Yoritish o'lchagichning yorqinligi va yorug'lik birligi o'rtasidagi konversiya aloqasi
(1) Yorug'lik manbai ob'ektga porlaganda, biz manba tomonidan chiqarilgan (Lumvnance? D yorqinligi) yoki ob'ekt tomonidan aks ettirilgan (Yorqinlik? D yorug'lik) o'lchashimiz mumkin.
(2) Yoritish ob'ektning aks ettiruvchi xususiyatlariga bog'liq. U fotosuratga juda o'xshaydi, chunki u faqat aks ettirilgan yorug'likni o'lchaydi. Uning umumiy birligi lyuksdir.
(3) Biroq, EL chiroq yorug'lik manbai hisoblanadi: u yorug'lik birliklarida ifodalanishi kerak, ya'ni fL (oyoq Lambert) yoki cd/m2, shuningdek, "nits" deb ham ataladi. Ba'zi muhandislar fL ni afzal ko'rishadi, Xalqaro standartlar tashkiloti esa nitslardan foydalanadi. nits fL ga quyidagi formula bo'yicha aylantiriladi: 1nits x 0.2919=1fL; va 1fL x 3.426=1nits [Eslatma; bu omillar pi(p) va m2/ft2 (0.0929) dan olingan.
(4) Lyuksdan foydalanish noto'g'ri birlik ekanligi va uni lyuksdan boshqa birliklarga aylantirib bo'lmasligi aniq. 1 lyuks=1 lumenpersquaremeter= 0.0929 futsham 1 fut sham= 1lumen persquarefoot =10,764 lyuks1 fut Lambert= 3, kvadrat metrga 426 kandela (nit) 1nit ( kvadrat metrga qandillar)=0.2919 futLambert
Yorug'lik oqimi
Yorug'lik oqimi (Luminousflux): ya'ni yorug'lik manbai tomonidan chiqarilgan yorug'lik energiyasining tezligi yoki yorug'lik oqimining tezligi (Flowarte), yorug'lik manbasining yorug'likning asosiy miqdorini chiqarish qobiliyatini tavsiflash uchun, lümen uchun birlik (Lumen). Masalan, 100-Vt (Vt) lampochka 1750 lm, 40 Vt salqin oq lyuminestsent naycha esa 3150 lm yorug'lik oqimi ishlab chiqarishi mumkin. Ta'rifga ko'ra, 1lm - bu 1 sferik graduslik stereo burchak ostida yorug'lik intensivligi (l) 1cd bo'lgan yagona nuqta yorug'lik manbai tomonidan chiqariladigan yorug'lik oqimi.
Yorug'lik intensivligi
Luminous intensity (Luminousintensity, Candlepower): Luminous intensity referred to as luminous intensity, refers to a stereo angle from the light source (unit sr) radiated by the luminous flux, that is, the light source or lighting fixtures emitted by the luminous flux in the space of the selected direction on the distribution of density in the unit of candela (CandleorCandela, cd). Luminous intensity of 1cd light source can radiate 12.57lm of luminous flux. Illumination illuminance (luminance): illuminated plane to receive the density of luminous flux, available per unit area of luminous flux to measure. 1lm of luminous flux uniformly distributed in 1 square meter (m2) of the surface, that is, to produce 1 lux (Lux, environmental technology>yorug'lik o'lchagichi) yorug'lik darajasi; 1 kvadrat fut (ft2) yuzasiga tushadigan yorug'lik oqimining 1lm, 1 fut-shamning yorug'lik qiymati ( Footsandle,fc).
