Variable magnification lens system

Details Variable magnification lens system Variable magnification lens system

1976-09-01

1978-07-11

Clark, Conrad J.

G02B 1514

Patent

active

040998460

ABSTRACT:
In a variable focus objective an axial air space between a negative front lens and a positive rear lens component is variable for zooming. The first component is movable for focusing independently of the rear component and provided with a variable air space defined therein to facilitate focusing down to short object distances while preserving high grade imagery for close objects throughout the zooming range and assuring a good uniformity of image quality throughout the entire image region even at the full open aperture.

REFERENCES:
patent: 3143590 (1964-08-01), Higuchi
patent: 3632188 (1972-01-01), Nakamura

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