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We have K9 glass, according to http://www.ygofg.com/products/Colorless_Filter_Glass/119.htm,
| wavelength (µm) | index of refraction (n) |
| 0.4047 | 1.530 |
| 0.4800 | 1.523 |
| 0.5461 | 1.519 |
| 0.6328 | 1.515 |
| 0.8521 | 1.510 |
| 1.0600 | 1.507 |
| 1.5300 | 1.501 |
| 1.9700 | 1.495 |
| 2.3250 | 1.489 |
Note, if we assume f = 700 mm at 546 nm, this means at 405 nm f = 685 mm and at 1.5 um f = 726 mm.
Calculated the expected aperture diameter needed to capture a percentage of beam power as a function of wavelength, assuming the focal plane of the sensor is set at 700 mm. Calculations here: Chromatic Aberration.ipynb
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