proper focal distance that we can see what things really are. The Heart of Nature or, The Quest for Natural Beauty The special-projection lens of 300 mm focal distance is to be used. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z If O be brought nearer than the focal distance, the rays would diverge after passing through the lens. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use The normal at any point of an ellipse bisects the angle between the focal distances of that point. The Romance of Mathematics Being the Original Researches of a Lady Professor of Girtham College in Polemical Science, with some Account of the Social Properties of a Conic; Equations to Brain Waves; Social Forces; and the Laws of Political Motion. The little sharply lighted and heated point to which the light-rays can be brought is the focus of the lens, and the distance it lies behind the lens is called the focal distance. A Handbook of Health The series of forty landscapes alluded to in the above digression, if viewed at the focal distance of eighteen inches, will appear as large as those twice the size, viewed at their proportionate increased distance. The Knickerbocker, or New-York Monthly Magazine, February 1844 Volume 23, Number 2 The objective, consisting of two separable doublets, permits three degrees of magnification of 5, 9 and 48 cm focal distance respectively. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z If the object approaches within the principal focal distance of the lens, no image will be cast by the lens. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use Other telescopes of seven, of eight, of ten, and even of twenty feet focal distance, crown his efforts. Biographies of Distinguished Scientific Men The thicker the lens, or burning-glass, is in the middle, the shorter its focal distance, and the more strongly it will magnify. A Handbook of Health You will find yourself losing the knowledge and the operation of sin, proportionably as you realize the divine infinitude and believe that He can see nothing outside of His own focal distance. Unity of Good It had a focal distance of fifty-three feet, and an aperture of six feet. Notable Events of the Nineteenth Century Great Deeds of Men and Nations and the Progress of the World This angle is given by the ratio of the maximum dimension of the image to the focal distance of the lens. The Brain, A Decoded Enigma I will tell you more of the book when I have once got it at focal distance,—if that can ever be, and muster my objections when I am sure of their ground. The Correspondence of Thomas Carlyle and Ralph Waldo Emerson, 1834-1872, Vol. I Of what use is genius, if the organ is too convex or too concave and cannot find a focal distance within the actual horizon of human life? Essays — Second Series |
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