Measuring Etendue of LED sources

Thread starter Samu
Start date Mar 31, 2014
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Led Measuring Sources

In summary, the etendue of an LED source is a measure of its light-gathering ability and is typically measured using a goniophotometer. Factors such as the size and shape of the LED chip, optics, and thermal management can affect the etendue. Compared to other light sources, LEDs typically have a higher etendue due to their directional emission. Measuring the etendue is significant for practical applications as it allows for the optimization of LED performance and efficiency.

Mar 31, 2014

Samu

How does one measure the etendue experimentally (when the area of the emitter and the angular distribution is not provided) in order to compare the focusing strength of two LED sources in an optical setup?

Thanks!

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Apr 1, 2014

UltrafastPED

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Here is a lab exercise: http://engineering.tufts.edu/bme/people/georgakoudi/EN31Lab5PolarizationLab.pdf

1. What is the purpose of measuring the etendue of LED sources?

The etendue of an LED source is a measure of its light-gathering ability. It is important to measure this parameter in order to understand the efficiency of the LED and how much light it can emit.

2. How is the etendue of an LED source typically measured?

The etendue of an LED source is typically measured using a goniophotometer, which is a device that measures the light intensity and distribution of a source at different angles. The data from the goniophotometer is then used to calculate the etendue of the LED source.

3. What factors can affect the etendue of an LED source?

The etendue of an LED source can be affected by several factors, including the size and shape of the LED chip, the optics used to focus the light, and the thermal management of the LED. These factors can impact the overall light output and efficiency of the LED source.

4. How does the etendue of an LED source compare to other types of light sources?

The etendue of an LED source is typically higher than other types of light sources, such as incandescent or fluorescent bulbs. This is because LEDs are able to emit light in a more focused and directional manner, resulting in a higher etendue.

5. What is the significance of measuring the etendue of an LED source for practical applications?

Measuring the etendue of an LED source is important for practical applications because it allows for the optimization of the LED's performance and efficiency. This information can be used to improve lighting designs and ensure that the LED is being used to its full potential.