Holographyforum.org / holowiki.org

Can you add a green dye to the green film and revitalize it? I have no idea, I never tried to play with the emulsion. Although I don't understand emulsion chemistry, I do not think that just adding the dye would help as the emulsion gets as white as milk-in-water after development; I would expect t...

Hi, we have a full fridge of very old Agfa plates (10E56 + antihalation, 10E75, 8E75) - I think they expired about 20 years ago. Anyway, the red ones work great. On the other hand, when I try a green one, the emulsion gets milky and no image appears (maybe once I got a very very weak one). Does anyo...

Thanks guys for a lot of answers. Dinesh, are you sure that longitudinal magnification in your article (page 5, first equation on the page, unnumbered) is correct? I did not have time to recalculate it but I checked four publications (two of them in Czech, Goodman's Introduction to Fourier optics, 3...

Hi, we have a laser litography system at the University of West Bohemia, Czech Republic. We can make pixel about 1 um big, the photoresist size is about 5x5 cm. You have to ask for the price but last time it was about 350 EUR (about 450 USD) for a hologram 3x3 cm. PM me for details. You can also ask...

Hi, is it possible to make a hologram of an object in other than 1:1 scale? I know it is possible to place a lens between a plate and an object, or to play with H1-H2 process, but every such technique I know has different lateral and longitudinal magnifications. Is it possible to make them equal? I ...

The only problem I see is the funding. What about a "Donate" button on the holowiki page and a paypal account? What is your estimate of the cost?
Petr

Nice one. What are the hologram dimensions? Do you make reflection or transmission H1?
Petr

Actually, in June issue of OPN there is a short article about open source 3D printed optic components. See http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0059840 and http://www.thingiverse.com/jpearce/collections/open-source-optics . Metal optomechanic components are great but ju...

Good decision, Chanwoo. I have a few holograms by smirholo and they are excellent.
Petr

Because nobody wants to buy them. It's a matter of content and price. I buy - from time to time - technically interesting holograms. For me (for example), the content I am looking for has to be technically interesting - various holographic techniques, various processing, recording materials, unusua...