Optical: systems and elements – Lens – Multiple component lenses
Patent
1996-09-27
1998-08-18
Font, Frank G.
Optical: systems and elements
Lens
Multiple component lenses
359759, 359751, G02B 962, G02B 1304
Patent
active
057965293
ABSTRACT:
A fast photographic lens system comprises a first lens having a positive refractive power, a convex-shaped outer face and a flat inner face; a second lens having a positive refractive power, a convex-shaped outer face and a concave-shaped inner face; a third lens having a negative refractive power, a slightly convex-shaped outer face, and a concave-shaped inner face; a fourth lens having a negative refractive power and a concave-shaped inner face; a fifth lens, joined with the fourth lens, and having a positive refractive power, a relatively flat inner face and a convex-shaped outer face; a sixth lens having a positive refractive power, a slightly concave-shaped inner face and a convex-shaped outer face; and a seventh lens, having both convex-shaped inner and outer faces.
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Font Frank G.
Samsung Aerospace Industries Ltd.
Stafiro Michael P.
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