Support Public Lab Today! For the last twelve years, Public Lab has hosted SpectralWorkbench.org so that people everywhere can calibrate and analyze their spectra. Unfortunately, current circumstances have led us to scale back and take certain services offline. SpectralWorkbench.org will go offline as of August 15, 2022. The SpectralWorkbench platform runs on a combination of volunteer and paid labor by the many people that build, maintain, and operate it via Public Lab. This is an effective combination thanks to the culture of Public Lab's Coding Community. Public Lab's web ecosystem, including PublicLab.org, MapKnitter.org, SpectralWorkbench.org, Infragram.org and associated projects, takes 20 hours a week from three Code Coordinators and our sysadmin. While cost effective, it is not free. Web hosting and server costs for SpectralWorkbench are approximately $1000 per month. We are doing our best to sustain programming and support for our community, and we need your help. Thank you for being part of our community. We can't wait to be back online with you. Support Public Lab by making a donation today. ###What is Spectral Workbench? [SpectralWorkbench.org](https://spectralworkbench.org) is a web based application to collect, archive, share, and analyze spectral data, for Public Lab [DIY spectrometers](/wiki/spectrometer) and other spectrometers. With it, you can: * connect your USB [Desktop Spectrometry Kit](/wiki/desktop-spectrometry-kit-3-0) * scan and save samples * wavelength calibrate your spectrometer * plot light intensity as a function of wavelength (average digital consumer cameras have a range of 400 to 700 nm) * create sets of multiple spectra to visually compare and analyze scans * download CSV data for offline analysis * view others' data and discuss * find similar data in [a database of over 60k spectra](https://spectralworkbench.org/stats) No download is required -- just a web connection. The Chrome browser works best, but most standard-compliant browsers are supported. It is possible to use from an Android smartphone, preferably with the Firefox browser which allows you to specify which camera to look through. **** ###Contents * [Learn to use the software](/wiki/spectral-workbench-usage) * Learn about the [available tools](/wiki/spectral-workbench-tools) * Learn about [Calibration](/wiki/spectral-workbench-calibration) * Learn about the [Snapshots system](/wiki/spectral-workbench-snapshots) * Learn about the [Operations system](/wiki/spectral-workbench-operations) * [Spectrometry in general](/wiki/spectrometer) * [Applications & uses](/wiki/spectral-analysis) * [Construction](/wiki/spectrometer-construction) * [Desktop Spectrometry Kit](/wiki/desktop-spectrometry-kit-3-0) * [Foldable Mini-Spectrometer](/wiki/foldable-spec) * [Troubleshooting](/wiki/spectral-workbench-help) * [API Docs](/wiki/spectral-workbench-api) **** ###Intro video ## Browsers Spectral Workbench should work on Chrome (in Windows/Mac/Linux/Android, but not iOS), Firefox (Windows/Mac/Linux/Android), or Opera (Android). It may work on other browsers and we are working on expanding coverage; read more on this page: https://github.com/publiclab/spectral-workbench.js/issues/87 **** ## Development Do you code? The codebase of Spectral Workbench is available at https://github.com/publiclab/spectral-workbench. The server is written in Ruby on Rails, with a lot of client side code in JavaScript. You can read about [the JavaScript API here](/wiki/spectral-workbench-api). We really need more developers, so if you are interested, please get involved! A great place to start is the "plots-dev" mailing list for software developers: http://publiclab.org/wiki/developers **** ## FAQ We're collecting and working our way through a range of questions about Spectral Workbench -- if you can contribute your own questions, or answer others', please do! [questions:spectral-workbench] **** ## Troubleshooting If you feel you've encountered a bug with the software -- very possible! Please look through existing issues listed here, file a new one if you don't see something similar, and help to add any observations to existing issues shown here. Thanks for helping improve this open source software! [questions:spectral-workbench-issues] ...
| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Hi, we actually don't have a profile deletion system on Spectral Workbench, apologies! " | Read more » | over 7 years ago | |||
| dsvilko | "Ups, I meant mercury, not sodium, of course. The line I can't identify is the one at 445.1 and 445.9nm. Any ideas? Also, are the two faint lines on..." | Read more » | over 7 years ago | |||
| cfastie | "I didn't know sodium was used as a phosphor in CFL lamps. That green line is one of the brightest in CFL spectra and in all mercury spectra, and me..." | Read more » | over 7 years ago | |||
| dsvilko | "By comparing my spectra of the Sun (more lines for precise polinomial callibration) with that of the CFL lamp, I can confirm that the green line is..." | Read more » | over 7 years ago | |||
| xose | "Cool!! Another interesting point to have in mind is the orientation of the slit in relation to that of the diffraction grating. More info here: htt..." | Read more » | over 7 years ago | |||
| saeed957 | "Thanks Xose, no I haven't tried but I will give it a try. " | Read more » | over 7 years ago | |||
| xose | "Hi @saeed957! Have you tried using a mobile phone? You can try taking the picture first and then upload it to the Spectralworkbench. I've modified..." | Read more » | over 7 years ago | |||
| xose | "Hi nnole! If you are using the spectralworkbench when you are prompt to authorize the use of the camera (using chrome at least) you should be able ..." | Read more » | almost 8 years ago | |||
| nnole | "Hi sorry I was not specific. I built a small spectrophotometer that is connected to a small USB camera. My laptop has a camera as well so I don't k..." | Read more » | almost 8 years ago | |||
| xose | "Hi @nnole! Can you specify a little bit more your question? There are different answers depending, first of all, on the spectrometer you are using ..." | Read more » | almost 8 years ago | |||
| phil3D | "@phil3D awards a barnstar to mathew for their awesome contribution! " | Read more » | almost 8 years ago | |||
| liz | "Thanks @zega! " | Read more » | about 8 years ago | |||
| zega | "Oh and i suggest using QTI plot (you can zoom into graph data way better then excel, plot traces with just right click/plot) very nice open source ..." | Read more » | about 8 years ago | |||
| zega | "Yes i do, here: FC__long.txt " | Read more » | about 8 years ago | |||
| warren | "Oh, great -- do you have raw data for these as well, like CSVs? " | Read more » | about 8 years ago | |||
| zega | "I will start with long CFL tubes that i just did... Unfortunately i don't have bare tube (diffuser in front/office lights) that might play same ro..." | Read more » | about 8 years ago | |||
| cfastie | "Hi Robert, In this note and comments we were lamenting the lack of replicate spectra of CFL lamps to confirm the information at the Wikipedia page...." | Read more » | about 8 years ago | |||
| warren | "Oh thanks! I believe, but Chris may correct me, that it'd be sufficient to measure a cold long tube fluorescent lamp and compare it to pretty much ..." | Read more » | about 8 years ago | |||
| zega | "@warren , @cfastie I see i'm kinda late to the party, i can offer source verification (you can ship CFL source to me) with 3rd party device, Ocean..." | Read more » | about 8 years ago | |||
| warren | "The intensity is not an absolute measure - just a proportion of the dynamic range of the camera sensor. There are a few approaches to correcting fo..." | Read more » | about 8 years ago | |||
| sarahcm | "Of course, please feel free to change it; I can't seem to figure out how. Also, one last question; in addition to the percentage of intensity, is ..." | Read more » | about 8 years ago | |||
| warren | "Also, would you mind renaming this question "calibration error" or something similarly descriptive? I could also do it for you, if you like (I'm an..." | Read more » | about 8 years ago | |||
| warren | "You know what, I believe this was because there's a "(" in the title. Yes -- I was able to upload and calibrate a version which I'd renamed withou..." | Read more » | about 8 years ago | |||
| warren | "Oh sorry, I didn't see that -- will check the calibration now. " | Read more » | about 8 years ago |