Building a new plate holder

erose · Post by **erose** » Sun Jan 16, 2011 11:26 am

I am designing a new plate holder. It will be for 4x5 plates. I wonder if anyone has suggestions for the best way to actually secure the plates? It seems there are two options for the "clamping" of the plate: One would put tension across the width of the plate, edge to edge. The other would grab the edges front to back.

The part that is making me crazy is that I built plate holders many years ago and used them very successfully. But I gave them to Rudie Berkhout to use at the School of Visual Arts in NYC and after he died have no idea what happened to them. I can not find any drawings or photos of them either. I remember the general construction was aluminum angle, bar and thumb screws.

Suggestions, photos or new ideas are all welcome as I try not to redesign the wheel.

holomaker · Post by **holomaker** » Sun Jan 16, 2011 4:53 pm

i suggest you contact Linda Law as she seems to be runnig things for Rudies estate,i dont have Linda's email addy. but she can be found thru the http://holography.ning.com ,(you will need to signed up first).

Johnfp · Post by **Johnfp** » Tue Jan 18, 2011 8:28 am

Here is mine.
http://www.holograms3d.com/Illustration ... holder.jpg

erose · Post by **erose** » Tue Jan 18, 2011 9:00 am

Thanks John. I take it you shoot sideways? By that I mean with the reference beam coming in from the right or left.

Vidar · Post by **Vidar** » Tue Jan 18, 2011 9:33 am

Here's how I made mine from concrete: http://www.techsoft.no/holography/holder.htm

Johnfp · Post by **Johnfp** » Tue Jan 18, 2011 9:50 am

With this plateholder, you can shoot on either side or from top.

erose · Post by **erose** » Tue Jan 18, 2011 10:17 am

Concrete! I am impressed. For what I am doing it will be mostly SB reflections and I want as little shadow as possible from the holder. Both of those would work well.

Johnfp · Post by **Johnfp** » Tue Jan 18, 2011 10:30 am

Well then, if you are only shooting SBR, why take all the trouble to make a plateholder. Just use this technique. It is by far more stable then a plateholder and object not touching. Basically, rest the plate directly on the object.

http://www.holograms3d.com/Illustration ... Single.jpg

erose · Post by **erose** » Tue Jan 18, 2011 12:33 pm

Yes I know that technique. But I want to be able to position the plate in relationship to objects with a bit more control. I've shot plenty of SBRs. I also want this plate holder to function for other types of holograms including holding H2s for both transmission and reflection copies. I'll get around to building larger plate holders eventually for masters.

holomaker · Post by **holomaker** » Tue Jan 18, 2011 2:12 pm

heres a jig i use with for one beams........