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LED 광 측정 단위
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단위정의(Lumen, W) 1 watt at 555 nm = 683.0 lumens
전광선속(lumen) : 전공간(4p)으로 퍼져나가는 광선속 복사속(W) : 복사출력(radiant power) 복사의 형태로 방출, 전달, 입사된 빛의 단위 시간당의 에너지 1 watt at 555 nm = lumens RADIANT FLUX: 1 W (watt) = lm at 555 nm = scotopic lm at 507 nm 1 J (joule) = 1 W*s (watt * second) = 10 7 erg = gram * calories LUMINOUS FLUX: 1 lm (lumen) = x W at 555 nm = 1/(4p) candela (only if isotropic)
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단위정의(cd, W/sr) 광도(cd) : 단위 입체각으로 복사하는 광선속(lm/sr) RADIANT INTENSITY:
1 W/sr (watts per steradian) = watts (isotropic) = 4 * p W = 683 candela at 555 nm LUMINOUS INTENSITY: 1 lm/sr (lumens per steradian) = 1 candela (cd) = 4 * p lumens (isotropic) = x watts/sr at 555 nm
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광 측정 단위 *sr : steradian Radiometric Unit Photometric English Radiant
flux Watt Luminous flux Lumen Radiant Intensity Watt/sr Luminous Intensity candela Candela Radiance Watt/sr/m2 Luminance cd/m2 footLambert Irradiance Watt/m2 Illuminance lux Footcandle *sr : steradian
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단위 변환
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