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sixela
Postmaster
Reged: 12/23/04
Posts: 11499
Loc: Boechout, Belgium
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Re: Diffraction pattern from threaded rod?
10/14/09 03:33 AM
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Threaded rods are thick.
How the energy is spread is the least of your worries: your worry is that there *is* a lot of energy spread, at least compared to what a thin vane spreads.
I haven't computed the point spread function, but my guess is you'll have six main spikes with some secondary spikes aligning with the threads on the rods.
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400mm f/4.46 self made Dobsonian on Tom Osypowski equatorial platform
Orion Starblast (114mm f/4 reflector, Alt/Az)
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