This wiki page is a guide to use the Differential Image Motion Sensor Using Multiapertures (DIMSUM) instrumentation that was installed to Aux Tel between December 6th and 16th. This wiki page is a guide to use the Differential Image Motion Sensor Using Multiapertures (DIMSUM) instrumentation that was installed to Aux Tel between December 6th and 16th. I am currently writing this as a wiki page to be able to get feedback during the process of documentation. Once everything is finalized I can create a pdf file if requested.
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Ordered parts for more DIMSUMS: two monochrome Canon 5D IV from MaxMax. More Xenon flash sources from Hamamatsu, and this from B&H
Jan 27 2024, CWS
We need to do better coupling light into fibers. Thor labs sells and 1:2, 1:4 and 1:7 fibers with 200,400, 600 micron cores.
The 1:2 version comes in 1mm core as well.
Let's assume we want the final emitting end to be smallish fiber, 200 microns.
If it's a 1:4 bundle then we need to feed it with a larger one, at least 400. 600 would be even better.
getting a uniform light distribution on output face would benefit from a mode scrambler.
So how about 1:4 plugged into the light source, largest possible is 600 micron fiber. That a diameter of about 1.2mm, and light into each should be the same.
Each of those feeds 1:4 200 micron bundle. That gives us 16 sources, each 200 microns diameter.
So we should order one 600 micron 1:4 and four 200 micron 1:4's.
The SMA threads are 1/4-36. Digikey sells them, part number A104989-ND. Bought 100 of them.
Asked Helen to place this order since credit card failed.
Jan 27 2024, CWS
We need to do better coupling light into fibers. Thor labs sells and 1:2, 1:4 and 1:7 fibers with 200,400, 600 micron cores.
The 1:2 version comes in 1mm core as well.
Let's assume we want the final emitting end to be smallish fiber, 200 microns.
If it's a 1:4 bundle then we need to feed it with a larger one, at least 400. 600 would be even better.
getting a uniform light distribution on output face would benefit from a mode scrambler.
So how about 1:4 plugged into the light source, largest possible is 600 micron fiber. That a diameter of about 1.2mm, and light into each should be the same.
Each of those feeds 1:4 200 micron bundle. That gives us 16 sources, each 200 microns diameter.
So we should order one 600 micron 1:4 and four 200 micron 1:4's.
The SMA threads are 1/4-36. Digikey sells them, part number A104989-ND. Bought 100 of them.
Asked Helen to place this order since credit card failed.
Feb 14 2024 Pachon, Stubbs
Changed optical fiber configuration to have Xenon source feed attenuator module to 600- micron 1:4 fiber then 4 of 200 micron 1:4 bundles. This gives us 16 sources 200 microns in diameter.
I did find one fiber that was flopping/loose in the pegboard, that was presumably the one that showed anomalous behavior in analysis done Feb 2024 by Ali K.
Checked using headlamp that all fibers look comparable.
When running remotely on data collection using gphoto-2 to interrogate aperture worked fine, after power cycling the camera.
But the
./CommunicateTrial.sh
script failed.