Retrofocus type lens

Details Retrofocus type lens Retrofocus type lens

1992-10-16

1994-04-12

Arnold, Bruce Y.

Optical: systems and elements

Lens

Reverse telephoto

359793, G02B 1304

Patent

active

053030885

ABSTRACT:
A retrofocus type lens includes, in order from the screen side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive power with a longest air separation in the lens system left therebetween, wherein a lens positioned closest to the screen side in the second lens unit is formed to a meniscus positive lens convex toward the screen side.

REFERENCES:
patent: 2927506 (1960-03-01), Determann
patent: 3099701 (1963-07-01), Merigold
patent: 5134524 (1992-07-01), Hamano et al.

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