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 high(est) resolution lenses
Auteur: Dr Klaus Schmitt 
Date:   29-01-2005 13:53

I'm currently looking for some info on high(est) resolution lenses for enlarging and taking, especially macro and repro/copy. Idea is to include that into my Database www.macrolenses.de

The site has been re-designed and inludes now "Special lenses", such as "monster lumen lenses", microlithography lenses, lenses fro IR and UV photography, special enlarger lenses like Apo EL Nikkors etc.

Any comments & contributions more than welcome!

Regards

Dr Klaus Schmitt
www.macrolenses.de


 
 Re: high(est) resolution lenses
Auteur: Emmanuel Bigler 
Date:   29-01-2005 18:12

Excellent idea, Dr Schmitt and thanks for posting your anouncement on galerie-photo.

I have in mind two Zeiss lenses for photolithography currently in use at our photomask fabrication facility at the university in Besançon. The machinery is californian but lenses are Zeiss. Unfortunately the lenses are deeply recessed inside the machine and not accessible, so I've never seen the glass, only the .8 micron linewidths generated by the photorepeater lens;-);-)

The first lens is a 1:10 demagnifier for the pattern generator, this lens demagnifies a rotating slit, max size 15x15mm, min size 4x4mm, to generate a photomask or a 10x reticle, smallest linewidth = 4 micron. There was an optional lens working at 1:20 with the same working distance allowing to go down to 2 microns.
The second lens is a photorepeater lens, 1:10 ratio, object field : 10x10 cm on 5"x5" reticles (127x127mm) ; image field : 1x1 cm resolution .8 micron linewidth, 0?7 at the centre. Wavelength 435 nm (mercury arc lamp). If I find the name and specs of those special beasts which have never seen daylight ;-) I'll send the info to you.

I have in mind another lens by Cerco for photomask fabrication from a paper drawing operating in green visible light ; the lens has been discontinued for a long time, Cerco is now a trade mark of another French company and still offers special lenses, an Internet search with "cerco lens" as keywords will yield the proper company name and web page.

Probably Henri Gaud might have some French-made apo lenses that could be added in your database as well.

And since you mention "monster lumen lenses", no doubt that the famous Carl Zeiss Makro-Q Gigantar described in the "Zeiss Compendium" by Charles Barringer & Marc James Small deserves a very special place in your database ;-);-)


 
 Re: high(est) resolution lenses
Auteur: Dr Klaus Schmitt 
Date:   30-01-2005 10:45

Thank you Prof Bigler!

I gladly welcome all you contributions. Should you like to send me some information, best would be to use info@_nospam_macrolenses.de (and please remove the _nospam_ before).

I am aware of the Cerco lenses, esp. also for UV light and know this company now part of the EADS group of companies, but I never had one of those in my hands,

The "Gigantar" you mentioned will be inserted on the next update on April 1st 2005, since I think this will be the appropriate date and Charlie / Marc surely will agree on that.

Best Regards

K Schmitt




 
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