Reports until 15:00, Friday 05 July 2024
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Erin McGee - posted 15:00, Friday 05 July 2024 - last comment - 17:09, Monday 08 July 2024(11684)
Shack-Hartman Wavefront Sensor Setup
[Erin, Daniel] Worked on developing a setup for using a Shack-Hartman Wavefront Sensor to image mirrors more easily. Light would pass through a polarizing beam splitter, then to a quarter wave plate, reflect off of the mirror we are sensing, pass through the QWP again for a total polarization shift of 90 degrees and then through the beam splitter again. It will then be deflected into a converging lens (f=50mm) as it is in the setup attached. Then the light will pass into the mounted lense array (MLA) and then to the camera. There will also be a lens tube to give about an inch of space between the array and the camera sensor. The wavefront sensor is an MLA with a square grid of smaller lenses that measure the intensity, which is how the wavefront is reconstructed. Mounted Lens Array for sensing the wavefront (Thorlabs MLA300-14AR-M - Ø1"): https://www.thorlabs.com/thorproduct.cfm?partnumber=MLA300-14AR-M (lens, tube, and camera we already have)
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Daniel Grass - 22:39, Saturday 06 July 2024 (11714)

Shack Hartmann Wavefront Sensor Materials Requirements:

PBS, 1”, 775 nm: PBS25-780 or PBS255 (same price, 2nd broadband 700 nm to 1300 nm)

KM100 PM (PBS mount)

PM4 (clamping arm for PBS)

2.5” Tall, 1” diameter pedestal post with #8 tap and 0.25” spacer

Clamp

 

Lambda: WPOM-25.4-20.0CQ-0-4-780

RSP1 (wave plate holder)

1/2” post (or 3.6” of 1” diameter post and spacers)

1/2 post base

 

PY005 + PY005A

*RS05P

Note: Optic Center at 4.152” (1.44” stage height and Mount to Center of Optic 2.2125”)

 

*50 mm lens (LA1131-B-ML)

LMR1 (SM1 fixed mount)

1/2” post

1/2 post base

 

775 nm camera

SM1A9 (converts internal C-mount to internal SM1)

SM1L10 (SM1 lens tube, 1” long)

SM1RR (2)

*MLA300-14AR-M (microlens array, f = 14.2 mm, 9 mm square window)

 

I believe we have everything except the microlens array, 0.5" pedestal posts, and maybe the lens. I will check no later than Monday.

Daniel Grass - 17:09, Monday 08 July 2024 (11718)

We have everything except the lens tube, lens tube converter, micro lens array, and 50 mm lens.

I realized the SM1A39 and SM1M10, both of which we don't have, will be an easier setup.