Blondel to Lumen per Square Meter Steradian Conversion

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

From Blondel

blondel

To Lumen per Square Meter Steradian

lm/(m²·sr)

How to Convert Blondel to Lumen per Square Meter Steradian

Conversion Formula

1 blondel = 0.318 lm/(m²·sr)

1 lm/(m²·sr) = 3.142 blondel

Example

Convert 15 blondel to lm/(m²·sr):

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

Unit Information

Learn about the luminance units you're converting between

Blondel

blondel

Definition

The Blondel is a non-SI unit of luminance equal to 0.3183098862 candela per square meter, identical to the apostilb. It is named after the French physicist André Blondel and is used in some specialized photometric applications.

History/Origin

Named after the French physicist André Blondel, this unit was developed as part of early photometric systems. It is identical to the apostilb and provides an alternative way to express low luminance values in certain technical and historical contexts.

Current Use

Used in specialized photometric applications and historical contexts where the Blondel unit is preferred. Occasionally found in older technical specifications and certain branches of photometry where traditional 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