Blondel to Watt per Square Centimeter Steradian (at 555 nm) Conversion

Convert between Blondel and Watt per Square Centimeter Steradian (at 555 nm) quickly and accurately.

From Blondel

blondel

To Watt per Square Centimeter Steradian (at 555 nm)

W/(cm²·sr)

How to Convert Blondel to Watt per Square Centimeter Steradian (at 555 nm)

Conversion Formula

1 blondel = 5E-8 W/(cm²·sr)

1 W/(cm²·sr) = 21457077.823 blondel

Example

Convert 15 blondel to W/(cm²·sr):

15 blondel = 15 × 5E-8 W/(cm²·sr) = 7E-7 W/(cm²·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

Watt per Square Centimeter Steradian (at 555 nm)

W/(cm²·sr)

Definition

The Watt per Square Centimeter Steradian at 555 nm is a radiometric unit of luminance that measures radiant power per unit area and solid angle at the peak sensitivity wavelength of the human eye. It is used for precise photometric calculations and laser applications.

History/Origin

This unit was developed for applications requiring precise conversion between radiometric and photometric quantities. The 555 nm wavelength corresponds to the peak sensitivity of the human eye, making it ideal for accurate photometric measurements and laser safety calculations.

Current Use

Used in laser safety, precision photometry, and applications requiring exact conversion between radiometric and photometric units. Essential for laser power measurements, optical system design, and safety calculations where precise luminance values are critical.

Multiplier

6830000

Offset