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Surface-emitting diode (sled)
| Fiber Optic Glossary |
An led that emits light from its flat surface rather than its side. simple and inexpensive, with emission spread of a wide angle.
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Gap loss attenuator, английский
An optical attenuator that exploits the principle of gap loss to reduce the optical power level when inserted in-line in the fiber path. e.g., to prevent saturation of the receiver.
Radiometer, английский
- An instrument, distinct from a photometer, to measure power (watts) of electromagnetic radiation.
- An instrument designed to measure the intensity of radiant energy.
- Device used to measure irradiance or radiant energy of specified frequencies. different radiometers exist for different frequencies. in nondestructive testing, radiometers are used to measure uv-a output, or leaked visible light, in microwatt per square centimeter (?w/cm2). see also irradiance. compare photometer.
- Device used to measure irradiance. in nondestructive testing, radiometers are used to measure uv-a output, or leaked visible light, in microwatt per square centimeter (?w·cm–2). see also irradiance. compare photometer.
- Device used to measure irradiance. in nondestructive testing, radiometers are used to measure uv-a output or visible light in si units of watts per square meter (w/m). used in fluorescent penetrant and magnetic particle testing to measure output of excitation sources. see also irradiance. compare photometer.
- Device used to measure irradiance. in nondestructive testing, radiometers are used to measure uv-a output, or leaked visible light, in microwatt per square centimeter (?w·cm–2).
- Irradiance. compare photometer. 386 magnetic testing
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