March 12, 2022
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At 808 nm:
| angle (degrees) | Rp | Rs |
|---|---|---|
| 0 | 0.041365 | 0.041365 |
| 5 | 0.040948 | 0.041784 |
| 10 | 0.039693 | 0.043069 |
| 15 | 0.037593 | 0.045301 |
| 20 | 0.034640 | 0.048630 |
If angle of incidence is 10 degrees, reflected beam rotates by 20 degrees. If beam of diameter D rotates by theta, distance it must travel to not have incident and reflected overlap obeys tan(theta)=D/L so L/D=1/tan(theta)
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Also bought wedges on eBay, > 2 inches in size.
Feb 2023 Design
HgAr source, 12V 3W so around 500mA@12V:
Beam source
either tunable laser or else modulated photodiodes. If we want a 10 micron spot at f/12, need to inject the input beam at slow f/# as well.
a 50 micron fiber needs to be 12*50 = 600 microns away from a pinhole to generate an f/12 beam.
References
Large optical wedge vendor, example: https://www.precisionoptical.com/precision-optics/optical-flats/unmounted-reference-flat/
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