Interferometer notes
I picked up a HP 10706B interferometer module. The 10706B is a michelson interferometer. Michelson interferometers use the interference between a reference and measurement beam in order to measure distances of a few hundred nanometers.
The image below from the HP docs shows the path of the reference and measurement beams:
Anyway, I started playing around with it. Initially just to understand the beam path and see if I could see the beam reflected off the measurement mirror. I setup the laser and interferometer as shown above and could see the reflected beam. As expected the reflected beam dimmed when I occluded the mirror.
In this configuration it’s very unlikely that I’d be able to see the reference and measurement beams interfering. So I’ll be trying everything out on the anti-vibration table next.
Some other random pics:
Corner Cube:
Krackdoos (Cracklebox) rev2
For this version I’ve removed the headphone socket, switch and LED. Also modified the layout and added a logo to the silkscreen. The plan is to use the boards in a workshop at Yeovil Hackerspace. I’ve sent the design out to fab as an initial test but may make more revisions.
Kicad files and gerbers: kraakdoos2.zip
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