Projection lens system with variable air space

Details Projection lens system with variable air space Projection lens system with variable air space

1986-10-15

1988-10-11

Corbin, John K.

350412, 350255, G02B 962, G02B 300, G02B 702

Patent

active

047766824

ABSTRACT:
A projection lens system comprises a first group of lenses having at least one variable spacing for correcting aberration, and a second group of lenses having a variable spacing for focusing with the lens located closest to an image being fixed. It corrects variation of aberration and allows variable projection magnification.

REFERENCES:
patent: 3868173 (1975-02-01), Miles et al.
patent: 3926504 (1975-12-01), Fleischman
patent: 4076390 (1978-02-01), Fleischman
patent: 4124276 (1978-11-01), Okano et al.

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