Candela per square metre
Template:Infobox Unit The candela per square metre (symbol: cd/m2; alternatively titled candela per square meter) is the unit of luminance in the International System of Units (SI). The unit is based on the candela, the SI unit of luminous intensity, and the square metre, the SI unit of area.
The nit (symbol: nt) is a deprecated non-SI name also used for this unit (1 nt = 1 cd/m2).[1] The term nit is believed to come from the Latin word Template:Wikt-lang, "to shine".[2]
As a measure of light emitted per unit area, this unit is frequently used to specify the brightness of a display device. The sRGB spec for monitors targets 80 cd/m2.[3] Typically, monitors calibrated for SDR broadcast or studio color grading should have a brightness of 100 cd/m2.[4] Most consumer desktop liquid crystal displays have luminances of 200 to 300 cd/m2.[5] HDR displays range from around 400 to 2500 cd/m2.[6]
Comparison with other units of luminance
[edit | edit source]One candela per square metre is equal to:
- 10−4 stilbs (the CGS unit of luminance)
- π × 10−4 lamberts
- π apostilbs
- 0.292 foot-lamberts
- π × 103 skots
- π × 107 brils
- 1 nit
Template:Luminance conversions
See also
[edit | edit source]References
[edit | edit source]- ↑ Buser, Pierre; Imbert, Michel (1992). Vision. MIT Press. p. 53. ISBN 978-0-262-02336-8.
nit luminance.
- ↑ Boyd, RLF, ed. (1992). Astronomical Photometry. Springer. p. 9. ISBN 978-0-7923-1653-4.
- ↑ "Multimedia systems and equipment – Colour measurement and management – Part 2-1: Colour management – Default RGB colour space – sRGB". International Electrotechnical Commission. 1999. IEC 61966-2-1.
- ↑ "ITU-R BT.2035-7" (PDF). A reference viewing environment for evaluation of HDTV program material or completed programmes. 2013-08-13. Archived (PDF) from the original on 2022-12-20. Retrieved 2022-12-20.
- ↑ Hung, Jonathan (May 3, 2010). "Acer Ferrari One 200 Review – More than a Netbook". PC Perspective. Retrieved 2018-01-21.
- ↑ Cohen, Steven. "What is HDR? High dynamic range TVs and formats, explained". Business Insider. Retrieved 2024-05-08.