Convert Millilamberts to Apostilbs
Convert Millilamberts (mL) to Apostilbs (asb) instantly and accurately.
Conversion Formula
asb = mL × 10
About Millilamberts
The millilambert (mL) equals 10/π cd/m² ≈ 3.183 cd/m². Historically used in the United States to specify projection screen luminance and oscilloscope phosphor brightness. A projection screen with luminance 1 mL ≈ 3.18 cd/m². Largely superseded by cd/m² and foot-lamberts in modern display standards. 1 mL = 10/π cd/m².
About Apostilbs
The apostilb (asb) equals 1/π cd/m² ≈ 0.3183 cd/m², defined as the luminance of a perfectly diffuse Lambertian surface with an exitance of 1 lm/m². Introduced by the CIE in 1940 and used in European photometry standards and retinal illuminance calculations. 1 asb = 1/π cd/m² ≈ 0.3183 cd/m².
Quick Reference Table
| Millilamberts (mL) | Apostilbs (asb) |
|---|---|
| 1 mL | 10 asb |
| 2 mL | 20 asb |
| 5 mL | 50 asb |
| 10 mL | 100 asb |
| 25 mL | 250 asb |
| 50 mL | 500 asb |
| 100 mL | 1000 asb |