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

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

From Apostilb

asb

To Watt per Square Centimeter Steradian (at 555 nm)

W/(cm²·sr)

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

Conversion Formula

1 asb = 5E-8 W/(cm²·sr)

1 W/(cm²·sr) = 21457077.823 asb

Example

Convert 15 asb to W/(cm²·sr):

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

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