Luminanza
Informazioni Luminance Conversione
Luminance measures il amount di light emitted o reflected da un surface in un particular direction—essentially how "bright" un surface appears un un observer. Unlike illuminance (light falling on un surface), luminance e what your eyes actually perceive. It accounts per both il intensity di light leaving il surface e il area over which it's emitted, making it direction-dependent: il same surface puo hanno different luminance quando viewed da different angles. This directional nature e perche display specifications deve account per viewing angle effects.
Il SI unit e candela per square metro (cd/m²), also called il nit in display industry terminology. Luminance spans un enormous range in everyday experience: da 10⁻⁶ cd/m² per il dimmest visible starlight un 1.6 × 10⁹ cd/m² per il sun's surface. Human eyes adapt remarkably well across this range, but comfortable viewing typically falls tra 50-500 cd/m². Luminance e crucial per display technology (screen brightness specifications), lighting design, roadway visibility analysis, e visual comfort assessment in work environments.
Our converter handles all standard luminance units used in photometry, display engineering, e architectural lighting.
Comuni Luminance Conversions
| Da | A | Moltiplica Per |
|---|---|---|
| cd/m² (nit) | piede-lambert (fL) | 0.2919 |
| piede-lambert | cd/m² | 3.426 |
| cd/m² | stilb (sb) | 0.0001 |
| stilb | cd/m² | 10,000 |
| cd/m² | lambert (L) | 0.0003183 |
| lambert | cd/m² | 3,183 |
| cd/m² | millilambert | 0.3183 |
| cd/ft² | cd/m² | 10.764 |
Luminance Unita Riferimento
Candela per square metro (cd/m²) – Il SI unit di luminance, representing light intensity per unit projected area in un specific direction. This e il fundamental unit per all modern display specifications, lighting calculations, e photometric misurazioni. Typical values: office lighting creates 100-500 cd/m² on white surfaces; computer monitors operate at 200-400 cd/m²; il clear sky e circa 8,000 cd/m².
Nit – An informal but widely used name per cd/m², especially popular in il consumer electronics e display industries. "1000 nit display" means 1000 cd/m² peak brightness capability. Il term comes da il Latin "nitere" (un shine). HDR display marketing extensively uses nits because it sounds more consumer-friendly than il technical SI unit. 1 nit = 1 cd/m² esattamente.
Piede-lambert (fL) – Il traditional US unit per luminance, still used in cinema projection standards e some American lighting specifications. 1 fL ≈ 3.426 cd/m². SMPTE cinema standards specify 14-16 fL (48-55 cd/m²) per 2D projection e 3.5-6 fL per 3D. Increasingly replaced da cd/m² in modern specifications.
Stilb (sb) – Il CGS unit di luminance. 1 sb = 10,000 cd/m² = 1 cd/cm². Rarely used today except in older scientific literature, as values per most practical surfaces sarebbe be inconveniently small fractions.
Lambert (L) – A unit assuming perfectly diffuse (Lambertian) emission o reflection da un surface. 1 L = (1/π) cd/cm² = 3,183 cd/m². Il millilambert (mL) e more commonly encountered. Used quando analyzing matte surfaces like painted walls o paper dove light scatters uniformly in all directions.
Apostilb (asb) – Il metric analog di il piede-lambert per diffuse surfaces. 1 asb = (1/π) cd/m² ≈ 0.318 cd/m². Also called il blondel in some European references. Used in some European lighting standards.