Sam Goldwasser, Jeffrey Murray and Joy and Dinesh! All have gone above and beyond in helping with advice, expertise and equipment!
Thanx to your help I'll now be spending wonderful hours in the dark , scratching my head, wondering what to change next, and loving it!
BTW... I finished my table and (this time) it turned-out perfect!
If any are contemplating building their own table I'll be happy to go into details on mine.
Bruce/San Diego
A quick note of thanks to...
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Michael Harrison
A quick note of thanks to...
Even though I'm not planning on re-re-rebuilding my table any time soon, I'm still interested on what you did for yours.
Post some pictures and details!
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If someone says it can't be done but they haven't tried it, don't believe them.
http://www.dragonseye.com/Holography
Post some pictures and details!
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If someone says it can't be done but they haven't tried it, don't believe them.
http://www.dragonseye.com/Holography
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bruce
A quick note of thanks to...
Photos here : http://f2.pg.briefcase.yahoo.com/bconst ... global.net
Table working size is 6'X4'
Starting at floor and following vibration path to optics....
2 pieces of short nap carpet, face to face, 1 piece 3/4 ext. ply, table frame is shelving from home depot store (surplus with 2500 lb. capacity) both table tops are 5/8 (MDF?) fiberboard,reinforced with 2"X4" bracing underneath, 6 13" auto tire tubes with very low pressure, sand box is also MDF fiberboard held together with drywall screws and corner blocking as bracing, 3" washed sand, 3" poured in place 3500 psi concrete with metal mesh, sand then filled to 1/2" of top of concrete surface to deaden plate ringing, 1/8" steel plate bonded with latex caulk to concrete (not shown).
I ran an interferometer at each step and general placement of table on the garage floor was important, sand made a big difference also but lacked rigidity, concrete plate gave me all that I needed. Table is dead steady while walking around it, you can even tap your foot on the floor. Light pressure on table support structure is okay but no contact with box structure is advised. Settling time for this new table was about 5 days total and has now taken a set. Shroud assy. is made of 2" PVC, unglued and not touching the table anywhere and shroud is bedsheet material (probably not the best idea as 100 mw unfocused could be a fire hazard without tight beam control).
All metal shelving was purchased for $50. and size is apprx. 8'X4'
More shelving is available for purchase, contact me.
Bruce
Table working size is 6'X4'
Starting at floor and following vibration path to optics....
2 pieces of short nap carpet, face to face, 1 piece 3/4 ext. ply, table frame is shelving from home depot store (surplus with 2500 lb. capacity) both table tops are 5/8 (MDF?) fiberboard,reinforced with 2"X4" bracing underneath, 6 13" auto tire tubes with very low pressure, sand box is also MDF fiberboard held together with drywall screws and corner blocking as bracing, 3" washed sand, 3" poured in place 3500 psi concrete with metal mesh, sand then filled to 1/2" of top of concrete surface to deaden plate ringing, 1/8" steel plate bonded with latex caulk to concrete (not shown).
I ran an interferometer at each step and general placement of table on the garage floor was important, sand made a big difference also but lacked rigidity, concrete plate gave me all that I needed. Table is dead steady while walking around it, you can even tap your foot on the floor. Light pressure on table support structure is okay but no contact with box structure is advised. Settling time for this new table was about 5 days total and has now taken a set. Shroud assy. is made of 2" PVC, unglued and not touching the table anywhere and shroud is bedsheet material (probably not the best idea as 100 mw unfocused could be a fire hazard without tight beam control).
All metal shelving was purchased for $50. and size is apprx. 8'X4'
More shelving is available for purchase, contact me.
Bruce
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Colin Kaminski
A quick note of thanks to...
Nice work! I have always wondered of palette racking would ring. I like the use of sand. It will make for very short settle times. Perhaps there is an automated stereogram printer in your future?
Be careful with your inner tubes. I have found that if I let them hang over an edge I get a leak in a short amount of time.
Be careful with your inner tubes. I have found that if I let them hang over an edge I get a leak in a short amount of time.