Zoom lens

Details Zoom lens Zoom lens

1990-12-07

1993-07-06

Arnold, Bruce Y.

Optical: systems and elements

Lens

With variable magnification

359676, 359686, G02B 1514

Patent

active

052259374

ABSTRACT:
A zoom lens is disclosed comprising, from front to rear, a first lens unit of positive power, a second lens unit of negative power, a third lens unit of negative power and a fourth lens unit of positive power, zooming being performed by moving the second and third lens units axially in differential relation, whereby the focal length F2 of the second lens unit lies in the following range:

REFERENCES:
patent: 4525036 (1985-06-01), Fujibayashi et al.
patent: 4618219 (1986-10-01), Sugiura et al.
patent: 4802747 (1989-02-01), Horiuchi
patent: 4832471 (1989-05-01), Hamano
patent: 4846563 (1989-07-01), Mukaiya
patent: 4854684 (1989-08-01), Horiuchi
patent: 4892397 (1990-01-01), Horiuchi
patent: 4934796 (1990-06-01), Suguira et al.
patent: 4988174 (1991-01-01), Horiuchi et al.

Affiliated with

Also associated with

Rating

Zoom lens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Zoom lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom lens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1694316