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Trioptics GmbH - Worldwide Benchmark 4-24 LB
Photometric Dictionary Terms

photometric
Pertaining to the measurement of the intensity of light.
photometric equipment
Photocells of various kinds used to measure photometric quantities; i.e., intensity, luminance and illuminance. Meter...
stellar photometry
The utilization of photometric measurement to determine the relative magnitudes of the heavenly bodies.
Lummer-Brodhun cube
A photometric instrument having two prisms clamped in optical contact to produce a photometric field with an acute dividing...
reagent
A reagent is a substance or compound that is used in a chemical reaction to bring about a specific transformation or to...
cascade method
A heterochromatic photometric process using successive comparison of similar chromaticities and the calculation of relative...
spectrophotometric analysis
The detection and measurement of spectral reflectance, spectral transmittance or relative spectral emittance, relative to...
photographic photometry
A form of photometric measurement, often used with light sources that are transparent or fluctuating, in which a...
photometric sphere
 slit-width error
The error inherent in spectral energy or spectrophotometric quantity due to the finite dimension of the entrance and exit...
photoelectric photometry
The use of photoelectric sensors to detect and measure the intensity of a light source. This application, as compared to...
multianode microchannel array detector
A photon-counting instrument for use in both space-borne and ground-based photometric and spectroscopic instrumentation....
illuminometer
A photometric instrument used to measure the illumination falling on a surface. It may be photoelectric or visual.
opposition effect
Also referred to as the opposition surge, the opposition effect is a photometric phenomenon in which a rough retroreflective...
photometric filter
 enzyme-linked immunosorbent assay
An enzyme-linked immunosorbent assay (ELISA) is a laboratory technique used to detect and measure the presence of specific...
photometry
Photometry is the branch of science that deals with the measurement of light, particularly in terms of its intensity and the...
goniophotometric curve
The graphed curve illustrating the directional reflectance of a sample for different angles of collection.
photometric cube
A prism used in a photometer for the adjacent comparison of separate luminance.
spectrogrammetric reading equipment
Spectra can be conveniently recorded on photographic film or plates. The portions that are occupied by regions of the...

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