John,
This is the best we've got. The biggest challenge is to launch the light through the edge. If you use commercial silver halide, you need to back it with a glass slab and launch into the slab because the plate is fairly thin.
Search found 401 matches
- Tue Nov 03, 2015 1:53 pm
- Forum: General Holography
- Topic: Edge Lit
- Replies: 5
- Views: 3567
- Thu Oct 15, 2015 12:32 pm
- Forum: DCG
- Topic: question about color changes
- Replies: 2
- Views: 2306
Re: question about color changes
It depends on whether you're shooting H1/H2 or single beam Denisyuks. Even so, there may be many reasons for this colour change Generally, the colour of a reflection hologram is based on the plane separation, angle of recon wrt the reference angle and recon wavelength. There's a formula in Kogelnik ...
- Fri Oct 02, 2015 12:22 pm
- Forum: Gallery
- Topic: Wedding present
- Replies: 2
- Views: 6709
Re: Wedding present
Thanks.
- Thu Oct 01, 2015 2:10 pm
- Forum: Gallery
- Topic: Wedding present
- Replies: 2
- Views: 6709
Wedding present
Don't do display anymore, but occasionally, I get to play. These are for a wedding present for a friend. They'll have little rubber feet and end up as coasters.
- Tue Sep 15, 2015 12:48 pm
- Forum: General Holography
- Topic: making a hologram printer?
- Replies: 6
- Views: 4403
Re: making a hologram printer?
Gezzer, Yes, that would be a CGH. However, you haven't specified a "reference beam" into the calculation. In this case, you have a "reference beam", that's pretty much on-axis. That is, the reference beam angle is simulated at zero degrees. You need to add the reference beam to g...
- Mon Sep 14, 2015 6:30 pm
- Forum: General Holography
- Topic: making a hologram printer?
- Replies: 6
- Views: 4403
Re: making a hologram printer?
For CGH, or Computer Generated Hologram, you actually calculate Fourier terms. Since the far field pattern of any scene is the Fraunhofer diffraction pattern (Note to Petr: Yes, I know you can have Fresnel hologram also! :) ), the fringe pattern recorded on a hologram is the Fraunhogfer diffraction ...
- Mon Sep 14, 2015 5:55 pm
- Forum: General Holography
- Topic: making a hologram printer?
- Replies: 6
- Views: 4403
Re: making a hologram printer?
I think you may be confusing several ideas. The problem with phrases like "digital holography" and "computer generated holography" is that these phrases are not precisely defined. Hence, each person has a different concept in mind. Firstly, digital holography, or digital hologram...
- Wed Aug 26, 2015 2:42 pm
- Forum: Off Topic
- Topic: Zebra Job Opening
- Replies: 0
- Views: 4376
Zebra Job Opening
Zebra has announced a job opening for a senior optical engineer/technician. It's a full time position in Austin, TX, where Zebra is based. The top of the "Knowledge, Skills and Abilities" section specifically mentions "Passion for holography", so I thought it may interest some on...
- Wed Aug 26, 2015 1:33 pm
- Forum: Beginning Holography
- Topic: Unwanted fringes
- Replies: 14
- Views: 7308
Re: Unwanted fringes
Petr, you got your comment in just at the same time as I did! I think we both agree it's object motion
- Wed Aug 26, 2015 1:32 pm
- Forum: Beginning Holography
- Topic: Unwanted fringes
- Replies: 14
- Views: 7308
Re: Unwanted fringes
The picture and the video which I attached in the first post depicted only reconstructed hologram (without real guitar and objects behind). So the fringes are recorded on the hologram. The guitar was without excitation during exposure which means that the fringes are parasitic. Checking the vibrati...