Infrared – Variable Wavelength IR Diode

infraredledphysics

I was thinking of building a DIY IR Spectroscope but for this, I need to find an IR diode that can do variable wavelengths. So far I have looked at Farnell and Mouser but all the diodes I have looked at seem to be fixed on a wavelength.

Is this possible? or would I need some sort of filters and optical equipment, if so which parts would I need?

Thanks.

Best Answer

There may be an near-infrared narrow band wavelength optical converter that would do the job. But not likely an affordable solution.

The more common NIR light source would be to use a broadband (200-2000 nm) Quartz Tungsten-Halogen (QTH) light source.

StellarNet has some inexpensive calibrated light sources in the $400 to $2,000 range.

You may want to use a QTH light lamp for under $200. Or if a very tight budget buy a QTH light bulb for about $10. ThorLabs QTH Lamps

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