Photonics Dictionary

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ACR

active-cavity radiometer

Angstrom mode

An operational mode for radiometers that analogs the method of operation of an angstrom pyrheliometer. In this mode, the rearward-facing cavity is electrically heated, while the forward cavity is...

Abbe refractometer; acoustic radiometer; acoustic resonance; active region; alpha ray; amplitude ratio; antireflective; aperture ratio; applied research; argon; aspect ratio; atomic reactor; augmented reality

Crookes radiometer -> radiometer

A device used to measure the intensity of radiant energy.

CTR

current transfer ratio; cloud-top radiometer

ECPR

electrically calibrated pyroelectric radiometer

ESR

electrical substitution radiometer; electron spin resonance

HRIR

high-resolution infrared radiometer

IRIS

infrared intelligent spectro-radiometer; infrared interferometer spectrometer

meter

1. The basic unit of length in the metric system, equal to 39.37 in. or 3.28 ft. 2. Any device or instrument used for measuring. The term often appears in conjunction with the quantity it measures,...

Nichols radiometer

An instrument devised by Nichols and Hull for use in the measurement of radiation pressure. The device has two small silvered, glass mirrors that are suspended, in the way of a torsion balance, by a...

radiometer

A device used to measure the intensity of radiant energy.

scanning spectroradiometer

A spectroradiometer having a means to scan different regions of the light spectrum, providing simultaneous representations of amplitude vs. wavelength of the spectrum.

solar simulator

A solar simulator is a device used to replicate the spectrum and intensity of sunlight in a controlled environment for testing and research purposes. Solar simulators are employed in various...

spectroradiometer

A spectroradiometer is a device used to measure the intensity of light at different wavelengths across the electromagnetic spectrum. It provides a detailed spectral distribution of light, breaking...

THIR

temperature-humidity infrared radiometer

total radiation pyrometer

Also known as a pyrradiometer. An instrument that is designed to measure heat radiation nonselectively; e.g., the combination of terrestrial and solar radiation.

VTPR

vertical temperature profile radiometer

Photonics Dictionary