NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Goniometric Stage
From: Norm Goldblatt
Date: 2013 Aug 26, 21:23 -0700
From: Norm Goldblatt
Date: 2013 Aug 26, 21:23 -0700
Not necessarily relevant, but maybe folks would be interested in this device, used extensively in optics labs.
Here, the 'arc' rotates about a specific point at the center, at which anything can be placed. It's called a virtual pivot point.
http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=860
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