focal distance - tradução para russo
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focal distance - tradução para russo

MEASURE OF HOW STRONGLY AN OPTICAL SYSTEM CONVERGES OR DIVERGES LIGHT
Focal distance; Effective focal length; Front focal length; Back focal length; Rear focal length; Front focal distance; Rear focal distance; Back focal distance; Focal Length; Focus length; Focal Legnth; Focal length (photography); Lens focal length
  • In this computer simulation, adjusting the field of view (by changing the focal length) while keeping the subject in frame (by changing accordingly the position of the camera) results in vastly differing images. At focal lengths approaching infinity (0 degrees of field of view), the light rays are nearly parallel to each other, resulting in the subject looking "flattened". At small focal lengths (bigger field of view), the subject appears "foreshortened".
  • The focal point '''F''' and focal length ''f'' of a positive (convex) lens, a negative (concave) lens, a concave mirror, and a convex mirror.
  • Thick lens diagram
  • 2}}) has a double-size, virtual and upright image.
  • Sketch of human eye showing rear focal length f' and EFL

focal distance         

медицина

фокусное расстояние

focal distance         
фокусное расстояние (объектива)
focal distance         
фокусное расстояние

Definição

focal length
¦ noun the distance between the centre of a lens or curved mirror and its focus.
?the equivalent distance in a compound lens or telescope.

Wikipédia

Focal length

The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light. A system with a shorter focal length bends the rays more sharply, bringing them to a focus in a shorter distance or diverging them more quickly. For the special case of a thin lens in air, a positive focal length is the distance over which initially collimated (parallel) rays are brought to a focus, or alternatively a negative focal length indicates how far in front of the lens a point source must be located to form a collimated beam. For more general optical systems, the focal length has no intuitive meaning; it is simply the inverse of the system's optical power.

In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with lower magnification and a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.

Como se diz focal distance em Russo? Tradução de &#39focal distance&#39 em Russo