Will have fun

These are all of the old posts from the first two years of the forum. They are locked.
Updated: 2005-03-28 by HoloM (the god)
danny bruza

Will have fun

Post by danny bruza »

http://www.4c-s.org/Photopolymer.pdf looks like its easy to make
Dinesh

Will have fun

Post by Dinesh »

There is a difference. You try to make necessary equipment for the task at hand if the appropriate equipment is not or cannot be availbale due to cost or non-existence. You figure what you need, make it according to your own specs and use it. It's very true that common materials for holography are not easily available and for the last thirty odd years holographers have had to make use of, or adapt, whatever is handy, sometimes quite ingeniously. This has been going on for years and we in the forum have talked about this, the use of cocktail shakers as cylindrical lenses for rainbows for example.
There are some who armchair-think a piece of equipment that's either over-complicated or unnecessary or does not serve it's intended purpose but appears to. This seems to serve mainly the purpose of demonstrating ingenuity as an end in itself. In my examples, for instance, the exact temperature of a processing bath is completely unecessary. Most Silver developers work just fine at a reasonable room temp of approx 20 C or 70 F. We've seen wonderful work by most practitioners of holography who don't heat the developer. In DCG work also, if I may modestly say my stuff is good, I've never measured the temp of the processing bath. Again room temp is OK. As for the exact density of Silver, I usually advise anyone who asks that the safelight must be almost invisible and this should take about 3 minutes for VRP. You don't need a gadget. The article in The Holographer mentions that you can get Sulphuric Acid from batteries. I suggest that firstly batteries today are sealed, secondly, if you need Sulphuric Acid for a chemical/developing process you need it reasonably pure - not with dissolved lead salts anfd other impurities and thirdly, if you need the stuff and are over 18 most chemical houses will sell it to you for the exorbitant cost of $20 or so. I suggest trying Gallade in San Diego (http://www.galladechem.com/) or Mallincroft ( http://www.mallchem.com/)
This - how shall I say it - obsession with " clever tricks" to achieve ends that are far easier achieved conventionally are what I was talking about. I think this is very different from having to make do with whatever you have because there is no such thing as a holographic plate-holder unless you're on a major research institute's budget


My comment was to do with the revelling in the making of some gadget
Sergio

Will have fun

Post by Sergio »

Thank you.

Interesting structure but may provide stability problems due high plasticizer amounts, the sandwish method is now used by the POLYGRAMA company (ex-Texart)but with a very specialized photosensitive mechanism, not based only in a mero- cyanine dye and photoinitiator, and RED sensitive, a rare feature on photopolymers.

Diffuse objects expand the emulsion requirements to an unpredicted level, but seems that way is open to advances.
danny bruza

Will have fun

Post by danny bruza »

and hows your reserch doing
Michael Harrison

Will have fun

Post by Michael Harrison »

I hope you learn a great deal and come away with a desire to keep working with holography, either display or some other area.




---------------------------
If someone says it can't be done but they haven't tried it, don't believe them.
http://www.dragonseye.com/Holography

Are you going to the next PCG Gathering?
http://www.dragonseye.com/Holography/PCGGI.html
Michael Harrison

Will have fun

Post by Michael Harrison »

The Holographer mentions that you can get Sulphuric Acid from batteries.

That sounds like a very bad idea. If someone trying to get into holography can afford everything else, they can afford sulphuric acid. Was the author writing from a country where sulphuric acid is controlled in some fashion and batteries were suggested as a way to get around those controls?

But it's not going to save the world, it has no undelivered "promise", It's technically and aesthetically no more challenging than making a clay pot or a bronze statue. I think that holography should be enjoyed for what it is, without pretension. If you enjoy making a hologram and i you like the hologram, so much the better!

I agree. A big part of the problem with "holography" is the hype that's been piled on top of it over the years. It's neither perfect nor is it a blend of art and science. At least, by itself it's not. It all depends on what the practitioner does with it. In some ways holography is very similar to a photocopier. It's just a method of reproduction of light at the nanometer level. If all we do with it is reproduce what we see, we're using it like a copier. Granted, I think it's a really pretty and interesting copier but many of the "unenlightened" will just see the original objects and won't be captivated (or perhaps not long) by the medium any more than they would be by the fact that you could go to the local copy store and make them an exact copy of the photo they have in their wallet.





---------------------------
If someone says it can't be done but they haven't tried it, don't believe them.
http://www.dragonseye.com/Holography

Are you going to the next PCG Gathering?
http://www.dragonseye.com/Holography/PCGGI.html
anon

Will have fun

Post by anon »

Dinesh is quite right: most holographers (at least the present generation) are interested more in the process -- the hobbyist zeal of making do with odds and ends -- than the product. There's nothing wrong with that, but it is fundamentally a hobbyist activity, in just the same way that model railroad scenery making has nothing to do with landscape art or indeed art at all. Enjoy the hobby - but you will never, with any combination of tricks to come, make the wider public enthusiastic about holography.
Sergio

Will have fun

Post by Sergio »

Research are being completed by new Polygrama representative in Brazil.

This is a small company and actually they achieve some experimental (reflection) holograms diretly from a diffuse object with single beam illumination with impressive overmodulation with increased brightness.

Tests are conducted with successful colour tones shades similar to DCG material. That special fringe behaviour requires a simple development control.
When all would be OK the emulsion would be released (no shedule yet).
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