Control for optical system having multiple focal lengths

Details Control for optical system having multiple focal lengths Control for optical system having multiple focal lengths

1993-03-01

1994-09-20

Ben, Loha

Optical: systems and elements

Lens

With variable magnification

359557, 359683, 359823, G02B 1514, G02B 702, G02B 2764

Patent

active

053494768

ABSTRACT:
An optical system including first and second lens groups disposed for relative movement along an optical axis and coupled together by a cam and follower mechanism for controlling such relative movement to change the focal length of the optical system. The system is characterized by a mechanism for offsetting relative movement between the lens groups along the optical axis caused by lateral movement of the lens groups essentially normal to the axis, thereby to maintain the focal length constant in the presence of the lateral movement.

REFERENCES:
patent: 1998367 (1935-01-01), Wenczler
patent: 3051048 (1962-08-01), Mahn
patent: 3480349 (1969-11-01), Himmelsbach
patent: 3533344 (1970-10-01), Thomas
patent: 3550518 (1970-12-01), Himmelsbach
patent: 4391496 (1983-07-01), Schilling et al.
patent: 4757372 (1988-07-01), Betensky et al.
patent: 4971427 (1990-11-01), Takamura et al.
patent: 4980771 (1990-12-01), Komatsuzaki et al.
patent: 5000549 (1991-03-01), Yamazaki

Affiliated with

Also associated with

Rating

Control for optical system having multiple focal lengths does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control for optical system having multiple focal lengths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control for optical system having multiple focal lengths will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2430400