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First Serious Spectral Test Setup

A project log for ramanPi - Raman Spectrometer

The open source 3D Printable Raman Spectrometer using a RaspberryPi and easy to find off the shelf components..

flcfl@C@ 08/15/2014 at 08:181 Comment

So, in the process of designing the spectrometer portion of this system.. I want some real world examples before going out on a limb and trying full scale right off the bat...  In this spirit, I have designed some small throwaway test stands for the optics that will allow me to arrange them in whatever configuration I want.  Each stand has a similar base which can freely rotate, and has three adjustment screws which will allow me to make minor adjustments to the mirrors, etc..  For people building their own version, you'll probably not need to print or make these... this is mostly for my testing for the design..

Some of the mounts are still printing right now, but here is what I have so far...

This is the back view of the collimating mirror stand..  As you can see, it swivels and there are three screws to allow for directional adjustment...

And the front of the collimating mirror stand...

The diffraction grating stand..

The focusing mirror stand... A little larger because this mirror is 50mm in diameter...

Here's the back of the mount for the linear CCD...  The PCBoard just slides into it...

And a front shot (with no CCD in the socket at the moment)...  

I'll post an update when I have the rest of the objects printer... for now, here's the renderings...

Here is the front end of the stand that holds the light source...For this test I am using an LED flashlight since I am only trying to align and test everything...I am just going for a regular spectra like a normal spectrometer so it won't include the laser until my next tests when I go for the raman spectra...

The front half of this also has the verticle support for the entrance slit... which in this test will be two razor blades screwed to the stand to allow for adjustable width.. 

And the rear half of the light stand...

Hopefull all goes well, and I will post very soon some photos with results!  I'll be capturing the spectra hopefully with both a camera..(I might use my gopro) and the oscilloscope..!

As always, the files for these objects are all located in the gitHub repo!

Discussions

zakqwy wrote 08/15/2014 at 11:53 point
It's great to see the 3D printed parts coming together. Looking forward to the first test!

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