The Public Lab Desktop Spectrometry Kit 3.0 includes all the parts for a compact, simple, yet powerful experimental tool – a visible/near-infrared spectrometer, also known as a spectroscope or spectrophotometer. In less than 30 minutes of assembly, you can plug it into your computer with a USB cable and begin using the SpectralWorkbench.org software and website to collect spectra – the “fingerprint” of a material. The kit includes:
Developed by Public Lab contributors, this open source instrument is capable of better than 3 nanometer spectral resolution and can record light from ~390 to ~900nm. Though experimental, this tool has already been used to collect spectral data on contaminated water, laundry detergent, wines, and fishtank lights. You can help to improve it and find new applications!
The Public Lab Foldable Mini-Spectrometer folds up in minutes to transform your smartphone into a compact, simple, yet powerful experimental tool – a visible/near-infrared spectrometer, also known as a spectroscope or spectrophotometer.
This kit comes die-cut from thick, light-blocking black card stock and includes a DVD (used as a diffraction grating), a custom fit collimation slit, along with complete instructions for assembly (and downloadable design files), attachment to your phone or webcam, and calibration to take and share accurate spectra through Spectral Workbench. Just add glue or tape!
This is a bundle of narrow variants to the .4mm slit found in our spectrometry kits. These collimation slits provide a very clean beam of light through a .09mm, .12mm, .15mm, or .18mm slit. They are made with silver nitrate photo emulsion on thin, flexible acetate.
Why would you want these? Well, the short answer is that if you have enough light available, you can use a smaller slit to get higher resolution. A wider slit increases sensitivity by admitting more light, but lowers resolution because spectral lines will be more blurred. Choosing a slit is a balance between these, but if you can increase the light available, you can typically use a narrower slit and get good resolution without losing signal strength.
We make this range of apertures available to allow you to experiment and find the optimal size for your application.
Make sure to handle with gloves as hand oils will affect your spectroscopy.