Apostilb to Lumen per Square Meter Steradian Conversion

Convert between Apostilb and Lumen per Square Meter Steradian quickly and accurately.

From Apostilb

asb

To Lumen per Square Meter Steradian

lm/(m²·sr)

How to Convert Apostilb to Lumen per Square Meter Steradian

Conversion Formula

1 asb = 0.318 lm/(m²·sr)

1 lm/(m²·sr) = 3.142 asb

Example

Convert 15 asb to lm/(m²·sr):

15 asb = 15 × 0.318 lm/(m²·sr) = 4.775 lm/(m²·sr)

Unit Information

Learn about the luminance units you're converting between

Apostilb

asb

Definition

The Apostilb is a non-SI unit of luminance equal to 0.3183098862 candela per square meter. It is used in some specialized applications and provides an alternative way to express low luminance values in certain technical contexts.

History/Origin

This unit was developed as part of early photometric systems and is still used in some specialized applications. It provides a convenient way to express low luminance values and is occasionally found in technical specifications and measurement systems.

Current Use

Used in specialized photometric applications and certain technical contexts where traditional units are preferred. Occasionally found in older technical specifications and specialized measurement systems where non-SI units are still used.

Multiplier

0.318

Offset

Lumen per Square Meter Steradian

lm/(m²·sr)

Definition

The Lumen per Square Meter Steradian is a unit of luminance that explicitly shows the relationship between luminous flux, area, and solid angle. It is dimensionally equivalent to candela per square meter and provides insight into the geometric aspects of light measurement.

History/Origin

This unit was developed to emphasize the relationship between luminous flux, surface area, and solid angle in luminance measurements. It provides a more detailed understanding of how light is distributed and measured in three-dimensional space.

Current Use

Used in advanced photometry and lighting calculations where the relationship between flux, area, and solid angle is important. Common in research applications and detailed lighting analysis where understanding the geometric aspects of light distribution is crucial.

Multiplier

Offset