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Numerical aperture (na)
| Fiber Optic Glossary |
- A measure of the angular acceptance for a fiber, approximately the sine of the half-angle of the acceptance cone. the na of an optical fiber defines a characteristic of the fiber in terms of its acceptance of incoming light
- The sine of half the angle over which a fiber can accept light. strictly speaking, this is multiplied by the refractive index of the medium containing the light, but for air the index is almost equal to 1. the light-gathering ability of a fiber; the maximum angle to the fiber axis at which light will be accepted and propagated through the fiber. na = sin a, where a is the acceptance angle. na also describes the angular spread of light from a central axis, as in exiting a fiber, emitting from a source, or entering a detector.
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Abertura mecánica, испанский
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Acceptance, английский
- Акцепт:
- Приёмка (работ, материалов) ~ of work приёмка (выполненных) работ
- Contractual agreement instigated when the drawee of a time draft "accepts" the draft by writing the word "accepted" thereon. the drawee assumes responsibility as the acceptor and for payment at maturity. see: letter of credit and banker`s acceptance.
- Акцепт
- An offeree’s consent to enter into a contract and be bound by the terms of the offer.
- In uk railway signalling terms, `acceptance` means the permission given by a signalman for a train to enter the section of line he controls.
Approximately, английский
- Approx.
- Приблизительно
- Приблизительно, около
Characteristic, английский
- Property that helps to distinguish between items of a given population (3)
- A quality which allows something to be recognised as different cancer destroys the cell’s characteristics. adjective being a typical or distinguishing quality symptoms characteristic of anaemia the inflammation is characteristic of shingles.
- N характеристика (см. тж. portrayal) articulatory ~ артикуляторная характеристика perceptual ~ перцептивная характеристика, характеристика восприятия
- Характерная особенность, признак; характеристика, особенность ~s of the loading особенности [параметры] нагружение (конструкции)
- The characteristic dimension dc
Refractive, английский
Containing, английский
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Core concentricity, английский
A measure of the relationship between the geometric center of the core of an optical fiber and the geometric center of the cladding, or how centered the core is
Dopant, английский
- A material, usually germanium or boron oxide, added to silica to change its index of refraction
- An impurity added to an optical medium to change its optical properties. edfas use erbium as a dopant for optical fiber.
- A chemical element (impurity) added in small amounts to an otherwise pure semiconductor material to modify the electrical properties of the material. an n-dopant introduces more electrons. a p-dopant creates electron vacancies (holes).
- A chemical element (impurity) added in small amounts to an otherwise pure
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