Optical: systems and elements – Lens – Multiple component lenses
Patent
1995-12-22
1997-07-22
Epps, Georgia Y.
Optical: systems and elements
Lens
Multiple component lenses
359740, 359754, 359774, 359771, G02B 912, G02B 934, G02B 908
Patent
active
056508786
ABSTRACT:
A compact lens system has a predetermined focal length and comprises a plurality of lens elements and an internal aperture stop. The lens system is asymmetrical about the aperture stop. The plurality of lens elements define a field of view of at least 10 degrees. The plurality of lens elements include a front lens element, a rear lens element and at least one lens element located between the rear and the front lens elements. The rear lens element defines a rear vertex and a rear surface clear aperture with a predetermined diameter. The front lens element defines a front vertex and a front surface clear aperture with a predetermined diameter. The front and rear vertices are spaced apart less than 20% of the lens system's focal length. The front surface clear aperture diameter is within 10% of the rear surface clear aperture diameter.
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Eastman Kodak Company
Epps Georgia Y.
Lester Evelyn A.
Short Svetlana Z.
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