| 词汇 | example_english_focal-length |
| 释义 | Examples of focal lengthThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. The aperture and focallength on the camera are set according to need. The procedure was applied to the 3 m focallength off-axis parabola. The focallength of the evolved system is 0.992298 and the sum of the distances is 0.09881 ($1/10). Therefore, the focallength becomes the key condition of the threshold producing the plasma in the condition of identical incident energies. The principle of choosing a focallength is to reduce the effects of the closure as weak as possible. The pixel pitch and the focallength of the cameras are 0.0185 and 2.5 mm, respectively. The focallength is longer for a low-intensity front. It may be necessary to set a larger focallength because of obstructions in the robot's path. Such an individual receives a large numerical penalty equal to 500,000 plus 500,000 times the distance by which the back focallength is offset. This is to be expected as it is known to be associated with the focallength of the laser. It is obvious that the shorter the focallength is and the stronger the intensity at the focus will be. The laser beam is focused by a 25-cm focallength silver mirror through a 0.5-mm-thick fused-silica window into the laser-gas interaction chamber. Three images are taken at the same positions as above, and for the same focallength and beam diameter. The injected beam radius is 3 cm for the 3-m focallength and 6 cm for the 6-m focallength. This potential does not degrade significantly as the focallength increases. The focallength of the camera was typically 75 mm, producing an angular resolution of about 1 arc min per pixel. Focallength was typically set to 75 mm and aperture to f016 or f022 to achieve a large depth of focus. Once the focallength and aperture have been set, they will typically not be changed. A small focallength allows a close-up view of a small object for measurements requiring a finer tolerance. A large focallength also gives a larger viewing area on the display monitor. The laser beam was focused to a spot of 12 mm in diameter with the f 0 2 off-axis parabola with a 75-mm focallength. A spark source was used in conjunction with one of the 12 in. diameter, 71.5 in. focallength parabolic schlieren mirrors to produce a parallel beam for direct shadowgraphs. We concluded that spectacles with adaptable focallength could improve the eyesight and productivity of million of poor people. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 That in turn means new cameras with twice the focallength and able to take twice as many pictures in the same time. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 We have had a great deal of talk about measurement of the focallength of the eyes, and so on and so forth. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Indeed, we are beginning to do so in this very debate—that is, if we can find the long-unused focallength. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The long focallength was achieved by using a two-mirror reflection system. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. With short focallength instruments a mirror diagonal is preferred over a prism. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Adjustable focus eyeglasses have one focallength, but it is variable without having to change where one is looking. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When calculating the effective focallength, it is important to take into account the image format a camera uses. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. If the focallength is in metres, this gives the optical power in dioptres (inverse metres). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The satellite had a mass of, and was equipped with a panoramic camera with a focallength of, which had a maximum resolution of. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The curvature of field is determined by the sum of the dioptres, but the focallength is not. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Sextupolar fields have a focallength that is inversely proportional to the distance from the center of the magnet with which the particle passes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Changing the focallength only while keeping the same camera position doesn't affect perspective but the camera angle of view only. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The focallength is positive for a concave mirror, and negative for a convex mirror. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Both the hemi and zone beams used an antenna reflector 3.2m ftin in diameter with a 4.2m ftin focallength. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The observatory's main feature was a refracting telescope with 1800mm focallength. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It had a mass of, and was equipped with a panoramic camera with a focallength of, which had a maximum resolution of. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The field of view has a 35 mm equivalent focallength of 24136mm. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Very high resolution monochromators might have a focallength of 2 meters. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, it may not always be visible, except at the widest end (the shortest focallength). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Note that computing the focallength requires that the light-refracting properties of the liquids in the eye are taken into account. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When the focallength is positive the image's height, distance and magnification are "real" and positive. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This is because angle of view is a function of both focallength and the sensor or film size used. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The focallength is 3.57 mm with a focal ratio of 4.6. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The onboard camera had a focallength of 76 mm. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The combination of focallength, subject distance, and format size defines magnification at the film / sensor plane. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The satellite had a mass of, and was equipped with a frame camera with a focallength of, which had a maximum resolution of. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Making a mirror with a focallength of five metres, for example, requires a rotation speed less than ten revolutions per minute. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The objective diameter of the telescope is 6.5 inches and it has a focallength of f/13.5. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It has a 70 cm diameter primary mirror and a focallength of 46 m. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Magnification increases, therefore, when the focallength of the eyepiece is shorter or the focallength of the objective is longer. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the more general case, the distance to the foci is the focallength multiplied by the index of refraction of the medium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. At its simplest, it is a very high-powered magnifying glass, with very short focallength. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the long focallength limit, the area of each zone is equal, because the width of the zones must decrease farther from the center. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Back-up provided by a 190mm focallength still camera. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As the focallength increases, the area the laser can detect increases as well, displaying a proportional relationship. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Each radar range yields a zone plate strip with a focallength proportional to that range. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the non-compact, the corrector plate remains at or near the center of curvature (twice the focallength) of the primary mirror. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Another common reason to employ dual-speed focuser is the use of low focallength eyepieces, where the focus depth is short, requiring accurate focusing. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Most early zooms had separate twist control rings to vary the focus and focallength a two touch zoom. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The objective focallength of the telescope is 4000 mm. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Each mirror was angled to the anticipated focallength to the central tower. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is equal to the reciprocal of the focallength of the device:. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The scale need not be present in every image of an individual tree so long as the focallength has not been changed between images. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. City patrol needs shorter range, lower focallength cameras for capturing plates on parked cars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Parking lots with perpendicularly parked cars often require a specialized camera with a very short focallength. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For small distance between the foreground or background detail, the effect of focallength is small; for large distance, the effect can be significant. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These parameters encompass focallength, image format, and principal point. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The density of the liquid, for example, has no effect on the focallength of the paraboloid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The focallength of the camera is also set. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. But these systems all involved some arbitrary constant, as opposed to the simple ratio of focallength and diameter. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He also has enhanced muscles around his eyes, increasing his ability for orb distortion which changes focallength. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It has a 4 clear-inch (105mm) diameter f/4.2 aluminized and overcoated borosilicate glass parabolic primary mirror with a focallength of 17 inches (445mm). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A diopter is the reciprocal of the focallength in meters. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In order to make it easier to compare lenscamera pairs, it is common to talk about their 35 mm equivalent focallength. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Depth of field depends on the focallength, aperture, and subject distance. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It has a 35mm equivalent focallength of 15mm-26mm. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Long focallength versions exceed 0.5kg lb, which is enough to unbalance small telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The upper limit of focallength with 2 inch eyepieces is about 55 mm. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For example, a 25 mm eyepiece in a telescope with a 1200 mm focallength would magnify objects 48 times. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The aperture was 29 mm with a focallength of 96 mm. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is designed for portrait use with a 35mm equivalent focallength of 82.5mm. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The focallength is 40 ft (12.2 m). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The radius of curvature at the origin, which is the vertex of the parabola, is twice the focallength. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It was equipped with a frame camera with a focallength of, which had a maximum resolution of. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This effect can be advantageous for telephoto and macro photography as it produces a tighter crop without the need to increase actual focallength. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Depending on the crystal and the focallength of the imaging optics, the resolution of this type of spectrometer can be varied. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. By carefully measuring the position where the objects were extinguished and knowing the focallength of the eyepiece, the angular distance could be calculated. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For concave mirrors, whether the image is virtual or real depends on how large the object distance is compared to the focallength. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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