DIY High Resolution Spectrometer (2018)

Anyone know of active DIY higher-er resolution spectrometer projects using image sensors? Is it possible to create a sharp image of 940-1240nm 3000 pixels across with less then $3000 in parts? I want to learn how to make a broader(uv to ir) but crappy-er version of this: <a href="https:&#x2F;&#x2F;solarsystem.nasa.gov&#x2F;resources&#x2F;390&#x2F;the-solar-spectrum&#x2F;" rel="nofollow">https:&#x2F;&#x2F;solarsystem.nasa.gov&#x2F;resources&#x2F;390&#x2F;the-solar-spectru...</a>

almost completely off topic but btw the o in spectrometer, speedometer, worldometer, whatever is called an interfix. you&#x27;ve heard of suffixes and prefixes, well interfixes unlike those two have no meaning other than to join two root words (as in words that can&#x27;t be used as suffixes or prefixes).

I&#x27;ve been wanting a cheap, no-cloud raman spectrometer in my pocket for a while now.<p>Like something that can plug into something as universal as an audio jack on a phone, reflecting the laser back into its built in camera. I know there was some options out there that were cloud-based but I want one simply lets us interpret the samples and their readings ourselves with lab device quality output.<p>DIY stuff like this is ultra cool but it&#x27;s like miniaturize-able for sure, and something you can run with open source software.<p>I know it&#x27;s around the corner, I&#x27;ve read about it. It&#x27;s like the next killer feature for new cell phones already. [1] Making it open source so some corporations who are doing cloudy things with your spectrometer data is definitely an international research security imperative.<p>[1] <a href="https:&#x2F;&#x2F;aip.scitation.org&#x2F;doi&#x2F;10.1063&#x2F;5.0046281" rel="nofollow">https:&#x2F;&#x2F;aip.scitation.org&#x2F;doi&#x2F;10.1063&#x2F;5.0046281</a>

Really cool! I wonder if this could be combined with a digital micromirror and compressed sensing to inexpensively recover both spectral and spatial resolution. (see: &quot;single pixel camera&quot;)

I guess it makes sense if you already have a DSLR, but you can get a proper used spectrometer for about $1k which is surely cheaper and better than a DSLR.

How does this compare to Les&#x27; RPI photospectrometer?<p><a href="https:&#x2F;&#x2F;www.hackster.io&#x2F;news&#x2F;les-wright-s-diy-raspberry-pi-spectrometer-064422bae529" rel="nofollow">https:&#x2F;&#x2F;www.hackster.io&#x2F;news&#x2F;les-wright-s-diy-raspberry-pi-s...</a><p>Does it just have a much larger spectrum?

A lower resolution but easier-to-construct variant: <a href="http:&#x2F;&#x2F;scheeline.scs.illinois.edu&#x2F;~asweb&#x2F;CPS&#x2F;" rel="nofollow">http:&#x2F;&#x2F;scheeline.scs.illinois.edu&#x2F;~asweb&#x2F;CPS&#x2F;</a>

Interesting. I garden and have thought it would be cool to build a spectrometer that I could feed soil samples and get NPK and other nutrient levels quickly without chemical processes.

The pdf mentions using a cfl to calibrate the position -&gt; wavelength mapping, but wouldn&#x27;t the peaks depend on the particular phosphors used for that lamp?

... and soon a small x-ray spectrometer? (even though this is illegal in most countries since x-rays are really dangerous).

Not the same thing, but I’d love to see an open-source XRF gun.