This instructable will explain how to build a fairly basic but working spectrophotometer out of easily sourceable parts.

Of course, this device is nothing compared to a commercial spectrophotometer, but it will allow the builder to understand how such a device works.

• A beam of light passes through a prism or diffraction grating.
• Out of the resulting spectrum, a certain (range of) wavelength(s) gets selected by sending the light through a slit.
• The light passes through the sample and hits a detector.

This way, one can build a "spectrometric fingerprint" of a certain sample that will depend on the molecules in the sample.


Cool, let's do it!

I'd once again like to emphasize that this device is certainly not to be compared to a commercial system, but if you're looking for a fun project that will enable you to learn something more about the workings of a spectrophotometer, this project is for you!

原文链接地址http://www.instructables.com/id/A-simple-DIY-spectrophotometer/