> From: JOHN DUGGAN <john.duggan10@xxxxxxxxxxxxxx>
>
> Does anyone have info on Leiberkulm reflectors regarding the radius of the
> reflecting surface. It should be straightforward to machine? in white plastic
> or aluminium given this dimension. failing this I will experiment with the
> curved bases of drinks cans or bottled gas containers etc.
This guy has done all the math and will 3-D print them for you for under ten
bucks:
Description of the design process and results:
https://thebilder.wordpress.com/2014/03/25/first-tests-of-3d-printed-lieberkuhn-reflectors/
Order page:
https://www.shapeways.com/product/R9NYJJUE6/lieberkuhn-reflector-49mm-lens-diameter-f-20mm?optionId=57933798&li=marketplace
Damn evilBay sale tapped me out for a while, but I’m seriously considering
getting one of these, rather than cobbling something together.
He has put a lot of work into getting the proper parabolic shape and focal
length. He even sells a set of four for Canon 62mm thread-size macro lens, for
use at four different reproduction ratios. But I’m thinking just about any old
bit of white stuff you can put there will work Pretty Durn Well(TM).
Jan
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