Canon USAF Concept , one pinhole behind other for aberrations

[Mustafa Umut Sarac]

I want to make a giant lens for a long time and my main aim is to build 1500 mm photon sieve lens with giant diameter and ready for Hasselblad.

Photon Sieve concept comes from 50 years history but put on to the table with USAF Geoff Andersen. His aim is to build a extremelly big may be 180 meters diameter flat lens to the space after Hubble and James Webb telescopes.

He tried at lab , with 10 cms diameter silicon wafer with 1 million pinhole which put on to the surface with electron beam.

Larger the diameter and more the pinholes , better the image quality.

I worked at prepress sector and it was possible to print such a pinholes on to film.

I contacted with USAF and he told me 10 cms diameter will have a very narrow sensivity.

Than I read here about pinhole films and people were complaining the film aberrations and lack of good image quality.

And I looked to canon website about their diffractive teleobjective lens element and after studying feed back at electronic amps. I learned that canon put two diffractive element one behind of another and cancel the aberrations.

I am looking for your comments to resolve better image with two same photon sieve on behind of another and cancelling the aberrations.

Does it work ?

Best ,

Mustafa Umut Sarac

Istanbul

 

[phfitz]

Mustafa,
"I am looking for your comments to resolve better image with two same photon sieve on behind of another and cancelling the aberrations."

I don't know if this will help, back in the 1940 - 60's Kodak had a diagram for an overhead exposure lamp for contact printing. It had a disc with a center hole followed by a second disc with the same center hole (and optionally a third disc with center hole). This setup will only allow light going out in a straight line to pass through, making for noticeably sharper contact prints. Stacking 2 sieves over each other will only allow light to pass through in a straight line limiting angle of view for the 'lens'