Search found 8 matches

by Tekosh
Tue Sep 20, 2022 1:15 pm
Forum: General Holography
Topic: Digital Hologram
Replies: 0
Views: 9151

Digital Hologram

Hey all, What type of camera do people usually use to record holograms digitally? I have 3 requirements: Smaller than 5 um pixel pitch. Bigger than 0.5 inches diagonal. Also, preferably without a cover plate. The cover plates add newton rings and moire patterns. This might not be necessary. I need t...
by Tekosh
Fri Apr 22, 2022 1:30 pm
Forum: General Holography
Topic: Alternative photopolymer film
Replies: 6
Views: 5108

Re: Alternative photopolymer film

I want over 98% transparency. I get 92% right now. How do you measure transparency, Tekosh? If it is just power after the photopolymer / power in front of, I doubt you can get over about 92% due to Fresnel reflections -- you lose about 4% at both air-photopolymer boundaries. I don't think you can g...
by Tekosh
Mon Apr 18, 2022 1:57 pm
Forum: General Holography
Topic: Alternative photopolymer film
Replies: 6
Views: 5108

Re: Alternative photopolymer film

jrburns47 wrote: Fri Apr 15, 2022 9:47 pm Covestro needs nothing except exposure to sunlight. Zilux I think has to be heated. Pick your poison or mix your own from the many recipes available in the literature,
The problem with Covestro is that it's not transparent enough.
I want over 98% transparency. I get 92% right now.
by Tekosh
Mon Apr 18, 2022 1:57 pm
Forum: General Holography
Topic: Alternative photopolymer film
Replies: 6
Views: 5108

Re: Alternative photopolymer film

The problem with Covestro is that it's not transparent enough.
I want over 98% transparency. I get 92% right now.
by Tekosh
Fri Apr 15, 2022 6:14 pm
Forum: General Holography
Topic: Alternative photopolymer film
Replies: 6
Views: 5108

Alternative photopolymer film

Hey all,

I am aware of Covestro and Zilux films.
But are there any alternative films I can use?
I am looking for the same type of photopolymers that needs no crazy post-processing steps.
by Tekosh
Wed Dec 11, 2019 1:12 pm
Forum: Optics
Topic: compact RGB collimated unit
Replies: 6
Views: 6158

Re: compact RGB collimated unit

I actually have that one. I made the laser driver myself. It has two problems. The polarization for green is different than Red and Blue, so I will need to add a waveplate to the green which is a challenge given the super small space. Also, the lasers are not very well aligned and in order to expand...
by Tekosh
Mon Dec 09, 2019 7:40 pm
Forum: Optics
Topic: compact RGB collimated unit
Replies: 6
Views: 6158

compact RGB collimated unit

Hi All, I don't know if this is the right thread for my question. I'm looking for a compact RGB collimated unit which outputs a 1-inch, aligned, collimated beam. I haven't been able to find an appropriate one. The lasers don't need to be super coherent, laser diodes work just fine. Do you guys have ...
by Tekosh
Mon Sep 23, 2019 4:01 pm
Forum: General Holography
Topic: One Job Opening in the holography field
Replies: 0
Views: 5520

One Job Opening in the holography field

Hi, my fellow holographers, Is there someone here looking for a job in holography? Requirements: MS or BS Degree in Electrical Engineering, or Optics AT least 5 years experience with holograms. Someone who knows the literature of holography and knows how to make them if provided with the right equip...