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Lyman Alpha II f1.1/90mm catoptric lens
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PostPosted: Sun Feb 12, 2012 6:21 pm    Post subject: Lyman Alpha II f1.1/90mm catoptric lens Reply with quote
Well, and old collectors rule is "everything comes to him who can wait" - that it would be 16 years when I first learned about that lens and personally had contact with its inventor, I had not really expected.

A few days ago I closed a deal for three prototypes of those lenses, from the heritage of the inventor in California, Richard Nye, who passed a while ago. His company, Nye Optical does not exist anymore. And a big THANKS goes to a friend that helped me getting those lenses!

So, the scientific lenses he invented and custom made were for deep UV recording (capable to work beyond beyond 200nm, especially made to record the 121nm Lyman alpha lines - only in vacuum or nitrogen atmosphere of course), but having no chromatic aberration also in VIS and IR. It is a pure lensless catoptric (reflex) Cassegrain design, which came in f2.8/200mm and f1.1/90mm versions for FF cameras (43mm resp. 25mm image circle, the latter for image intensifiers), focusing from 10 inches to infinity and some adjustable 50mm back focal length.



Well, the three lenses (two 2.8/200mm and one 1.1/90mm) have arrived and of course I was curious to see what they would do.

So here a first visible light shot using that Lyman Alpha f1.1/90mm lens - in one word "craaayyyzzzeehhh"...



DOF at one (1) meter (3ft) is as thin as a razorblade, doughnut shaped bokeh etc. makes it fun.

Inside is an about 25mm (1") thick quartz (ZERODUR most likely) mirror block, front aluminized plus a secondary mirror (most likely made of the same material) held by an adjustable spider in front of that one. Quite built like a small 90mm Cassegrain telescope.

Last edited by kds315* on Fri Oct 26, 2018 3:00 pm; edited 5 times in total


PostPosted: Sun Feb 12, 2012 7:03 pm    Post subject: Reply with quote
can see you big grin from 40km over the hills Smile
congrats


PostPosted: Sun Feb 12, 2012 9:20 pm    Post subject: Re: Lyman Alpha catotric lens Reply with quote
kds315* wrote:
....
So here a first visible light shot using that Lyman Alpha f1.1/90mm lens - in one word "craaayyyzzzeehhh"...



DOF at one (1) meter (3ft) is as thin as a razorblade, doughnut shaped bokeh etc. makes it fun.


*lechtz*
Thats a real photographica porn. I would give and do nearly everything for them Smile
That really looks like a lot of fun! Do they have any kind of aperture?
How do they perform for photographic uses near infinty or with a stacked focus?

Most interensing for me: What was their original use? Are they made some kind of an special atomic emission detector (for example ICP-OES) or a special UV/VIS device,...etc.? Do you know that?


PostPosted: Sun Feb 12, 2012 9:34 pm    Post subject: Reply with quote
It is clear that you are happy with that lenses. Congratulations!
But what to do with them for what they are made????
I am only puzzled.
Does they give an important extension to your possiblities to do UV-photography?


PostPosted: Sun Feb 12, 2012 10:05 pm    Post subject: Reply with quote
very nice. I love that bokeh. unique indeed.

so now you need to get an UV converted body, or do you have one already?
IR, UV (and different wave lengths) are interesting.
I m not sure how many of us are playing with invisible lights.
Very cool.


PostPosted: Sun Feb 12, 2012 10:05 pm    Post subject: Reply with quote
wow... speechless Shocked


PostPosted: Sun Feb 12, 2012 10:19 pm    Post subject: Reply with quote
Quote:
the scientific lenses he invented and custom made were for deep UV recording (capable to work beyond beyond 200nm, especially made to record the 121nm Lyman alpha lines - only in vacuum or nitrogen atmosphere of course), but having no chromatic aberration also in VIS and IR. It is a pure lensless catoptric (reflex) Cassegrain design, which came in f2.8/200mm and f1.1/90mm versions for FF cameras (43mm resp. 25mm image circle, the latter for image intensifiers), focusing from 10 inches to infinity and some adjustable 50mm back focal length.


I knew that. Shocked Wink

I'm also amazed that things such as these, obviously made for scientific research, can be used to make such interesting images. To someone like me who has no understanding of the technicalities it's fascinating.
Thank you for showing us, let's see some more.


PostPosted: Sun Feb 12, 2012 10:57 pm    Post subject: Reply with quote
Well, my intention with them is mainly for my UV work as some here that know me could have guessed.

But it makes for interesting lenses anyway too, even if there is no aperture in them, nor any glass lens...



Here is more : http://www.flickr.com/photos/kds315/sets/72157629157849861/

On my BLOG www.uvir.eu , there is more about that lens, as well as about my UV work
http://photographyoftheinvisibleworld.blogspot.com/2012/02/uv-vis-ir-lyman-alpha-lenses.html


PostPosted: Sun Feb 12, 2012 11:50 pm    Post subject: Reply with quote
I was intrigued, so I looked at your blog and Googled "Cassegrain astronomical telescope" - http://en.wikipedia.org/wiki/Cassegrain_reflector

It's become a bit clearer now, and very interesting. And from a non scientific view, the images are stunning in their own right.


PostPosted: Mon Feb 13, 2012 12:14 am    Post subject: Reply with quote
Well done on the new set of lenses


PostPosted: Mon Feb 13, 2012 1:21 am    Post subject: Reply with quote
COngrats.. those are really something.
I hope you can find some other use of them. and more pictures for us


PostPosted: Mon Feb 13, 2012 2:33 am    Post subject: Reply with quote
The video is amazing. Hard to stop looking at it.


PostPosted: Mon Feb 13, 2012 2:48 am    Post subject: Reply with quote
Striking, unique, thanks for sharing.

If you want to get a million Youtube hits, just record a little more video like that and use this for the soundrack - http://www.youtube.com/watch?v=6a3NcwfOBzQ


PostPosted: Mon Feb 13, 2012 10:25 am    Post subject: Reply with quote
Thanks guys, appreciate your words!


PostPosted: Mon Feb 13, 2012 11:10 am    Post subject: Reply with quote
These lenses are like psychedelic drugs for your camera Smile...

Still the question... are they made for a special use? Do you know their original use? I guess not "only" for taking photos / playing around, as they don't have an aperture and UV below 200nm is very strange (but cool Wink) and only usable in vacuum or special atmosphere.


PostPosted: Mon Feb 13, 2012 11:15 am    Post subject: Reply with quote
ForenSeil wrote:

Still the question... are they made for a special use? Do you know their original use? I guess not "only" for taking photos / playing around, as they don't have an aperture and UV below 200nm is very strange (but cool Wink) and only usable in vacuum or special atmosphere.


I did not respond because I have assumed you read what I have written about those lenses, but I guess the images drew your attention away from the text? Very Happy

So what is unclear about that:

So, the scientific lenses he invented and custom made were for deep UV recording (capable to work beyond beyond 200nm, especially made to record the 121nm Lyman alpha lines - only in vacuum or nitrogen atmosphere of course), but having no chromatic aberration also in VIS and IR. It is a pure lensless catoptric (reflex) Cassegrain design, which came in f2.8/200mm and f1.1/90mm versions for FF cameras (43mm resp. 25mm image circle, the latter for image intensifiers), focusing from 10 inches to infinity and some adjustable 50mm back focal length.


PostPosted: Mon Feb 13, 2012 12:44 pm    Post subject: Reply with quote
kds315* wrote:
ForenSeil wrote:

Still the question... are they made for a special use? Do you know their original use? I guess not "only" for taking photos / playing around, as they don't have an aperture and UV below 200nm is very strange (but cool Wink) and only usable in vacuum or special atmosphere.


I did not respond because I have assumed you read what I have written about those lenses, but I guess the images drew your attention away from the text? Very Happy

So what is unclear about that:

So, the scientific lenses he invented and custom made were for deep UV recording (capable to work beyond beyond 200nm, especially made to record the 121nm Lyman alpha lines - only in vacuum or nitrogen atmosphere of course), but having no chromatic aberration also in VIS and IR. It is a pure lensless catoptric (reflex) Cassegrain design, which came in f2.8/200mm and f1.1/90mm versions for FF cameras (43mm resp. 25mm image circle, the latter for image intensifiers), focusing from 10 inches to infinity and some adjustable 50mm back focal length.


I read that it's made for deep UV recording and lyman alpha lines but I don't where to photograph these on earth, except some very special purposes like making atomic emission visible etc.. But why using such a long focal length for that purpose? Or is their intent not further specified?


PostPosted: Mon Feb 13, 2012 12:56 pm    Post subject: Reply with quote
I have no further info, except some patent and scientific papers where that was mentioned, like for genetic analysis down to 200nm. This is all laboratory use.


PostPosted: Mon Feb 13, 2012 1:07 pm    Post subject: Reply with quote
kds315* wrote:
...like for genetic analysis down to 200nm....
Ah now I understand their weird attributes Smile Thank you!
I will have a look for similar lenses in automatic sequenzers etc. when the next DNA- or medical reserch laboratory is quitting here Smile
I already had access to some defective gadgets of that kind and didnt know that they may contain such nice lenses Mad


PostPosted: Mon Feb 13, 2012 1:11 pm    Post subject: Reply with quote
Wish you best of luck then!


PostPosted: Mon Feb 13, 2012 1:45 pm    Post subject: Reply with quote
Amazing lenses for photographers and collectors! Shocked


PostPosted: Mon Feb 13, 2012 8:14 pm    Post subject: Reply with quote
hoanpham wrote:
...
I m not sure how many of us are playing with invisible lights.
...


I love invisible "light" too - but more the near infrared part as hobby.
I worked for a company as a service technician for infrared (thermal) and highspeed video. Now the company I work for today, bought a manufacturer of different infrared (thermal), highspeed, x-ray and UV cameras.
So I plan to go a bit further into such non-visible radiation.


PostPosted: Mon Feb 13, 2012 8:30 pm    Post subject: Reply with quote
ZoneV wrote:
hoanpham wrote:
...
I m not sure how many of us are playing with invisible lights.
...


I love invisible "light" too - but more the near infrared part as hobby.
I worked for a company as a service technician for infrared (thermal) and highspeed video. Now the company I work for today, bought a manufacturer of different infrared (thermal), highspeed, x-ray and UV cameras.
So I plan to go a bit further into such non-visible radiation.


Great, so I hope to see some of that here once!!


PostPosted: Sun Oct 21, 2018 6:22 pm    Post subject: Reply with quote
Here now some results with this lens after proper infinity conversion...
http://forum.mflenses.com/lyman-alpha-experimental-f1-1-90mm-mirror-lens-t79880.html


PostPosted: Thu Oct 25, 2018 5:21 pm    Post subject: Reply with quote
For the astrophysicist enthusiasts check out the wiki page on Lyman alpha lines. Not suitable for uneducated fools like me. (Eigenstates? Huh?)
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