Search found 89 matches
- Sun Jan 15, 2017 2:39 pm
- Forum: General Holography
- Topic: How Do I Make A "Holographic Video" that I can play on iPhone?
- Replies: 1
- Views: 2230
Re: How Do I Make A "Holographic Video" that I can play on iPhone?
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...
- Wed Oct 19, 2016 3:57 pm
- Forum: General Holography
- Topic: Isolation Table materials
- Replies: 6
- Views: 4821
Re: Isolation Table materials
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...
- Wed Aug 03, 2016 10:49 pm
- Forum: General Holography
- Topic: greg cherry hologram circa 1987
- Replies: 3
- Views: 2663
Re: greg cherry hologram circa 1987
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...
- Thu May 26, 2016 4:38 pm
- Forum: For Sale / Want to Buy / Trade
- Topic: Some Holograms for sale or trade
- Replies: 4
- Views: 3294
Re: Some Holograms for sale or trade
And this two Starships:
11x11 cm Polymer ( about 4,3x4,3")
8x12 cm Film ( about 3x4,7")
11x11 cm Polymer ( about 4,3x4,3")
8x12 cm Film ( about 3x4,7")
- Thu May 26, 2016 4:33 pm
- Forum: For Sale / Want to Buy / Trade
- Topic: Some Holograms for sale or trade
- Replies: 4
- Views: 3294
Re: Some Holograms for sale or trade
Also available is this one:
It's about 19x24 cm (8x10") and on film. Bright.
Don't know the company. Maybe Laza or Richmond?
It's about 19x24 cm (8x10") and on film. Bright.
Don't know the company. Maybe Laza or Richmond?
- Thu May 26, 2016 4:28 pm
- Forum: For Sale / Want to Buy / Trade
- Topic: Some Holograms for sale or trade
- Replies: 4
- Views: 3294
Re: Some Holograms for sale or trade
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...
- Fri Apr 01, 2016 5:04 pm
- Forum: AgX
- Topic: Reuse of Pyrogallol developer
- Replies: 46
- Views: 67076
Reuse of Pyrogallol developer
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
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
- Sun Feb 21, 2016 7:08 am
- Forum: General Holography
- Topic: Exposure time
- Replies: 28
- Views: 11751
Re: Exposure time
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...
- Sun Feb 21, 2016 7:03 am
- Forum: Optics
- Topic: microscope objective
- Replies: 1
- Views: 10337
microscope objective
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/...
- Fri Feb 19, 2016 2:54 pm
- Forum: General Holography
- Topic: Exposure time
- Replies: 28
- Views: 11751
Re: Exposure time
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...