The filter wheel on #JWST's MIRI (mid-infrared instrument):
@porsupah The twitter thread on this thing is really nice https://twitter.com/mpi_astro/status/1481379175709786115
@porsupah Weird that the filters match the mirror shape so precisely. I would've expected round filters to be as good.
@TerryHancock Indeed! I'd /guess/ it's to do with not wanting any "stray" IR energy entering, only that actually, definitely coming from the mirrors.
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