Magnifying projecting lens

Details Magnifying projecting lens Magnifying projecting lens

1993-01-27

1994-01-11

Henry, Jon W.

Optical: systems and elements

Lens

With variable magnification

359651, 359689, 359751, 359753, G02B 912, G02B 1304, G02B 15177

Patent

active

052786986

ABSTRACT:
A magnifying projecting lens has a negative first lens group, a positive second lens group and a positive third lens group that is arranged in this order from a magnifying side. The lens groups are arranged so as to satisfy the following condition:

REFERENCES:
patent: 4824223 (1989-04-01), Doctor et al.
patent: 4838666 (1989-06-01), Shiraishi
patent: 4934794 (1990-06-01), Ueda
patent: 4938572 (1990-07-01), Iwasaki
patent: 4957355 (1990-09-01), Sato
patent: 4993814 (1991-02-01), Hata
patent: 5015077 (1991-05-01), Ueda
patent: 5042929 (1991-08-01), Tanaka et al.

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