photometry

[fo-tom´ĕ-tre]

measurement of the intensity of light.

pho·tom·e·try

(fō-tom'ĕ-trē),

The measurement of the intensity of light.

Farlex Partner Medical Dictionary © Farlex 2012

photometry

The measurement of light with a photometer. See candela per square metre; luminous flux; footcandle; footlambert; illuminance; luminous intensity; lambert; luminance; millilambert; photometer.

Table P3 Common photometric units

luminous flux

lumens

luminous intensity (I)

candela = lumens/steradian

illuminance (E)

lux = lumens/m²

footcandle = lumens/ft²

luminance (L)

candela/m²

candela/ft²

footlambert

lambert

millilambert

1 footlambert (fL) = 3.426 cd/m²

1 lambert = 3183 cd/m²

1 millilambert = 3.183 cd/m²

1 candela/m² = 0.2919 fL

1 candela/ft² = 3.142 fL

pho·tom·e·try

(fō-tom'ĕ-trē)

The measurement of the intensity of light.

Mentioned in

References in periodicals archive

Professional photometrists calibrate their instruments by photographing stars of known brightness and adding up the levels of the pixels in the star's image.

Measuring skyglow with digital cameras: these instruments are designed to take pretty pictures, but you can also do science with them

It's easy to understand why so many amateur photometrists credit Warner with being the catalyst that got them started.

A trio for minor-planet observers

Harris wanted CCD photometrists to remeasure its period to find out.

Backyard science: the International Amateur-Professional Photoelectric Photometry (IAPPP) and the amateur astronomer

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