Reproduction lens having a six group six element composition a l

Details Reproduction lens having a six group six element composition a l Reproduction lens having a six group six element composition a l

1980-03-12

1982-08-24

Evans, F. L.

350450, G02B 962

Patent

active

043458238

ABSTRACT:
A reproduction lens assembly including two groups of three elements for providing a large aperture efficiency and a compact size formed by arranging a lens system symmetrically with respect to a stop wherein the each group of three elements further comprise a first convex Meniscus lens having a concave surface thereof directed toward the stop, the stop being positioned on the front side of the first Meniscus lens, a second concave Meniscus lens having a concave surface thereof directed toward the stop and a third convex Meniscus lens having a concave surface thereof directed toward the stop with a small air gap the third and second Meniscus lens.

REFERENCES:
patent: 3088371 (1963-05-01), Lowenthal
patent: 3185031 (1965-05-01), Betensky et al.
patent: 3871749 (1975-03-01), Harada
patent: 4013348 (1977-03-01), Yamada

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