|Глосссарий терминов и сокращений по оптическим линзам|
A type of glass containing lead for increasing the index together with barium to increase refractive index, while maintaining a relatively low dispersion.
Geoscience laser altimeter system; geologisches landesamt des saarlandes
Glas (orthodox motet tone), английский
Glas- und keramikadditive, pl, немецкий
Geologisches landesamt schleswig-holstein
Glas; voce, румынский
The gaelic name of an edible sea-weed of our northern isles.
Glasfaserverstärkter kunststoff (m.) (gfk)/ glasfaserkunstharz (m.), немецкий
Г. глазго (адм. центр обл. стратклайд, шотландия, великобритания)
Glasgow coma scale, английский
A seven-point scale for evaluating someone’s level of consciousness
- Стекло; стеклянный
- Стекло -
- A marine barometer. (older barometers used mercury-filled glass tubes to measure and indicate barometric pressure.)
- Lens, as is “what glass do you own?”
- A hard, brittle, amorphous substance made from heat-fused silicates with soda or potash, lime, metallic oxides, and similar elements of transparent quality used to manufacture an ophthalmic lens.
- Two or more plies of plate , float glass, or sheet glass, bonded to a transparent plastic sheet between them to form a shatterresisting assembly.
- Глобальная морская система связи при бедствии и для обеспечения безопасности, гмссб
- The usual appellation for a telescope (see the old sea song of lord howard`s capture of barton the pirate). also, the familiar term for a barometer. glass is also used in the plural to denote time-glass on the duration of any action; as, they fought yard-arm and yard-arm three glasses, i.e. three half-hours.—to flog or sweat the half-hour glass. to turn the sand-glass before the sand has quite run out, and thus gaining a few minutes in each half-hour, make the watch too short.—half-minute and quarter-minute glasses, used to ascertain the rate of the ship`s velocity measured by the log; they should be occasionally compared with a good stop watch.— night-glass. a telescope adapted for viewing objects at night.
-  a telescope. often an important symbol of office; also “long-glass.”  a barometer.  formerly the half-hour glass used to tell time aboard ship, and hence  a thirty-minute period of time.
Glass beads, английский
Small balls of glass used in a frame warmer to provide an even, constant heat to the frame.
Glass blank, английский
The pure, solid glass mass formed after sintering an oxide preform. this glass blank undergoes a drawing process to become optical fiber
- Увеличение ширины импульса сигнала при его распространении по оптоволокну. основной фактор, ограничивающий полосу пропускания многомодового оптоволокна.
- Эффект расширения световых импульсов во время их передачи по оптическому волокну. дисперсия пропорциональна длине кабеля (см. также хроматическая дисперсия).
- Refers to the spread of values observed for a variable. the standard deviation is a measure of dispersion, in contrast to the mean which is a measure of central tendency or location.
- The cause of bandwidth limitations in fiber. in multimode systems, modal dispersion is caused by differential optical path lengths known as differential path delay. for singlemode systems, chromatic dispersion is a combination of material dispersion (caused by the line width of the laser source) and waveguide dispersion (caused by the difference in the speed of light in the core and the cladding of the fiber). another type of dispersion is polarization mode dispersion (pmd), which is caused by random vibration, temperature variations, and bending of the fibers known as birefringence
- (1) the variation in the refractive index of a medium as a function of wavelength. (2) the property of an optical system which causes the separation of the monochromatic components of radiation.
- The dependence of the phase velocity in a medium on the optical frequency or the propagation mode
- The stretching of light pulses as they travel in an optical fiber, which increases their duration. the temporal spreading of a light signal in an optical waveguide caused by light signals traveling at different speeds through a fiber either due to modal or chromatic effects.
- This occurs when white light is split into separate wave lengths and component colors.
- Модовая дисперсия dispersion-compensating fiber волокно с компенсацией дисперсии
|Base curve, английский|
The singular dioptric curve on the front surface of a lens. this curve is generally in place when the lens blank is manufactured and as such will control the selection of back curves necessary to produce a given prescription. this surface curve becomes the basis from which the other remaining curves are measured. when applied to lenses in general, the base curve is the group curve or the curve common to a group of lens powers. base down (bd) prism – a wedged shaped lens which is thicker at the bottom of the lens. prisms bend light in the opposite direction from its thicker edge so base down prism turns the light upward thus causing the eye to also move upward. this prism is used to measure an eye alignment and /or treat a binocular dysfunction (eye teaming problem). prisms are sometimes added to glasses to help improve eyesight due to a misalignment or visual field loss. base in (bi) prism – a wedged shaped lens which is thicker at the nasal area of the lens. prisms bend light in the opposite direction from its thicker edge so base in prism turns the light outward (toward the ear) thus causing the eye to also move outward. this prism is used to measure an eye alignment and /or treat a binocular dysfunction (eye teaming problem). prisms are sometimes added to glasses to help improve eyesight due to a misalignment or visual field loss. base out (bo) prism – a wedged shape lens which is thicker on the outward edge of the lens, closest to the ear. prisms bend light in the opposite direction from its thicker edge so base out prism turns the light inward thus causing the eye to also move inward. this prism is used to measure an eye alignment and /or treat a binocular dysfunction (eye teaming problem). prisms are sometimes added to glasses to help improve eyesight due to a misalignment or visual field loss. base up (bu) prism – a wedged shape lens which is thicker on the upward edge of the lens. prisms bend light in the opposite direction from its thicker edge so base up prism turns the light downward thus causing the eye to also move downward. this prism is used to measure an eye alignment and /or treat a binocular dysfunction (eye teaming problem). prisms are sometimes added to glasses to help improve eyesight due to a misalignment or visual field loss.
Barium glass, английский
Commonly used for a type of crown glass, one of the ingredients is barium oxide added for the purpose of increasing refractive index, while maintaining relatively low dispersion. barrel - (bbl) – (1) the component of a hinge that interlocks with the mating component of the hinge set, (2) a threaded closure device attached to a metal eyewire.