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 | ||
|---|---|---|---|---|---|
| troyb | "Thanks very much for the prompt and numerous replies. I think they add up to an answer. There is a small difference in the intensity of the calibr..." | Read more » | almost 6 years ago | |||
| troyb | "Our spectrometer is pretty amazing. Your comments are right on, I certainly recommend avoiding clipping (the warning in SpectralWorkbench works rea..." | Read more » | almost 6 years ago | |||
| stoft | "On using only raw data (eg. using the CSV 'avg' data): Yes, you could implement a simple linear mapping of pixel:nm with the data from a CFL spectr..." | Read more » | almost 6 years ago | |||
| Pushpaw | "Bit late to comment I know, but what are you saying won't match? You seem to be saying the OP is comparing a white LED spectrum captured with the P..." | Read more » | almost 6 years ago | |||
| stoft | "I'll admit I'm not following your comparisons -- but a few thoughts anyway in case they will help. The second plot at least shows a CFL spectra; al..." | Read more » | almost 6 years ago | |||
| troyb | "So, to clarify: what I'm saying is that there seem to mathematical artefacts in the calibrated intensity values. This means that at least for expor..." | Read more » | almost 6 years ago | |||
| stoft | "Also, 5 - Use 'absolute' measurement values when mathematically comparing amplitude of spectra -- where the only change between plots is the experi..." | Read more » | almost 6 years ago | |||
| stoft | "Ok, visualizing the spectra helps. 1 - The calibration (wavelength calibration using a CFL source) does not require an amplitude change (though SWB..." | Read more » | almost 6 years ago | |||
| troyb | "Also, I didn't save any spectra with saturated channels that I recall, but the recent spectrum https://spectralworkbench.org/spectrums/137643 illus..." | Read more » | almost 6 years ago | |||
| troyb | "Ah, the table makes the values hard to see. Note for instance that a raw value of 10 scales to 7.65 while a raw values of 23, 24 and 25 scales to 2..." | Read more » | almost 6 years ago | |||
| stoft | "Could not find the actual spectra from the info provided. How about an explicit link or post the graphic? " | Read more » | almost 6 years ago | |||
| conghau115599 | "thank for sharing " | Read more » | almost 6 years ago | |||
| SarahC | "Thanks for showing how you checked through it. I'll re-upload it after work. I love your site, very polished. =D I wonder what I did wrong to get..." | Read more » | almost 6 years ago | |||
| warren | "Hm, i wonder what's going on -- I do think it's a bug. I see both have an actual image esp when i look at https://spectralworkbench.org/profile/sar..." | Read more » | almost 6 years ago | |||
| SarahC | "I found there's a manual calibration URL I could use: https://spectralworkbench.org/spectrums/calibrate/136374?x1=165&w1=546&x2=189&w2..." | Read more » | almost 6 years ago | |||
| SarahC | "I found there's a manual calibration URL I could use: https://spectralworkbench.org/spectrums/calibrate/136374?x1=165&w1=546&x2=189&w2..." | Read more » | almost 6 years ago | |||
| warren | "Oh, hmm, I'm not familiar with that; can you post a picture and/or a link? Thanks! " | Read more » | almost 6 years ago | |||
| SarahC | "I have an i-phos hobby model! 0.5mm slit, hand held near the light. it's a great little machine. The light though - it's streaking my blue bar... " | Read more » | almost 6 years ago | |||
| warren | "Hi, what kind of webcam are you using? And what width slit? I think higher resolution may help more than another light, but that's a guess. You spe..." | Read more » | almost 6 years ago | |||
| SarahC | "Thanks icarito! xx " | Read more » | almost 6 years ago | |||
| silvi_ap51 | "Hi, thanks a lot for your concern, i hope we can work with this site as soon as possible :) " | Read more » | almost 6 years ago | |||
| icarito | "Hi, I've reloaded the database data into a new container. I'll keep an eye on it and have enabled logging for slow queries. It may be that the data..." | Read more » | almost 6 years ago | |||
| icarito | "Hi, in fact the database was failing so I'm re-creating it and moving it into a new container. Currently the site is down, expecting to be back in ..." | Read more » | almost 6 years ago | |||
| icarito | "Hi, I'm the sysadmin for Publiclab and I'm looking thru the issue which is affecting our database. I will update you as soon as I have a definitive..." | Read more » | almost 6 years ago |