Search found 270 matches

by Din
Thu Jul 22, 2021 8:45 am
Forum: General Holography
Topic: Bayfol
Replies: 20
Views: 296

Re: Bayfol

No still the old batch, it seem the polymer is very stable, it's based on 2 layers the resin and the molymer with dye and borax at lest that what I understand from read the paper on it , so it's only when exposed to light that the 2 layers mix Yes, it is very stable while unexposed. But, once expos...
by Din
Sun Jul 11, 2021 1:57 pm
Forum: Off Topic
Topic: Point cloud holographic AR
Replies: 0
Views: 129

Point cloud holographic AR

Interesting approach
by Din
Sun Jul 11, 2021 1:48 pm
Forum: Off Topic
Topic: Holographic AR/VR
Replies: 0
Views: 27

Holographic AR/VR

Facebook Reality labs are developing a holographic AR/VR headset using liquid crystal polarisation optics. I used this approach in 1986 for NTS. But, back then, the application was for EMP rejection and agile laser protection goggles. Back in 1986, hardly anyone had worked with liquid crystals, but ...
by Din
Mon Jun 21, 2021 1:04 pm
Forum: Optics
Topic: Dammit!
Replies: 6
Views: 436

Re: Dammit!

lobaz wrote:
Sun Jun 20, 2021 12:51 pm
I guess most researchers are on the same boat :)
Yep! :D
by Din
Mon Jun 21, 2021 1:02 pm
Forum: Optics
Topic: Dammit!
Replies: 6
Views: 436

Re: Dammit!

The experimental setup did not show up 9again, the preview showed it!
profile 4.jpg
profile 4.jpg (507.3 KiB) Viewed 403 times
by Din
Mon Jun 21, 2021 1:01 pm
Forum: Optics
Topic: Dammit!
Replies: 6
Views: 436

Re: Dammit!

Having got the profile, they then solve Maxwell inserting the appropriate RIP, and then getting the transmission modes in the waveguide. You can see the modes below. The experimental setup uses a Mach Zender with the sample waveguide placed in one arm.
The attachment profile 3.jpg is no longer available
The attachment profile 3.jpg is no longer available
by Din
Mon Jun 21, 2021 12:57 pm
Forum: Optics
Topic: Dammit!
Replies: 6
Views: 436

Re: Dammit!

The actual profile didn't show up (despite it showing up on the preview!). here it is:
profile 2.jpg
profile 2.jpg (173.26 KiB) Viewed 403 times
by Din
Mon Jun 21, 2021 12:48 pm
Forum: Optics
Topic: Dammit!
Replies: 6
Views: 436

Re: Dammit!

I guess most researchers are on the same boat :) They're trying to characterise the refractive index profile (RIP) of the new waveguides made from polymers, which have a kind of RIP not seen before (below). As you can see, the RIP is rapidly changing near the origin, and then varies slowly away fro...
by Din
Fri Jun 18, 2021 2:35 pm
Forum: Optics
Topic: Dammit!
Replies: 6
Views: 436

Dammit!

Dammit! Thought of this about 10 years ago. Yes, I know the joke: How many holographers does it take to change a light bulb? 10, one to change the bulb and 9 to say, "I thought of that 10 years ago!" About 1987, Tomasz Jannsen (owner POC) and I were talking about using the WKB approximation to model...
by Din
Thu Jun 03, 2021 8:45 am
Forum: Off Topic
Topic: New addition to my librarry
Replies: 1
Views: 369

Re: New addition to my librarry

I tried to show the contents page, but it didn't show up. Here it is: