photometric
Gauging brightness levels
Photometric relates to the measurement of light, specifically its intensity as perceived by the human eye.
The term appears in technical contexts involving illumination, astronomy, and optical instruments: photometric analysis, photometric data.
Photometry measures visible light weighted by human visual sensitivity, distinguishing it from radiometric measurements that cover the full electromagnetic spectrum.
Light per unit area
- illuminanceReceived light intensity
- irradianceIncident power per area
- fluxContinuous change or flow
- intensityStrength or force level
candela · lumen · lux · spectrophotometry · photodiode · sensor · detector · calibration
Light-focusing curved glass
- filterPorous separation device
- apertureAdjustable optical inlet
- transmissionSending of information
- absorptionProcess of taking in
refraction · spectrum · wavelength · spectral · bandwidth · photon · visible · infrared
Intrinsic brightness of source
- radianceGlowing luminous quality
- brillianceExceptional intelligence or luster
- intensityStrength or force level
- glowSteady, soft light
illumination · magnitude · apparent · absolute · stellar · emission · incandescence · luminescence
luminance
Light per unit area
- illuminanceReceived light intensity
- irradianceIncident power per area
- fluxContinuous change or flow
intensity · candela · lumen · lux · spectrophotometry · photodiode · sensor · detector · calibration · standardization
lens
Light-focusing curved glass
- filterPorous separation device
- apertureAdjustable optical inlet
- transmissionSending of information
absorption · refraction · spectrum · wavelength · spectral · bandwidth · photon · visible · infrared · ultraviolet
luminosity
Intrinsic brightness of source
- radianceGlowing luminous quality
- brillianceExceptional intelligence or luster
- intensityStrength or force level
glow · illumination · magnitude · apparent · absolute · stellar · emission · incandescence · luminescence · fluorescence
photometricqualitative
Relating to characteristics, not quantities
observational · subjective · descriptive · unmeasured · impressionistic