Hand held adjustable viewer

[P3D Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Thu, 9 Jan 1997 15:23:47 -0500 (EST)
>From: P3D  <PTWW@xxxxxxx>
>To: photo-3d@xxxxxxxxxxxxxxx
>Subject: Re: Screen too large
>Message-ID: <970109151943_1044474145@xxxxxxxxxxxxxxxxxxxx>
>
>Larry Berlin tantalizes us with:
>
>> One of these days I'll put up a page about my hand-made fully
>>adjustable viewer...
>
>Please tell us more, Larry!
>
>Paul Talbot

First a basic description. You'll have to wait for the illustrations or
photos. Since others on this list are making new viewers that sound
fantastic, I'm sure this doesn't qualify as exceptional, but it is handy and
it works.

I built it originally to assist the process of teaching freeviewing of
stereograms. As such I was interested in having NO magnification so I made
it with front surfaced mirrors. I got some aluminm channel material from the
same place as I mention in a previous post and arranged it to form a top and
bottom for the viewer. It's held together with small screws through areas
where the material overlapped. I cut out eye holes in one side and much
wider ones in the other. The two ends are open and the adjustment lever
sticks out a bit on the right side.

The first two mirrors are fixed in front of the eyes and the other two are
hinged and tied together with a small lever mechanism so that while viewing
I can easily change the angle of the mirrors. It's full range is from wider
than parallel to very crossed.

The roughest part of it's current condition is that somehow in handling and
taking apart a time or two, it's mirrors are no longer as precisely aligned.
This is fixable however. 

Later I will put up some drawings of the geometry so anyone could duplicate
it if they had the tools and the will to experiment. There are times this
device has been very worthwhile to have around. I use it somewhat less since
I got used to viewing in crossed mode. Now it's usually for print
photography or computer displays that are too large to comfortably fuse
without assistance.

After building this device I changed to a preference for prism glasses for
stereogram training. Later yet I decided transparent stereograms were even
better.

Larry Berlin

Email: lberlin@xxxxxxxxx
http://www.sonic.net/~lberlin/
http://3dzine.simplenet.com/


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