Zoom lens assembly with two movable focusing lens groups

Details Zoom lens assembly with two movable focusing lens groups Zoom lens assembly with two movable focusing lens groups

1979-11-09

1982-03-09

Corbin, John K.

G02B 710

Patent

active

043185932

ABSTRACT:
In the disclosed zoom lens assembly containing focusing optics, a variable magnification lens group and an image forming lens group, the focusing optics are divided into a first movable focusing lens group and a second movable focusing lens group, while a control device operatively engaged with a focusing mechanism moves the first and the second movable lens groups a predetermined amount in order to compensate for changes in the picture angle during the focusing operation.

REFERENCES:
patent: 4179191 (1979-12-01), Freudenschuss

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