Caidreamh comhshó idir gile an mhéadair illuminance agus an t-aonad illuminance
(1) Nuair a scairteann foinse solais ar rud, is féidir linn a thomhas cé acu a astaítear leis an bhfoinse (gile Lumvnance? D) nó cé acu atá frithchaite ag an réad (Illuminance? D illuminance).
(2) Braitheann illuminance ar airíonna frithchaiteacha ruda. Tá sé an-chosúil le grianghraf sa mhéid is nach dtomhaiseann sé ach solas frithchaite. Is é an t-aonad coiteann lux.
(3) Mar sin féin, is foinse solais é lampa EL: ba cheart é a chur in iúl in aonaid luminance, ie, fL (feet Lambert) nó cd/m2, ar a dtugtar "nits" freisin. Is fearr le roinnt innealtóirí FL, agus úsáideann an Eagraíocht um Chaighdeáin Idirnáisiúnta nits. déantar nits a thiontú go fl leis an bhfoirmle: 1nits x 0.2919=1fL; agus 1fL x 3.426=1nits [Nóta; díorthaítear na fachtóirí seo ó pi(π) agus m2/ft2 (0.0929).
(4) Is léir gur aonad mícheart é úsáid lux, agus ní féidir é a thiontú ó lux go haonaid eile. 1 Lus=1 lumenpersquaremeter= 0.0929 coinneal coise 1 choinnleán coise= 1lúman peirceogán =10.764 Lux1 troigh Lambert= 3.426 coinneal in aghaidh an mhéadair chearnaigh (nit) 1nit ( candelas in aghaidh an mhéadair chearnaigh)=0.2919 footLambert
Flux lonrúil
Flosc lonrúil (Luminousflux): is é sin, an ráta fuinnimh solais a radaítear ag foinse solais nó an ráta sreafa solais (Flowarte), chun cur síos ar chumas na foinse solais chun solas a astú an méid bunúsach solais, an aonad don lumen (Lumen). Mar shampla, is féidir le bolgán solais 100-watt (W) 1,750lm a tháirgeadh, agus is féidir le feadán fluaraiseacha bán fionnuar 40W 3,150lm de shreabhadh lonrúil a tháirgeadh. De réir sainmhínithe, is é 1lm an flosc lonrúil a astaítear le foinse solais pointe aonfhoirmeach de dhéine lonrúil (l) 1cd ag uillinn steirió 1 céim sféarúil.
Déine lonrúil
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>méadar illuminance) den illuminance; 1lm den fhlosc lonrúil ag titim ar an dromchla de 1 troigh cearnach (ft2), an luach soilsithe de 1 choinnle coise ( Footcandle,fc).
