4 ms·
Interestingly, you can DIY that too: http://www.dr-iguana.com/prj_FlatPackMirror/index.html http://www.dr-iguana.com/prj_FlatPackMirror/index.html And I think
by throwaway9d0291 6y ago
Interestingly, you can DIY that too: http://www.dr-iguana.com/prj_FlatPackMirror/index.html http://www.dr-iguana.com/prj_FlatPackMirror/index.html
And I think they really could be a good option. Unlike the lenses, there would be no chromatic aberration with a reflector, right? Plus, you can set the focal length to whatever you want (taking practicality into account of course).
I might have to try it out...
- hinkley 6y agoIf you could find two parabolic mirrors with a focal length difference of less than a couple of inches, I suspect you could take the middle of the short focus one and the outside of the longer focus one and stack them concentrically, to get a flatter dish. Honestly for this use case, just sliced and stacked a single dish would give you mostly-collimated light, right? If you put this behind a mild diffuser you could probably still trick your brain unto thinking it's sunlight coming through the curtains.