Purple fringing soon to be a thing in the past?

Binth · 11-21-2018, 11:04 AM - **1 Like**

Interesting article

Researchers figure out how to eliminate purple fringing in photography - TechSpot

**MossyRocks** · 11-21-2018, 12:26 PM

Neat but a bit light on details. The original Harvard press release is better.

**RKKS08** · 11-21-2018, 03:14 PM

The full description can be found in "Supporting Information for: Broadband achromatic metasurface-refractive optics".

The PDF can be downloaded here;
https://pubs.acs.org/doi/suppl/10.1021/acs.nanolett.8b03567/suppl_file/nl8b03567_si_001.pdf

**MossyRocks** · 11-21-2018, 10:11 PM

Originally posted by RKKS08

The PDF can be downloaded here;

I didn't find that when I searched and only found the one behind the journal that wants you to pay. Seems impressive and looks like it would basically make any lens a superachromat one.

reh321 · 11-22-2018, 01:01 PM

Originally posted by MossyRocks

I didn't find that when I searched and only found the one behind the journal that wants you to pay. Seems impressive and looks like it would basically make any lens a superachromat one.

If I understand correctly, this is a coating the manufacturer would apply, so the "any lens" translates to "any new lens that purchases their coating" - I wonder how much that would increase demand for new lenses.

**clackers** · 11-22-2018, 01:11 PM

Originally posted by reh321

If I understand correctly, this is a coating the manufacturer would apply, so the "any lens" translate to "any new lens" - I wonder how much that would increase demand for new lenses.

New designs, I reckon. At the moment you tend to put a correcting second element of a different refractive index in front of the first, now it could instead be a coating of this stuff in a vaporization chamber.

Real world performance versus corrective elements or fluorite glass? We'll have to wait and see. They're in the research/proof-of-concept stage, so by going to the press they're fishing for investors.

stevebrot · 11-22-2018, 09:21 PM - **1 Like**

This group has been working on this sort of thing for several years. The technique is similar to that of a Fresnel lens, but at a nano scale. The linked article makes somewhat larger claims than the actual article it was based on, but still this is very interesting.

Steve

**MossyRocks** · 11-23-2018, 08:55 AM - **1 Like**

Originally posted by stevebrot

The linked article makes somewhat larger claims than the actual article it was based on, but still this is very interesting.

That is why I was looking for the original. It seems like what ever gets published in the mainstream is very different from the original journal or technical paper. It still does look to be fairly impressive in what it was able to do

11-21-2018, 11:04 AM - 1 Like	#1
Binth Junior Member Join Date: Sep 2013 Location: Madison, WI Posts: 36	Purple fringing soon to be a thing in the past? Interesting article Researchers figure out how to eliminate purple fringing in photography - TechSpot

11-22-2018, 01:01 PM	#5
reh321 Pentaxian Join Date: Nov 2014 Location: South Bend, IN, USA Photos: Gallery \| Albums Posts: 23,179	Originally posted by MossyRocks I didn't find that when I searched and only found the one behind the journal that wants you to pay. Seems impressive and looks like it would basically make any lens a superachromat one. If I understand correctly, this is a coating the manufacturer would apply, so the "any lens" translates to "any new lens that purchases their coating" - I wonder how much that would increase demand for new lenses. Last edited by reh321; 11-22-2018 at 09:41 PM.

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11-21-2018, 12:26 PM	#2
MossyRocks Loyal Site Supporter Join Date: Nov 2017 Location: Minnesota Photos: Gallery \| Albums Posts: 2,982	Neat but a bit light on details. The original Harvard press release is better.

11-21-2018, 03:14 PM	#3
RKKS08 Site Supporter Join Date: Mar 2010 Location: Frankfurt am Main Posts: 1,241	The full description can be found in "Supporting Information for: Broadband achromatic metasurface-refractive optics". The PDF can be downloaded here; https://pubs.acs.org/doi/suppl/10.1021/acs.nanolett.8b03567/suppl_file/nl8b03567_si_001.pdf

11-21-2018, 10:11 PM	#4
MossyRocks Loyal Site Supporter Join Date: Nov 2017 Location: Minnesota Photos: Gallery \| Albums Posts: 2,982	Originally posted by RKKS08 The PDF can be downloaded here; I didn't find that when I searched and only found the one behind the journal that wants you to pay. Seems impressive and looks like it would basically make any lens a superachromat one.

11-22-2018, 01:11 PM	#6
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by reh321 If I understand correctly, this is a coating the manufacturer would apply, so the "any lens" translate to "any new lens" - I wonder how much that would increase demand for new lenses. New designs, I reckon. At the moment you tend to put a correcting second element of a different refractive index in front of the first, now it could instead be a coating of this stuff in a vaporization chamber. Real world performance versus corrective elements or fluorite glass? We'll have to wait and see. They're in the research/proof-of-concept stage, so by going to the press they're fishing for investors.

11-22-2018, 09:21 PM - 1 Like	#7
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	This group has been working on this sort of thing for several years. The technique is similar to that of a Fresnel lens, but at a nano scale. The linked article makes somewhat larger claims than the actual article it was based on, but still this is very interesting. Steve

11-23-2018, 08:55 AM - 1 Like	#8
MossyRocks Loyal Site Supporter Join Date: Nov 2017 Location: Minnesota Photos: Gallery \| Albums Posts: 2,982	Originally posted by stevebrot The linked article makes somewhat larger claims than the actual article it was based on, but still this is very interesting. That is why I was looking for the original. It seems like what ever gets published in the mainstream is very different from the original journal or technical paper. It still does look to be fairly impressive in what it was able to do