What is lumen/sq. cm/steradian used for?

It is used to characterize luminance of very small or high-brightness light sources, such as micro-LED or OLED emitters, and for optical measurements requiring luminance per small area.

Why convert lumen/sq. cm/steradian to apostilb?

This conversion helps translate modern luminance measurements into a historical unit commonly used in older photometric specifications and calibration standards.

Is apostilb part of the SI units?

No, apostilb is a non-SI, historical unit of luminance equal to 1/π candela per square metre and is mostly used for reference in older data.

How to Convert from Lumen/sq. cm/steradian to Apostilb?

Learn how to convert luminance measurements from lumen per square centimetre per steradian to apostilb. Understand the units, use cases, and the conversion process for photometric applications.

Lumen/sq. cm/steradian

Apostilb

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Lumen/sq. cm/steradian to Apostilb Conversion Table

Lumen/sq. cm/steradian	Apostilb

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Start Value

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Lumen/sq. cm/steradian to Apostilb Conversion Table
Lumen/sq. cm/steradian	Apostilb

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What Is This Tool?

This converter allows you to transform luminance values from lumen/sq. cm/steradian, a measurement used for very small or high-brightness light sources, into apostilb, a historical photometric unit. This is useful for comparing modern measurements with traditional units used in lighting and display technologies.

How to Use This Tool?

Enter the luminance value in lumen per square centimetre per steradian
Select lumen/sq. cm/steradian as the input unit
Choose apostilb as the output unit
Click convert to get the equivalent luminance in apostilb

Key Features

Convert luminance units from lumen/sq. cm/steradian to apostilb easily
Browser-based and simple to use without additional software
Supports applications in photometric instrumentation, display calibration, and lighting design
Provides examples for quick reference and understanding

Examples

1 lumen/sq. cm/steradian equals 31,415.9265 apostilb
0.5 lumen/sq. cm/steradian equals 15,707.9633 apostilb

Common Use Cases

Measuring brightness of micro-LED or OLED pixels with very small-area luminance
Calibrating luminance meters for small or high-intensity light sources
Reporting screen brightness based on historical photometric units
Analyzing luminance of diffusely reflecting surfaces in lighting engineering

Tips & Best Practices

Ensure accurate input values for precise conversion results
Use this tool when working with historical or non-SI luminance data
Cross-check converted values when integrating with modern SI units
Utilize the provided examples to verify correctness of conversions

Limitations

Apostilb is a non-SI, historical unit and may be less common in modern standards
Conversion precision might be affected by rounding limitations
Use caution when integrating apostilb values with current SI-based measurements

Frequently Asked Questions

What is lumen/sq. cm/steradian used for?: It is used to characterize luminance of very small or high-brightness light sources, such as micro-LED or OLED emitters, and for optical measurements requiring luminance per small area.
Why convert lumen/sq. cm/steradian to apostilb?: This conversion helps translate modern luminance measurements into a historical unit commonly used in older photometric specifications and calibration standards.
Is apostilb part of the SI units?: No, apostilb is a non-SI, historical unit of luminance equal to 1/π candela per square metre and is mostly used for reference in older data.

Key Terminology

Lumen/sq. cm/steradian: A photometric unit of luminance quantifying luminous flux per square centimetre per steradian; equivalent to candela per square centimetre.
Apostilb: A non-SI, historical unit of luminance defined as one divided by π candela per square metre used in older photometric data.
Candela: The SI base unit of luminous intensity, equal to one lumen per steradian.

Quick Knowledge Check

What does lumen/sq. cm/steradian represent?

Luminous flux per unit area and unit solid angle

A measurement of distance

Electrical conductivity of light sources

Which unit is apostilb equivalent to in terms of candela per square metre?

π candela per square metre

One divided by π candela per square metre

Ten thousand candela per square metre

In which industries is converting from lumen/sq. cm/steradian to apostilb commonly used?

Photometric instrumentation and display calibration

Automotive engineering

Food processing

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