Charlie's Bath Interferometer

Bath interferometer designed to be constructed for under $100. I will soon add in the printable XYZ stage. Target audience is amateur telescope makers who want to quantitatively analyze their homemade mirrors using OpenFringe or other free software.

Current suggested partslist (may change over time):

* Thorlabs ME05S-G01 - 1/2" Square Protected Aluminum Mirror, 3.2 mm Thick ($11.30 plus shipping)
* Surplus Shed L2046D - 15mm Coated 50/50 Cube Beamsplitter ($19.00 plus shipping)
* Surplus Shed PL1009 - 12.5mm dia. X 14.2mm FL precision coated BCX lens ($6 plus shipping)
* Red (650nm) Laser Diode ($1-3 depending)

Possible cheap XYZ stages:

* Manual 3d printed based on http://www.thingiverse.com/thing:144838
* DVD player DC 5v linear slider Mini Stepping Motor 2-phase 4-wire Stepper with linear rails e.g. http://r.ebay.com/RTt4zA

Changelog:

* 2017-02-06 1111 Eastern - I'll soon be redesigning this in Fusion 360 aiming for easier printing, construction, and use. :) St