The lightbox was made by pulling apart the 3D World mounting jig and using various parts from it

Harry Calderbank of Australia provides the following description of an LED illuminated light box for his 3D World stereo viewer (this is the same viewer I have sometimes called the MFPV) -- January 2, 2007 John Thurston, Juneau Alaska

The lightbox was made by pulling apart the 3D World mounting jig and using various parts from it. The jig's diffuser works very well with the LED panel so I decided to build around that, using most of the existing frame behind the diffuser. The spring clip LED holder was removed from the existing door and moved on to the frame. The door was then ditched. I shortened the bottom of the frame a little leaving just enough room for a battery pack and a momentary switch. I decided to position this switch on the underneath side so that the weight of the viewer made it easy to push in the switch with the left thumb. When the outside cover is in place, the switch is recessed so it won't be depressed accidentally.

slide out battery pack.JPG (117960 bytes)

The diffuser from the hand held viewer was cut out to fit over the the whole frame and was glued on with an epoxy glue. This still leaves it possible to pull off the viewer itself to clean the diffuser. A couple of screws through the outside slide on cover ( just a lightweight box made from MDF or particle board) hold it all together. Removing this cover gives easy access to the batteries and leaves room to replace the LED panel if necessary.

It's a little bulkier than I would have liked but it seems that the LED panel works best when there is a little space between it and the diffuser. Overall, it is still easy to hold and it is a very nice level of brightness.

The rest of the 3D World mounting jig was raided for parts to add to my existing light panel that I use for mounting. The lens holder mounted easily on to a hinge and I added some spring clips to hold the chips in place. 2 photos of this are attached.

Harry Calderbank

interior without cover.JPG (115511 bytes)