Patent Model - Improvement in Fluid Lenses

Maker and role
David Woodward, Patentee
Production date
Nov 27 1866
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Object detail

Brass, glass
2 x 11 3/4" (5.1 x 29.8cm)
Woodward's invention "consists in bending circular disks of polished flattened or plate glass to any required curvature, either spherical or parabolical, and afterwards cementing and firmly securing them together by means of rings or bands of metal, or other suitable material, thus forming cells for holding fluids, whereby a fluid lens, or any combination of fluid lenses, may be made of any required focus, and of a size much larger than can be made of solid glass..." (Patent Number 60,109)
Object number
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