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How to Convert from Watt/sq. cm/steradian (at 555 nm) to Foot-lambert [fL]
Learn how to convert luminance values from watt per square centimeter per steradian at 555 nm to foot-lambert, an imperial luminance unit used in cinema and display calibration.
Please check your input. It must be a valid numeric value.
Watt/sq. cm/steradian (at 555 nm) to Foot-lambert [fL] Conversion Table
| Watt/sq. cm/steradian (at 555 nm) | Foot-lambert [fL] |
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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.
| Watt/sq. cm/steradian (at 555 nm) | Foot-lambert [fL] |
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What Is This Tool?
This converter transforms luminance measurements expressed in watt per square centimeter per steradian at 555 nm into foot-lambert, an imperial unit for luminance commonly used in theaters and display technologies.
How to Use This Tool?
- Enter the luminance value in watt per square centimeter per steradian at 555 nm.
- Select the input and output units accordingly.
- Initiate the conversion to get the equivalent luminance in foot-lambert.
Key Features
- Converts spectral radiance at 555 nm wavelength to foot-lambert units.
- Supports luminance measurement translation for optical metrology and display calibration.
- Browser-based and easy to use with quick conversion output.
Examples
- 0.5 watt/sq. cm/steradian (at 555 nm) converts to 996,713.88 foot-lambert.
- 2 watt/sq. cm/steradian (at 555 nm) converts to 3,986,855.52 foot-lambert.
Common Use Cases
- Translating radiometric spectral radiance to photometric luminance for vision research.
- Specifying or comparing LED and lamp outputs at the photopic peak wavelength.
- Calibrating and measuring screen brightness in cinema and home theater environments.
Tips & Best Practices
- Ensure measurements are taken specifically at 555 nm to maintain conversion accuracy.
- Use the tool to aid in equipment calibration and display comparison in imperial units.
- Pay close attention to unit scales due to the large conversion factor.
Limitations
- Conversion applies only to measurements at 555 nm wavelength reflecting peak human visual sensitivity.
- Using the tool for other wavelengths may produce incorrect luminance results.
- Large numerical conversion factors require careful handling to avoid errors.
Frequently Asked Questions
- Why is the wavelength 555 nm important in this conversion?
- 555 nm corresponds to the peak sensitivity of human vision in photopic conditions, which aligns radiometric and photometric measures for accurate luminance conversion.
Key Terminology
- Watt/sq. cm/steradian (at 555 nm)
- A radiometric spectral radiance unit measuring radiant power per square centimeter per steradian at the 555 nm wavelength, linked to photopic vision sensitivity.
- Foot-lambert (fL)
- An imperial luminance unit that quantifies luminous intensity emitted or reflected from a surface per unit projected area in a specified direction.
- Photopic Peak
- The wavelength of 555 nm at which human visual sensitivity under well-lit conditions is at its maximum.