# Thread: Beating the diffraction limit

1. ## Beating the diffraction limit

Negative index metamaterials allows for the diffraction limit to be beaten, although a perfect image of the object still can't be reconstructed. I hope that in the years to come when this technology is introduced, large format will also receive the benefit of negative index metamaterials lenses.

Beating the diffraction limit

(a lot of this stuff went well over my head)

2. ## Re: Beating the diffraction limit

Originally Posted by dh003i
Negative index metamaterials allows for the diffraction limit to be beaten, although a perfect image of the object still can't be reconstructed. I hope that in the years to come when this technology is introduced, large format will also receive the benefit of negative index metamaterials lenses.
Don't believe a physicist, if one uses negative-refractive-index material as a taking lens the light will be accelerated above the speed of light and so one can get a black hole in the camera.

BTW every thin metal layer like used as dicroic-filter-layer has a negative refractive index too.

3. ## Re: Beating the diffraction limit

Perfect lenses like this have been realised. But they work at 1:1 with a working distance of the order of the wavelength being focussed.

You might as well contact print. :-)

4. ## Re: Beating the diffraction limit

There is a much simpler way to beat the "normal" diffraction limits when doing b/w: shooting with ortho- or unsensitized film or using colour filters in the direction of the blue part of the visible spectrum.

How can this work? With normal film you have for instance at f22 a diffraction limit of about 70 lines per millimeter (for shooting infinity) for panchromatic-film whose spectral-sensitivity-curve is centered at about 500 nm. When shooting ortho- or even unsensitized material, the center of the spectral-sensitivity-curve is shifted more and more in the blue direction of the spectrum. At corresponding wavelengths for instance at 486 nm you have already an increased diffraction limited resolution of 75 lpm (f22, infinity) and at 436 nm a (17 % higher than at 500 nm) value of 82 lpm (f22, infinity). I think you see where I want to go....

5. ## Re: Beating the diffraction limit

I getting out of here, your guys are getting too weird for me.

Lynn

6. ## Re: Beating the diffraction limit

Don't get mad Lynn, I know you and your CV too well and you have way too much lens know how to participate here

7. ## Re: Beating the diffraction limit

Originally Posted by A49
There is a much simpler way to beat the "normal" diffraction limits when doing b/w: shooting with ortho- or unsensitized film or using colour filters in the direction of the blue part of the visible spectrum.

How can this work? With normal film you have for instance at f22 a diffraction limit of about 70 lines per millimeter (for shooting infinity) for panchromatic-film whose spectral-sensitivity-curve is centered at about 500 nm. When shooting ortho- or even unsensitized material, the center of the spectral-sensitivity-curve is shifted more and more in the blue direction of the spectrum. At corresponding wavelengths for instance at 486 nm you have already an increased diffraction limited resolution of 75 lpm (f22, infinity) and at 436 nm a (17 % higher than at 500 nm) value of 82 lpm (f22, infinity). I think you see where I want to go....
Sounds like you might want to go to eximer laser illumination at say 190 nm if you could find the glass to handle it along with a suitable emulsion.

Nate Potter, Austin TX.

8. ## Re: Beating the diffraction limit

Electron beam in a vacuum. Tough on portrait subjects, though.

Peter Gomena

9. ## Re: Beating the diffraction limit

Originally Posted by Peter Gomena
Electron beam in a vacuum.
Miles resp. nanometers away from the diffraction limit!

With electron lenses, only positive lenses are aviable, so one can only use very small (numerical) apertures.

10. ## Re: Beating the diffraction limit

Originally Posted by Peter Gomena
Electron beam in a vacuum. Tough on portrait subjects, though.

Peter Gomena
Great art is worth suffering for.

--Darin

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•