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Convert Lambert [L] to Watt/sq. cm/steradian (at 555 nm)
Easily convert luminance values from lambert [L], a historic CGS unit, to watt per square centimeter per steradian at 555 nm, facilitating comparisons between photometric and radiometric measurements.
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Lambert [L] to Watt/sq. cm/steradian (at 555 nm) Conversion Table
| Lambert [L] | Watt/sq. cm/steradian (at 555 nm) |
|---|
Custom Unit Conversion Table Generator – Instant Printable Conversion Tables
Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.
Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.
Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.
| Lambert [L] | Watt/sq. cm/steradian (at 555 nm) |
|---|
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What Is This Tool?
This converter allows you to change luminance values from lambert [L], a traditional photometric unit, to watt per square centimeter per steradian at 555 nm, a radiometric spectral radiance measure aligned with human visual sensitivity.
How to Use This Tool?
- Enter the luminance value in lambert [L] you wish to convert.
- Select lambert [L] as the source unit and watt/sq. cm/steradian (at 555 nm) as the target unit.
- Execute the conversion to obtain the equivalent radiometric spectral radiance value.
Key Features
- Converts luminance from lambert [L] to radiometric units at the photopic peak wavelength of 555 nm.
- Supports optical engineering, vision research, and instrument calibration applications.
- Browser-based and easy to use without requiring specialized software.
Examples
- Converting 5 Lambert [L] results in 0.0023302335 Watt/sq. cm/steradian (at 555 nm).
- Converting 10 Lambert [L] gives 0.004660467 Watt/sq. cm/steradian (at 555 nm).
Common Use Cases
- Translating historic CGS luminance data into radiometric values at 555 nm for analysis.
- Calibrating instruments by relating photometric and radiometric measurements.
- Evaluating LED and lamp output in optical metrology and photometric testing.
Tips & Best Practices
- Ensure measurements are taken or referenced at the wavelength of 555 nm for accurate conversion.
- Consider consistency when mixing lambert with SI units in analyses.
- Use this tool to aid comparisons between photometric brightness and radiometric power in vision science.
Limitations
- Conversion applies specifically to 555 nm wavelength and may not be accurate for other wavelengths.
- Lambert is a non-SI unit, requiring caution when combining with SI-based data.
- Radiometric and photometric units represent different concepts, so conversions rely on assumptions about spectral sensitivity.
Frequently Asked Questions
- What is a lambert [L] unit?
- Lambert [L] is a non-SI CGS unit of luminance used for describing the brightness of self-luminous or diffusely reflecting surfaces.
- Why is the conversion specific to 555 nm?
- Because 555 nm corresponds to the photopic peak of human visual sensitivity, aligning photometric and radiometric measurements.
- Can I use this tool for wavelengths other than 555 nm?
- No, this conversion is wavelength-specific and does not directly apply to other wavelengths.
Key Terminology
- Lambert [L]
- A non-SI CGS unit of luminance defining brightness of surfaces, equal to one over pi candela per square centimeter.
- Watt/sq. cm/steradian (at 555 nm)
- A radiometric spectral radiance unit measuring radiant power per area per solid angle at 555 nm wavelength.
- Photopic Peak
- The wavelength (555 nm) at which human visual sensitivity to light is highest under well-lit conditions.