Table Design improvements needed

Holomark · Post by **Holomark** » Fri May 23, 2014 5:15 pm

While at PCG4 there were discussions about table design and stability. I mentioned that I use two breadbards (each 18/60) on top of several layers of other material including
5 legs cynder blocks
then thin layer of foam (1/8 inch)
1 inch plywood (36 x 66 inches)
racquet balls (cut in half)
1 inch plywood (36 x 66 inches)
1 inch cynder pavers (completely covering plywood)
Felt - (covering pavers and attached to bottom of 1st plywood - loose wrap)
Breadboards

I have been getting fairly consistent results when working on only 1 of the breadboards, but when some mirrors are on both breadboards the results are inconsistent - possibly because the two bradboards are not secured together or secured to layer below breadboard)

present configuration is with two breadboards parallel to eachother (with 6 inch offset), but they are not secured to eachother

Looking to make this more stable for use with split beam configurations. On suggestion was to make an offset T, and another was to make two separate tables. Plenty of materials o do either or something different.
Any suggestions on 1. increasing stability between the two breadboards; 2. Configuration of breadboards (table) for split beam (transmission and reflection) holograms.
A couple of pictures. You can see while I was away for the weekend there was some encroachment in my space.

: photo 6.JPG (33.31 KiB) Viewed 2283 times

: photo 3.JPG (39.44 KiB) Viewed 2283 times

: photo 2.JPG (37.05 KiB) Viewed 2283 times

: photo 1.JPG (35.17 KiB) Viewed 2283 times

: photo 7.JPG (31.6 KiB) Viewed 2283 times

Holomark · Post by **Holomark** » Fri Jun 27, 2014 10:03 am

I welded (JB Weld) the two breadboards together to make one larger breadboard 60 x 36 in. While not perfectly flat (the boards are slightly different thickness) the weld appears to have added some stability to my table top. Made a nice multi color split beam reflection hologram with the new setup. I then made an image planed version with the same setup. - IT WORKS!!!
Two lasers are off the table.
Added 18 different optical components (including a couple of new items from Bruce Wegman - thanks) for my multi color split beam configuration.
Optics were used to 1. combine beams (Red and green), then 2 split the combine beam twice. This resulted in 1 combined beam (reference beam) and four object beams - 2 red and 2 green, then 3 remaining optics were to expand and steer the beams to object and plate.
Now I need to figure out how to add spatial filter to setup (when objectives and pinholes arrive)
Will post pictures of resulting hologram tomorrow!
Mark