3D Printable Raman Probe

This a 100% 3D printed Transmission Raman Probe (low resolution) W/built-in cuvette holder/Raman filter

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The purpose of this project is to expand upon my previous project, since my knowledge has expanded as well, this Raman probe will provide a spectral resolution of approximately 15 cm-1.This project will also be utilizing a radical new design concept inspired by the work of Eduardo H. Montoya R, Aurello Arbildo L. and Oscar R. altuano E. in a scientific journal available here at; I will be utilizing a DSLR Nikon D3400 24.2MP Bluetooth camera as my detector, a reflecting mirror and 1800 mm/gr diffraction grating (holographic) as the spectrometer and two fiber optic cables.

The figure below is the collimation kit for the exit point to the spectrometer, this is pricey @ around $200.00 US but there is NO work around on this, even for a low resolution Raman probe @ 15 cm -1, this and the 2nd figure must be incorporated! 

This is the low-insertion loss cable that attaches to my laser collimation tube assembly that fit to the front face of the probe.

Below is the blueprint drawing, which is also in the build instructions.

I will present far greater details about this project soon...

*note, the 88mm length of the probe is not coincidental, this is the focal length of my laser line coming from the laser collimation tube assembly.

Laser collimation

Both .STL Mesh files section 1A and section 2A are included in this Zip file.

x-zip-compressed - 397.66 kB - 01/22/2018 at 13:26


1) Added 7mm to base of Silver mirror mounting block, purpose was to meet entrance slit center line. 2) Added 12mm to base of diffraction grating mounting block to meet center line of Silver mirror

x-zip-compressed - 4.11 MB - 01/21/2018 at 14:30


STL mesh

All 9 components are contained in this Zip file, Raman probe, rear fiber optic port, front fiber optic port, diffraction grating mount, silver mirror mount, re-focusing lens assembly, Raman spectrometer enclosure W/Lid, Laser collimation tube alignment guide plate.

x-zip-compressed - 4.24 MB - 01/20/2018 at 18:45


Fiber Optic Mounting Block Jan 16

Fiberport coupler FC/PC connector type W/20.18mm Dia. re-focusing coupler on inner backing. Dimensions: 35 X 14 X 35mm .STL file Mesh size grading = 0.1 elements per curvature radius = 5.0 elements per edge = 3.0

x-zip-compressed - 513.18 kB - 01/16/2018 at 21:28


Raman probe Draft 1b REV B stl

Dimensions: 45 X 88 X 40mm .STL file Mesh size grading = 0.1 elements per curvature radius = 5.0 elements per edge = 3.0

x-zip-compressed - 1.73 MB - 01/15/2018 at 13:54


  • 1 × 3D - printed Raman Probe
  • 1 × Raman spectrometer enclosure 3D printable
  • 1 × Reflective mirror mount 55 x 55 x 10 mm 3D printable
  • 1 × Alignment guide mounting plate /Laser collimation tube 3D printable
  • 1 × Front fiber optic mounting port 3D printable

View all 12 components

  • <1mm Beam divergent Laser Collimation Tube Assembly

    David H Haffner Sra day ago 0 comments

    Well this is the final component, my master piece, a <1mm beam divergent laser collimation tube assembly, totally 3D printed! I will put up the prototype of the original one I was using after I post this, because I didn't want to take it apart (really for obvious reasons as you will see,) but this collimation tube has a focal distance of 88mm, (hence the same length of the Raman probe).

    The next panel image shows a transparency rendering depicting the inner workings of the assembly:

    When I have some time, I will construct a build post to put in the build section of this project page. 

  • 3D Renderings of All 9 Components

    David H Haffner Sr3 days ago 0 comments

    1/20/2018 2:38:PM

  • FiberPort Coupler FC/PC 3D printed

    David H Haffner Sr7 days ago 0 comments

    This is the fiber optic coupler port that connects the fiber cable coming from the Raman probe to the spectrometer. The port also has a coupler on the inner backing to  re-focus the incoming beam to it's proper divergence.

    Measurements are: 51mm from re-focusing lens to reflecting mirror, 61.77mm from centerline on reflecting mirror to diffraction grating, 51mm from diffraction grating to centerline on DSLR camera lens.

  • 1st Concept CAD Renderings

    David H Haffner Sr01/14/2018 at 15:07 0 comments

    This is the CAD program I use to build all my 3D parts FreeCad V16, this is the rough draft version, I think I'll have to construct a guide rail system for the rear fiber optic coupler because alignment of the laser line must be 100% perfect as it relates to the fiber optic end point. 

    Even though I have built in the diaphragm laser line guide, I still need a way to make final adjustments at this end.

    I will have the blueprint draft drawings up soon when I have the final version finished. 

View all 4 project logs

  • 1
    3 Views of Homemade Raman Probe

    It is important to understand the concepts of this design by a visual representation of the major aspects before building it. So here before I present detail on exactly how to construct this, I want you to become familar with the individual components 1st, it will make things go a heck of a lot easier in the long run if you fully understand what each part does and why it is there.

  • 2
    View # 2
  • 3
    View # 3

View all 3 instructions

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