Single piece,single polymer,view camera lens design

[Mustafa Umut Sarac]

Is there any lens designer at the forums ?
I am reading about lenses since the internet came to home and I was thinking that a professional grade lens contains many glasses and many elements.
Today I shocked with reading hologon is a single piece lens.
My aim is to build a two piece mold with the precision of 1/1000 mms and load it by polymers by hand and produce my own view camera lenses.
I know heat is important but easiest to control part. I can add a ultrasonic bubble remover also.- I first saw them spin casting epoxy telescope mirrors -
I have friends which service cnc machines and they can produce this mold for me. Thats why I need a single piece complex polymer lens design. Is anybody tried to design a polymer lens for this purpose , from zeiss or others ? Or which design is hopeful or suitable for lens design software optimisation ? I am thinking to use clear epoxy , acrylic or polyester. May be someone manage to mix polymer with nano particles also ?

Best ,

Mustafa Umut Sarac

 

[Mustafa Umut Sarac]

It can be a hasselblad format lens also.

 

[Roger Hicks]

Dear Mustafa,

Yes, it's a single piece (group) -- but made up of several separate pieces (elements), cemented together...

You need more than one element to correct aberrations. The two classical routes are symetrical derivatives (many aberrations cancelling out automatically at infinity, even with a very simple 2-glass lens with glasses of the same refractive index, though normally each pair is itself a cemented doublet with the two components having different refractive indices) and triplet derivatives, always using (as far as I am aware) glasses of different refractive indices.

I think you need a book such as Cox's Optics to give you an overview of lens design.

Cheers,

R.

 

[AgX]

Nano particles are marketed at the moment as an outcome to anything.
What is your idea of using them?
As a means of controlling the refractive index, as surface layer?


Further think of the shrinkage issue of curing polymers, the initial color, the color shift within time.


Have you ever thought, as you have to resort to CNC turning anyway, of turning/polishing glass lens elements yourself: not as in industry in batches, but single on a lathe?

 

[Moopheus]

You might want to look through some telescope-making books as well; it wasn't all that long ago that it was common for amateurs to grind their own mirrors and lenses by hand; while the designs might be different from what you want, the basic techniques of manufacturing are probably similar. You also used to be able to buy preformed blanks for the purpose, but I haven't kept up with that and don't know where you'd get such stuff today.