Anyone happen to know the output/input spectrum of the QTI sensor?

ElectricAye

In a previous post, Phil Pilgrim mentioned that the wavelength of the QTI sensor emitter was 940 nm.

http://forums.parallax.com/showthread.php?p=769467


But does anyone know what is the peak of the detector's efficiency?

Also, might anyone have the shape of the spectra for either the light output or detector input or overall system response?

I'm considering using this device to measure absorption of light within a narrow band of wavelengths by using a filter but it would be nice to know what the system response spectrum looks like so I know at what wavelength to choose the filter.

thanks,
Mark

ElectricAye

Okay, I just noticed the sensor has a "daylight filter" on it. That should be enough info to get me in the ballpark.

www.fairchildsemi.com/ds/QR/QRD1113.pdf



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