Danny Bee's color setup

dannybee · Post by **dannybee** » Mon Jul 09, 2012 1:11 pm

http://www.surplusshed.com/pages/item/l3172.html

dannybee · Post by **dannybee** » Mon Jul 09, 2012 1:28 pm

to control the amount per beam you can use a p-filter or some kind of atenuator

holomaker · Post by **holomaker** » Tue Jul 10, 2012 4:34 am

thanks for the diagram Danny, i have a question or two, is it really necessary to use the combining cube or can the three beams just be coincident on the fiber lens, as the color cube will eat a good amount light ?
How much light does the fiber lens eat up ?
Can you supply a picture of the successful hologram ?

dannybee · Post by **dannybee** » Tue Jul 10, 2012 8:46 am

http://www.youtube.com/embed/qnGacTXfXG0
ok here the video, and yes you could remove the cube if the laser where very close togeather,there is not much loss with fiber
(video was taken on phone.. so its not the best)
http://www.facebook.com/l.php?u=http%3A ... SRT6ZBHm_A

Dinesh · Post by **Dinesh** » Tue Jul 10, 2012 11:33 am

holomaker wrote: i have a question or two, is it really necessary to use the combining cube or can the three beams just be coincident on the fiber lens, as the color cube will eat a good amount light ?

All three beams have to be co-linear if you intend to reconstruct with a single white light source. Since the reconstruction source has all the colour components all going in co-linearly, the three reference beams must also go in co-linearly. That's actually one of the tricks of colour holography - the combining of the component wavelengths when recording. If there is even a small angular variation, then, depending on your reconstruction source, there'll be a colour separation of the image. In a display hologram, this may show up as if the colours were running into each other at the edges. Having said that, however, if the reconstruction source has dimension, like say the filament of a halogen bulb, then the different components are going in very slightly different directions anyway from the recon source and so a very slight angular deviation of the recording source may not be noticed. The way to see this is to make a hologram using Danny's setup, then reconstruct with a standard incandescent lamp, a halogen lamp (smaller filament) and the sun. If there's any angular difference in the recording components, there will be a slight difference in the colour rendition from each of the three reconstructions.

Danny, what is that? A green and orange duck?

dannybee · Post by **dannybee** » Tue Jul 10, 2012 3:19 pm

its not a truck

holomaker · Post by **holomaker** » Tue Jul 10, 2012 6:04 pm

yes surely we can see it Santa Claus with a lil' one on his lap . Ho Ho Ho!