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Light source KPIs

Why are CCT or CIE chromaticity coordinates not always the best parameters for designing your test requirements?

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Noise: SNR vs. visual noise

Noise is an important parameter in image quality evaluation. Occurring as a random signal variation for each pixel, noise has its source in the physical characteristic of light (photon-shot noise) and technical limitations of the sensor (dark current and read noise).

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Photometric measurements of LED light sources

"Photometer vs. spectrometer"

A standard photometer basically works with a silicon detector in combination with a v(λ) filter to correct for the spectral sensitivity of the human eye. The output current of the detector is directly related to the measured photometric measure value.

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How to deal with "unusual " SFR/MTF results?

... or what does the "!" in the results mean?

One important message we cannot give enough is "pixel count is not resolution". We see resolution as the capability of an imaging system to reproduce spatial frequencies. The higher the frequencies that can be transferred into image content, the higher the resolution.

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