Good to be back on the forum

Holography related topics.
dannybee
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Good to be back on the forum

Post by dannybee » Thu Feb 02, 2017 2:52 pm

Hi, Im no longer on facebook, but so good to be back in the forum here, is there anything new happing in holography? any new makers of film? just want to get caught up to date on everything.. thanks

HoloM
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Re: Good to be back on the forum

Post by HoloM » Thu Feb 02, 2017 3:26 pm

Welcome back!
I miss the discussions here on the forum as most is happening on fb , but I think fb isn't good for discussing because you don't find anything a short time later .

What are you interested in? Silver halide or dcg? Denisyuks or split beam? Red or green? Color?

dannybee
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Re: Good to be back on the forum

Post by dannybee » Fri Feb 03, 2017 1:55 pm

wow all of the above..... :D I have been ready alot of really old books (1850) on processes (Photographic Reproduction Processes) and (How to make old-time photos) I saw some applications to DCG and Iron processes and some old forgotten processes with silver and other metal salts.
I want to see if they can be applied to holography, I see in here that someone came out with a new color film, is it any good? also I remember something about a polmyer you had told me about... just want to get caught up on the latest, sorry I cant do facebook... this will have to do

John Klayer
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Re: Good to be back on the forum

Post by John Klayer » Sat Feb 04, 2017 1:52 am

Gee Danny! I didn't know you left the Forum. I thought you were just being real quiet. Sure, we want you here and hear you.

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admin_jsfisher
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Re: Good to be back on the forum

Post by admin_jsfisher » Sat Feb 04, 2017 3:49 pm

Everyone was being really quiet. Maybe that is beginning to change, now. :)

dannybee
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Re: Good to be back on the forum

Post by dannybee » Mon Feb 06, 2017 12:28 pm

Yes I so hope so, facebook is not the best place to exchange Ideas

dannybee
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Re: Good to be back on the forum

Post by dannybee » Mon Feb 06, 2017 12:40 pm

John Klayer love your idea and use of a fiberoptic as a refrence beam, so simple yet profound. I have found in color holography reflections (single beam) this idea is very useful for even lighting and mixing of the 2 or 3 beams. I use a fiber lens as a mixer and maintain about 4" depth. I have also used it in a transmission holograms and got fair results. Im so glad that they talked about your setup in the last "Practial Holography" im finding out that ther is ways to getaround the limitation in our setups :D

John Klayer
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Re: Good to be back on the forum

Post by John Klayer » Sat Mar 18, 2017 4:35 am

Yes, with enough coherence length, multimode fibers work well for the reference beam. I wish more holographers would give it a try.

dannybee
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Re: Good to be back on the forum

Post by dannybee » Thu Mar 23, 2017 10:55 am

John Klayer wrote:Yes, with enough coherence length, multimode fibers work well for the reference beam. I wish more holographers would give it a try.
I love using a fiber lens on color holography, it make the beam mixing so easy and very clean, and even with the hene I get a good coherence as long as the beams go threw the center of the lens, I have 2 fiber lens one small and one twice as big..the bigger one the fibers are really fine that you can't see the fibers , the beam size I use is 1 cm

Grayham
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Re: Good to be back on the forum

Post by Grayham » Wed Apr 19, 2017 2:58 am

I have been looking at fibre optics as single mode cables are quite cheap these days.
I was looking at the beam splitter cables 1x2, 1x4 etc and wondering what to use.

The commercial cables all seem to be for the infrared range. Could you tell me if these are any good for splitting 532nm please or do i need to buy specific cables?

Many Thanks
Grayham

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