Holographyforum.org / holowiki.org

Sorry. You are in the wrong forum. This forum is dealing with holography, a physical principle for recording 3D images, based on the interference of light waves. Your thing hasn't to do anything with holography, neither with 3D. It is only a half translucent mirror which reflects the light of the sc...

hi I also use inner tubes, but it is no problem if they go flat, as I have extended the valve with a hose. So i removed the original valve, added the hose, guided it through a hole in the base plate, and added a new valve on the other end of the hose. So after a few weeks the tubes loose air and get...

Oh, that's a pitty! As holograms consist of gelatins, no only sunlight can destroy a hologram. Also temperature and especially humidity can cause problems. If it is stored in a humid surrounding, the gelatin can grow and the image vanishes, as the Bragg planes are growing, too. Therefore the hologra...

And this two Starships:
11x11 cm Polymer ( about 4,3x4,3")
8x12 cm Film ( about 3x4,7")

Also available is this one:
It's about 19x24 cm (8x10") and on film. Bright.

Don't know the company. Maybe Laza or Richmond?

Anyone interested in this one: bicycle.jpg It's a bicycle on a mirror. Parts of the bicycle can be seen in the mirror. It's about 26x36 cm (about 10x14"), It's a heavy, sealed double glass plate, and I assume (but not really sure) that it is a DCG. Made by a german company, I think. Please send...

Hi,
How long can I use a Pyrogallol developer ?
I have two solutions ,
Pyrogallol in water and sodium carbonate in water.

How long can I store both solutions?

If I mix both together for development, how long can I use it for development?
Only one hologram , or a few hours?
Any experiences?
Thanks

Hm. Ok so I exposed 100 sec, and it was far too less, to get a reasonable density with three minutes development. With 360 secs, I got a better density, but still not d=2 in three minutes. So,what's wrong with my calculation? It seems that 1000s would heave been the better choice!? Have I misunderst...

I have a spatial filter, which I bought about 10 years ago. I need a new microscope objective for this. How do I determine, if the microscope objective has metric or english thread? Or are there no different threads with microscope objectives, and any fits? I have this one: http://en.opmount.com.tw/...

Am I really? Your calculation doesn't take my measurement of 10 mV at the voltmeter into account, I think. You take 1mv as reference?! That's the missing factor of 10? For measuring beam ratio for white light reflection copy, I measure perpendicular to the reference beam, and parallel to the film fo...