From: Greg Schmitz (gws1@columbia.edu)
Date: 04/10/03-05:18:45 PM Z
I've always thought it would be possible to build a UV enlarger using
mirrors. You might recall that the first microscopes did not have
lenses; as is also the case with some specialized microscopes now.
The advantage of using mirrors is obvious. I don't know what the
issues would be with regard to aberrations. It's just one of those
things I have to get to one of these days.
Best -greg schmitz <gws1@columbia.edu>
On Thu, 10 Apr 2003, John Cremati wrote:
>
>
> I would expect it to be very difficult unless you have access to
> suitable glass material, lens design, and manufacturing instruments.
> Photographic optics including enlarging lenses do not consider to
> minimize aberrations in the UV range. In addition, usual crown and
> flint glasses do not transmit UV light of shorter wavelengths very
> well, especially if many elements are used.
>
> Ryuji
> Cambridge, MA
>
>
> Dig thru the Archives. Normal glass filters UV. There was a discussion on El Nikors enlarging lenses will transmit the necessary UV range as they are made of a special glass..... One of the List members tested it on a UV spectroscope and found it to be true.. Also it was found the" White glass " optical also transmits UV and is fairly inexpensive. White glass would be good for the film carriers ect. I had all of this info stored and my computer crashed and I lost it all...
> John Cremati
>
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