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Radius of curvature
| Глоссарий терминов и сокращений по оптическим линзам |
A straight line measured from the center of a circle to its circumference, usually used to express the curvature of a spectacle or contact lens in millimeters, or to compute the sagitta value and dioptric power of a corneal surface.
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Curvature, английский
- The way in which something bends from a straight line greater or lesser curvature of the stomach
- Кривизна (поверхности); изгиб
- Кривизна; искривление
Curvature friction, английский
The friction resulting from bends or curves in the specified profile of posttensioned tendons.
Curvature of field, английский
Curvature of gravity, английский
Curvature of the deck, английский
Прогиб палубы
Curvature of the spine, английский
An unusual bending of the spine forwards or sideways
Radium, английский
- Radium consists of 16 isotopes, the most abundant being the radioactive radium-226. this is a metallic substance, has a half-life of 1602 years and decays via a complicated chain, eventually leading to stable lead-206. along the way it decays to radon gas
- A radioactive metallic element (note: the chemical symbol is ra.)
- A radioactive element with the atomic number 88 and an atomic weight of 226. in nature, radium is found associated with uranium, which decays to radium, by a series of alpha and beta emissions. radium is used as a radiation source.
Radium bromide, английский
Radium g, английский
Radium [ii, n] (ra), латинский
Radiumhoito, финский
Radiumin käyttö, финский
Radiumite, английский
Radius, английский
- Remote authentication dial-in user service
- Радиус
- Half the diameter of a circle. the curvature of a surface may be expressed in terms of its radius, or its radius of curvature.
- The shorter and outer of the two bones in the forearm between the elbow and the wrist. see illustration at hand in supplement (note: the plural is radii. the other bone in the forearm is the ulna.)
- The semi-diameter of a circle, limb of a sextant, &c.
- Служба удаленной аутентификации пользователей по телефонным линиям
- A proposed internet protocol in which an authentication server provides authorization and authentication information to a network server to which a user is attempting to link.
Radius, латинский
Radius (ii), английский
Radius (range) of drawdown cone, английский
Radius arm, английский
See radius rod.
Radius brick, английский
Radius cutter, английский
Also known as corner round router bits.
Radius diffusion, английский
The horizontal axial distance an airstream travels after leaving an air outlet before the maximum stream velocity is reduced to a specified terminal value.
Circumference, английский
- Окружность; периметр
- Окружность; периметр c1rm celestial infrared measurement (program) программа измерений ик-излучений звезд
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Range of accommodation, английский
The linear distance from the farthest point of clear vision to the nearest point of focus or clear vision attainable by the human eye; usually expressed in centimeters or inches from far point to near point.
Quantity of vision, английский
The eye’s ability to adjust to environmental and focal differences, which relates to blurred vision. r radial keratotomy (rk) – a surgical procedure used to reduce nearsightedness. during surgery, eight to sixteen cuts are made in the cornea to flatten it thus focusing light back toward the retina. risk of surgery include over or under correction, fluctuating vision, sensitivity to glare and seeing difficulty during night viewing. surgical scars on the cornea sometimes make it difficult for some patients to wear contact lenses.
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