# spectrometry

The Public Lab spectrometry project is an open source community effort to develop low-cost spectrometers for a range of purposes. All open spectrometry hardware and software efforts are welcome here! **Join in by:** * Learning [what spectrometry is](#Whats+spectrometry) * Reading about goals and [asking great questions](#Frequently+Asked+Questions) * Building a basic spectrometer using [one of our starter kits](#Starter+Kits) * Trying (and critiquing) our [community-made how-to guides](#Activities) and posting your own * Building on others’ work; hack and remix the kits to refine and expand them * [Share your upgrades](#Upgrades) for others to try -- and perhaps for inclusion in an upcoming starter kit release or add-on kit ## Activities This is a list of community-generated guides for specific applications using your spectrometry setup (either a [starter kit](#Starter+Kits) or a [modded design](#Upgrades)). These [activities can be categorized](https://publiclab.org/wiki/activity-categories), and some may be more reproduced -- or reproducible -- than others. Try them out to build your skills, and help improve them by leaving comments. Together, we can repeat and refine the activities into experiments. > **Note:** If you are working on an **urgent issue** such as a threat to your or someone else’s health, please know that these techniques may not be ready for your use; it's possible that they never will be. [Read more here](/notes/gretchengehrke/09-29-2016/common-low-cost-technique-limitations) ### Activity grid [activities:spectrometry] **** ## Upgrades Have you added to your starter kit, improved it, or redesigned it? Show others how to take it to the next level by posting a build guide here: [upgrades:spectrometry] <a href="/post?tags=upgrade:spectrometry,seeks:builds&title=How%20to%20do%20X" class="btn btn-primary">Add your upgrade guide here</a> <a href="/post?tags=request:upgrade,page:spectrometry&template=question&title=How%20do%20I...&redirect=question" class="btn btn-primary">Request or propose an upgrade</a> _Mods should include a parts list and a step-by-step construction guide with photo documentation. See an example._ ## Builds There’s a lot going on in open source spectrometry -- if you’ve developed another open source design you’d like to show others how to construct, post it here! * [RamanPi](https://hackaday.io/project/1279-ramanpi-raman-spectrometer) * [Hackteria “drop”-style spectrometers](https://publiclab.org/notes/gaudi/04-03-2014/diy-micro-volume-spectrophotometer) / [DIY NanoDrop on Hackteria.org](http://hackteria.org/wiki/index.php/DIY_NanoDrop) * _Add yours here_ ## Starter Kits Public Lab’s Kits initiative offers several starter kits, including many of the basic components, and instructions for constructing a basic visible light spectrometer. The point of the kits is to provide a shared reference design for building experimental setups onto. <div class="row"> <div class="col-md-6"> <a href="/wiki/desktop-spectrometry-kit-3-0"><img style="width:100%" class="img-rounded" src="https://i.publiclab.org/system/images/photos/000/010/452/large/IMG_20150521_144354_2_%28copy%29.jpg" /></a> <h3>Desktop Spectrometry Kit v3</h3> <p>Our most recent “reference design”, incorporating some community improvements while balancing low cost and relative ease of construction. </p> <p> <a class="btn btn-primary" href="/wiki/desktop-spectrometry-kit-3-0"><i class="icon-white icon-wrench"></i> Build one</a> <a class="btn btn-primary" href="http://store.publiclab.org/products/desktop-spectrometry-kit-3-0"><i class="icon-white icon-shopping-cart"></i> Buy one</a> </p> </div><div class="col-md-6"> <a href="/wiki/foldable-spec"><img style="width:100%" class="img-rounded" src="https://i.publiclab.org/system/images/photos/000/005/497/original/spec-fold.jpeg" /></a> <h3>Foldable Mini-Spectrometer</h3> <p>A 10 foldable spectrometer which you can attach to a smartphone or webcam. It’s made of paper to reduce cost and complexity, and is mainly intended as an “introductory” or educational kit. </p> <p> <a class="btn btn-primary" href="/wiki/foldable-spec"><i class="icon-white icon-wrench"></i> Build one</a> <a class="btn btn-primary" href="http://store.publiclab.org/products/foldable-mini-spectrometer"><i class="icon-white icon-shopping-cart"></i> Buy one</a> </p> </div> </div> **** ##What's spectrometry? Colored light is often a blend of different colors. A spectrometer is a device which splits those colors apart, like a prism, and measures the strength of each color. A typical output of a spectrometer looks like this spectrum of the daytime sky, with the actual light spectrum at the top and the graph of wavelength (horizontal axis, in nanometers of wavelength) and intensity (vertical axis) below: [![sky.png](https://i.publiclab.org/system/images/photos/000/005/455/original/sky.png)](https://spectralworkbench.org/analyze/spectrum/19882) > Needed: overview of spectra, calibration, units, comparison, and fluorescence/absorption. Please edit this page or link to a resource, potentially [the Wikipedia page](https://en.wikipedia.org/wiki/Spectroscopy), although that's quite full of technical jargon. ## Software Spectral data can be analyzed with https://spectralworkbench.org to create spectra plots, find centers of emissions plots, and find similar spectra. Data also can be exported in various formats (JSON, CSV, XML) for further analysis and visualization. ## How does this compare to a lab instrument? The [Desktop Spectrometry Starter Kit](/wiki/desktop-spectrometry-kit-3-0) is only one part in an experimental setup, and the following shows where it fits in an overall diagram of a lab spectrometric setup: [![tmp_31873-IMG_20161027_101601_2-79757779.jpg](https://publiclab.org/system/images/photos/000/018/635/large/tmp_31873-IMG_20161027_101601_2-79757779.jpg)](https://publiclab.org/system/images/photos/000/018/635/original/tmp_31873-IMG_20161027_101601_2-79757779.jpg) [![tmp_31873-IMG_20161027_095939_2-108076392.jpg](https://publiclab.org/system/images/photos/000/018/636/large/tmp_31873-IMG_20161027_095939_2-108076392.jpg)](https://publiclab.org/system/images/photos/000/018/636/original/tmp_31873-IMG_20161027_095939_2-108076392.jpg) There are many, many different types of spectrometry and spectrometers -- many don’t even measure light. Even among those that do, some detect light in the ultraviolet range, and others in the infrared range of light. The range of Public Lab spectrometers depends on the range of the commercially available cameras we attach them to (~400-700 nanometer wavelengths). A commercially available product with a slightly wider range (from 335 to 1000 nanometers) is [available from Cole Parmer](http://www.coleparmer.com/Product/Cole_Parmer_Visible_spectrophotometer_335_to_1000_nm_wavelength_range_analog_output/UX-83055-10). **** ## Frequently Asked Questions [questions:spectrometry] Note our previous Frequently Asked Questions page, which [can be found here &raquo;](/wiki/spectrometer-faq) -- please help port these into the new system, here! ##### New webcams for PLOTS video spectrometer Post by @warren 0 | over 7 years ago ##### Field Spec 3 demonstration video Post by @warren 0 | over 7 years ago ##### Spectral Workbench user login system Post by @warren 0 | over 7 years ago ##### Fluorescence in olive oil with green laser Post by @warren 0 | over 7 years ago ##### Spectral sensing for metals Post by @Shannon 0 | over 7 years ago ##### Sketches for a self-contained portable spectrometer using a Raspberry Pi Post by @warren 19 | over 7 years ago ##### Cell Phone Spectrophotometer Post by @mathew 0 | almost 8 years ago ##### Geologists take over Vienna Post by @adam-griffith 5 | over 7 years ago ##### General spectrometer thoughts Post by @adam-griffith 2 | over 7 years ago ##### Spectrometer alignment ideas Post by @warren 1 | over 7 years ago ##### 370nm UV detection of Corexit-dispersed oil on Gulf Coast Beaches Post by @eustatic 3 | almost 8 years ago ##### PLOTS adoption of the CERN Open Hardware License Post by @warren 0 | almost 8 years ago ##### spectrometer hardware with higher resolution Post by @mmittler 2 | almost 8 years ago ##### Solar spectrum monitoring setup Post by @warren 2 | almost 8 years ago ##### Wine spectroscopy with Adam Hasler Post by @warren 5 | 8 years ago ##### spectrum matching Post by @jeffreyjoy 2 | 8 years ago ##### Hyperspectral scan of an apple at ~553 nanometers Post by @warren 0 | 8 years ago ##### Visible-light spectrometer for2,660, 4-7nm bandwidth
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6   |   8 years ago

##### Arsenic detection with UV-Vis spectrometry
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2   |   over 8 years ago

##### Steps towards DIY Spectrometry
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0   |   over 8 years ago

##### Several new spectra from food samples
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0   |   over 8 years ago

##### UV-Visible spectral features of Benzine and some PAHs
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0   |   over 8 years ago

##### Gowanus water absorption spectrum
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0   |   over 8 years ago

##### Near-infrared spectral features of Benzine
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0   |   over 8 years ago