What does watt/sq. cm/steradian (at 555 nm) measure?

It is a radiometric spectral radiance unit measuring radiant power per projected area and solid angle at the wavelength 555 nm, aligning with the human eye's peak photopic sensitivity.

Why convert to candela per square centimeter?

Candela per square centimeter expresses luminance as perceived by human vision, useful for specifying brightness of small light-emitting surfaces.

Is this conversion valid for all wavelengths?

No, this conversion specifically applies to measurements at 555 nm and may not be accurate for other wavelengths.

How to Convert from Watt/sq. cm/steradian (at 555 nm) to Candela/square centimeter

Learn the method for converting luminance values from watt per square centimeter per steradian at 555 nm to candela per square centimeter, useful for display engineering and optical metrology.

Watt/sq. cm/steradian (at 555 nm)

Candela/square centimeter

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Watt/sq. cm/steradian (at 555 nm) to Candela/square centimeter Conversion Table

Watt/sq. cm/steradian (at 555 nm)	Candela/square centimeter

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Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

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Watt/sq. cm/steradian (at 555 nm) to Candela/square centimeter Conversion Table
Watt/sq. cm/steradian (at 555 nm)	Candela/square centimeter

Explore More Luminance Units Converter

What Is This Tool?

This converter changes luminance measurements from watt per square centimeter per steradian at the wavelength 555 nm, a radiometric spectral radiance unit, into candela per square centimeter, a photometric luminance unit used for small emitting surfaces.

How to Use This Tool?

Enter the luminance value in watt/sq. cm/steradian at 555 nm.
Select watt/sq. cm/steradian (at 555 nm) as the source unit.
Choose candela/square centimeter as the target unit.
Use the tool to calculate the equivalent luminance in candela/square centimeter.

Key Features

Converts spectral radiance units at 555 nm to photometric luminance units.
Uses a conversion factor based on peak human photopic sensitivity.
Supports luminance characterization of small light sources and display elements.
Applied in optical metrology, vision research, and display engineering.

Examples

0.5 watt/sq. cm/steradian (at 555 nm) converts to 341.5 candela/square centimeter.
2 watt/sq. cm/steradian (at 555 nm) converts to 1366 candela/square centimeter.

Common Use Cases

Translating radiometric spectral radiance data for vision-related applications.
Specifying brightness of LEDs, lamps, and optical systems at 555 nm.
Characterizing luminance of small-area light sources like camera viewfinders and surgical lamps.
Calibrating instruments in photometric testing and display engineering.

Tips & Best Practices

Ensure the spectral measurement corresponds exactly to 555 nm for accuracy.
Use this conversion specifically for monochromatic photopic conditions.
Perform instrument calibration to maintain measurement reliability at 555 nm.
Apply the conversion when dealing with small area luminance sources.

Limitations

Conversion assumes monochromatic light at 555 nm and may not be accurate for other wavelengths.
Applicable mainly for spectral radiance, not for broadband or non-photopic sources.
Accuracy depends on precise spectral calibration and instrument response at 555 nm.

Frequently Asked Questions

What does watt/sq. cm/steradian (at 555 nm) measure?: It is a radiometric spectral radiance unit measuring radiant power per projected area and solid angle at the wavelength 555 nm, aligning with the human eye's peak photopic sensitivity.
Why convert to candela per square centimeter?: Candela per square centimeter expresses luminance as perceived by human vision, useful for specifying brightness of small light-emitting surfaces.
Is this conversion valid for all wavelengths?: No, this conversion specifically applies to measurements at 555 nm and may not be accurate for other wavelengths.

Key Terminology

Watt/sq. cm/steradian (at 555 nm): A radiometric spectral radiance unit measuring radiant power per projected area per solid angle at 555 nm, related to the photopic peak of human vision.
Candela/square centimeter: A photometric luminance unit expressing luminous intensity emitted per unit projected area, commonly used for small emitting surfaces.
Photopic Peak: The wavelength around 555 nm at which human visual sensitivity is highest under well-lit conditions.

Quick Knowledge Check

What does the watt/sq. cm/steradian (at 555 nm) unit represent?

Luminous intensity per area

Radiant power per projected area and solid angle at 555 nm

Brightness of a surface

Why is 555 nm important in this conversion?

It corresponds to the spectral peak of infrared light

It aligns with the peak sensitivity of human photopic vision

It is the maximum wavelength emitted by LEDs

What is the conversion factor from watt/sq. cm/steradian (at 555 nm) to candela/square centimeter?

10,000

683

1,000

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