lens with "float glass" process ?
lens with "float glass" process ?
(OP)
A small glass pellet of measured size melts on a tin (?)
bath and contracts. A large pellet gives a slightly
rounded disc, a small one a flattened sphere -- between
the two extremes there must be a combination of size, temperature, gravity etc. which gives a lens which is closest to the optically perfect one.
How to determine these data ? any use for cheap mass-produced lenses ?
bath and contracts. A large pellet gives a slightly
rounded disc, a small one a flattened sphere -- between
the two extremes there must be a combination of size, temperature, gravity etc. which gives a lens which is closest to the optically perfect one.
How to determine these data ? any use for cheap mass-produced lenses ?
<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032





RE: lens with "float glass" process ?
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RE: lens with "float glass" process ?
I am familiar with a company that uses a similar approach to make plastic lens arrays.
CV