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Activity grid

Purpose Category Status Author Time Difficulty Replications
Detection of Added Sugar in Red Wine Using Visual Light Spectroscopy - - @ygzstc - - 0 replications: Try it »
Build a papercraft spectrometer for your phone -- version 2.0 - - @warren - - 2 replications: Try it »
Detecting Pesticides in Organic and Conventional Raspberries using Open Source Instrumentation - - @silverhammer - hard 0 replications: Try it »
Flame testing metal salts observe - @kgradow1 3h medium 0 replications: Try it »
Multi parameter analysis using a DIY Spectrometer - - @Frikkie - - 0 replications: Try it »
Calibrate your spectrometer in Spectral Workbench verify review-me @warren 15m easy 5 replications: Try it »
Detection of Olive Oil Adulteration (with Peanut Oil) Using Visual Light Spectroscopy - - @ygzstc 10h medium 0 replications: Try it »
PLab 3 Gain Correction - - @stoft - - 0 replications: Try it »
Tracking Plant Health Using Visible and Infrared Light -- Initial Experiences at an Arts High School - - @Travis - - 0 replications: Try it »
Desktop Spectrometry Starter Kit 3.0 Assembly Instructions build complete @abdul 45min introductory 1 replications: Try it »
Preparing a DVD-R to act as a diffraction grating - - @MrBumper - - 1 replications: Try it »
Assemble a DIY Papercraft Spectrometer build complete @abdul 10min introductory 3 replications: Try it »
Classroom Flame Spectroscopy - - @straylight - - 0 replications: Try it »
Using the Spectroscope for Analysis of Concentration (Beer's Law) test-limits - @straylight 3h medium 0 replications: Try it »
Scan and compare different gases (in discharge tubes, like neon) using a DIY spectrometer - - @warren - - 27 replications: Try it »
Water Quality Measurements with Optical Spectroscopy - under-development @philippg - - 0 replications: Try it »
Fat percent in milk - - @wagnerc4 - - 0 replications: Try it »
Make a narrow slit for a DIY spectrometer out of paper - - @warren - - 0 replications: Try it »
Revised 3D printable mini spectrometer - - @B-winters - - 0 replications: Try it »
Testing the Oil Testing Kit: identifying a "somewhat unknown" sample - - @warren - - 0 replications: Try it »
Light Amber - - @cfastie - - 0 replications: Try it »
Lycopene - - @cfastie - - 0 replications: Try it »
Spectrometer 3.0 Cuvette Add-on - - @programmer1200 - - 0 replications: Try it »
DIY-spectrometer episode 2 (using LEGO) - - @TakeshiMatsumoto - - 0 replications: Try it »
Fraunhofer - - @cfastie 30m easy 1 replications: Try it »
Draft: How to intergrate spectral data geometrically - - @madafe - - 0 replications: Try it »
WIP Raspberry Pi Spectrometry automation - - @jaksch - - 0 replications: Try it »
Importing spectra from NIST and WebMineral.com to Spectral Workbench - - @warren - - 0 replications: Try it »
Draft: Collect a sample for laboratory analysis - - @warren - - 0 replications: Try it »
Setup for UV Testing with Specrtrometer - - @JoshMc - - 0 replications: Try it »
Filtered tap H2O vs unfiltered tap H2O spectral graph comparison - - @Suiris - - 0 replications: Try it »
Introduction to Spectrometry (& Building a Spectrometer!) Lesson - - @mimiss - - 0 replications: Try it »
Attempt at Quantitative Analysis for Desktop Spectrometer - - @ben.alley43 - - 0 replications: Try it »
See the Fraunhofer absorption lines in sunlight verify draft @warren 1h easy 4 replications: Try it »
Noise by colour - - @viechdokter - - 0 replications: Try it »
Stress-testing the Desktop Spectrometry Starter Kit test-limits in-progress @warren 1h medium 0 replications: Try it »

Activities should include a materials list, costs and a step-by-step guide to construction with photos. Learn what makes a good activity here.


Upgrade grid

Purpose Category Status Author Time Difficulty Builds
Ebert - - @cfastie - - 0 builds: Try it »
OTK Proto3 - - @stoft - - 0 builds: Try it »
Stability upgrade mockup for PLab Spectrometer 3.0 build review-me @stoft 1h easy 1 builds: Try it »
PLab 3 Spectrometer Upgrade Prototype - - @stoft - - 0 builds: Try it »
Some Suggestions for Spectrometer v3.0 and Oil Testing Kit (OTK) Attachment - - @ygzstc - - 0 builds: Try it »
3D printed mini spectrometer - - @rthalman - - 1 builds: Try it »
Constructing a Desktop Spectrometer with no Wood, and no Velcro build in-progress @abdul 1h easy 0 builds: Try it »
Prototype of easy-to-build rigid spectrometer housing - under-development @warren 3h easy 0 builds: Try it »
Reduce light inside foldable PL spectrometer - - @xose - - 0 builds: Try it »
Introducing a new spectrometer design - "The Spectrotube" - - @El_Mar - - 0 builds: Try it »
Reduce interior reflections in your spectrometer with black ink build review-me @warren 10m easy 2 builds: Try it »
Camera Focus IR Filter Removal - - @stef - - 0 builds: Try it »
How to do upgrade Desktop Spectrometer Kit 2.0 to the version 3.0 - in-progress @pablo - - 0 builds: Try it »
Ongoing design of compact cuvette frame - under-development @warren 5h medium 0 builds: Try it »
Spectrometer Light Tight Cover Build build - @stef 30m easy 0 builds: Try it »
Laser-cut the Desktop Spectrometry Kit v3 box - - @warren - - 0 builds: Try it »
PLab-3 Proto Slit Upgrade - - @stoft - - 0 builds: Try it »
Printable 3D Spectometer - - @mdiego2798 - - 1 builds: Try it »
All Paper-n-Tape Mock-Up Upgrade of PLab 3 Spectrometer build - @stoft - - 0 builds: Try it »
Build Instructions For The DH 4.0 v4 Spectrometer - - @dhaffnersr - - 0 builds: Try it »
A more compact spectrometer - - @cristoforetti - - 0 builds: Try it »
Spectrometer 3.0 Upgrades - - @programmer1200 - - 0 builds: Try it »
An evolution of the Spectrometer for 3D printing - - @ajy00 - - 0 builds: Try it »


More generic table of questions:

Title Author Updated Likes Comments
How to build affordable DIY Near Infra red Spectrometer for analyzing wavelength range 1000nm to 1800nm ? @apk87 about 2 years ago 2
grating calibration @cure828282 over 2 years ago 1
How do I...use luminescence with the spectrometer? @Ag8n over 2 years ago 8
¿como se que mi espectro de una solución sigue la ley de beer? @edithcaballero19t almost 3 years ago 1
What are the best settings for a Camera? @amayas about 3 years ago 0
Is there an automatic filter on phone camera? @msuphysicsformcb over 3 years ago 1
Substitute diffraction grating for DVD? @msuphysicsformcb over 3 years ago 4
can i use a spectrometer to sense food wastes and use an arduino to make it light a led accordingly? @tasneim3mon3em over 3 years ago 1
What light sources might I use to calibrate my spectrometer if I don’t have a CFL available? @mimiss almost 4 years ago 8
Problem whit workbench spectra. Unable to manipulate(work) whit any image @damian_orovitz almost 4 years ago 1
Reading the individual pixel data from a piCamera sensor sans-lens? @wln215 over 4 years ago 0
I just gotten my newly purchased Infragram Pi Camera, my pi.local is blank and pi.local/Cam keeps popping up message "Error in RaspiMJPEG" hence I do not get any live video feed. Anyone can help? @willieong over 4 years ago 1
Can you give me mesure for spectrum? Thank you. @janajockovic47 almost 5 years ago 7
Lego Spectrometer cardboard cut out template? @aga over 5 years ago 2
Standalone Spectrometry software & uploading JPG or PNG spectra @lach_myers over 5 years ago 5
Dark images, can't get spectrometer to work @Tomas0413 almost 6 years ago 55
Anyone working on software to calculate CRI of LED light sources? @FineArtLight almost 6 years ago 0
Can I get spatial resolution by making multiple parallel slits? @dgidon about 6 years ago 3
Can we use this DIY spectrometer device to quantify colored dissolved organic matter (CDOM) of water? @jacksch about 6 years ago 3
How do I start? i made the spectrometer 3.0. I do not see instructions? I had trouble getting my computer to use it as the camera. Is there any help available? Thanks. @RPiach over 6 years ago 2
orientation of slit vs that of diffraction grating @wlkwong about 7 years ago 2
Well done. What method do you use to enhance the output? @HappyS5 over 7 years ago 0
Photoreactive purple dye: can it block wavelengths longer than green? @axman over 7 years ago 2
Instuctions say to go to publiclab.org/n/11533 to watcha video. It isn't there @dcchallener over 7 years ago 2


Public Lab near infrared imaging project for http://publiclab.org/wiki/multispectral-imaging

The Public Lab near infrared imaging project is an open source community effort to modify consumer cameras to capture near infrared imagery for a range of purposes, including plant health. All open or accessible near infrared imaging hardware and software efforts are welcome here!

Join in by:

  • Reading about goals and asking great questions
  • Converting a camera using one of our starter kits
  • Trying (and critiquing) our community-made how-to guides
  • Posting your own how-to guides and mods
  • Building on others’ work; hack and remix the kits to refine and expand them
  • (proposed?) Submit your improvements for inclusion in an upcoming starter kit release or add-on
  • (proposed?) Serve on a Research Review Group for a 3 month period

Experiments

This is a list of community-generated guides for experiments using your near-infrared imaging setup (either a camera you converted yourself with a filter pack, a ready-made near-infrared camera, or double camera setup) toward specific applications. Some may be more reproduced -- or reproducible -- than others. Try them out to build your skills, and help improve them by leaving comments.

Purpose Author Time Difficulty Status Goal
White-balance your camera; watch video @cfastie X m X 0 replications Try It X replications
Classroom activity to understand, capture, and analyze near-infrared images @mathew & Amanda Fisher 2.5 h X X replications Try It X replications
Compare cultivation methods in your garden @liz X m X 1 replications Try It X replications
Observing leaf pigments 1 @cfastie X m X 0 replications Try It X replications
Observing leaf pigments 2 @cfastie X m X X replications Try It X replications
Observing leaf pigments 3 @cfastie X m X X replications Try It X replications
Observing root pigments @cfastie X m X X replications Try It X replications
Observing fruit pigments (lycopene) @cfastie X m X X replications Try It X replications
Observing insect pigments (hornworms) @cfastie X m X X replications Try It X replications
Observing crop health 1 @cfastie X m X X replications Try It X replications
Observing crop health 2 @cfastie X m X X replications Try It X replications
Observing atmospheric refraction @cfastie X m X X replications Try It X replications
Observing atmospheric scattering @cfastie X m X X replications Try It X replications
Observing NIR absorption by water @cfastie X m X X replications Try It X replications
Comparing NIR absorption by beverages 1 @cfastie X m X X replications Try It X replications
Comparing NIR absorption by beverages 2 @cfastie X m X X replications Try It X replications
Comparing filters @cfastie X m X X replications Try It X replications

Add your guide here Request a guide

Guides should include a materials list and a step-by-step construction guide with photo documentation. See an example.


Hardware Mods

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:

Title | Author | Time | Difficulty | Status (?) | Goal ----------|----------|----------|----------|----------|----------|

Add your hardware modification here Request a hardware modification

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 near-infrared imaging -- if you’ve developed another open source design you’d like to show others how to construct, post it here!

  • Rasberry Pi NoIR
  • X
  • XX

Choosing a tool / Starter Kits

The question to start with is whether you can capture all the channels you need for your research question with a single converted camera or whether you should use a dual camera rig with one converted camera and one unconverted. That choice plays out in terms of what filter (blue or red) to use for converting your camera.

Public Lab’s Kits initiative offers several starter kits, one with the basic components and instructions for converting your own digital camera to capture near-infrared imagery and a second option -- a readymade lightweight near-infrared camera. The point of the kits is to lower the barrier to capturing your own near-infrared imagery.

  • The Infragram filter pack is our least expensive way to get started with near-infrared imaging, but it does require an afternoon and some technical work to perform the camera conversion yourself. ... etc etc etc

Visit the Infragram DIY filter pack

  • The Infragram point and shoot is a Mobius camera that we worked with a factory to modify. ... etc etc etc

Visit the Infragram Point&Shoot page


Processing near-infrared imagery

Once you take a multispectral photograph with a modified camera, you must post-process it, compositing the infrared and visible data to generate a new image which (if it works) displays healthy, photosynthetically active areas as bright regions. In-depth articles on the technique by Chris Fastie can be found here:


Software

How to process your images: we're working on an easy process to generate composite, infrared + visible images that will reveal new details of plant health and photosynthesis. There are several approaches:


Comparison to commercial tools

Infrared imagery for agricultural and ecological assessment is usually captured from satellites and planes, and the information is used mainly by large farms, vineyards, and academic research projects. For example, see this illustrated PDF from a commercial imagery provider who has been studying the usefulness of infrared imagery and has quotes from farmers who make use of it. There are public sources of infrared photography for the US available through the Department of Agriculture -- NAIP and Vegscape -- but this imagery is not collected when, as often, or at useable scale for individuals who are managing small plots.