Zoom lens for super 8 film

Details Zoom lens for super 8 film Zoom lens for super 8 film

1975-12-18

1977-05-31

Sacher, Paul A.

G02B 1516

Patent

active

RE0292370

ABSTRACT:
A main lens unit having a fixed focal length and consisting of a positive lens member is preceded by an afocal forward lens unit having a variable magnification and consisting of a positive forward lens member, a negative intermediate lens member which is axially movable to change the magnification, and a positive rear lens member. The intermediate lens member is arranged to direct divergent bundles of rays to said rear lens member. The rear lens member is arranged to convert said divergent bundles or rays into bundles of rays which are substantially parallel to the optical axis of the lens and to direct them to said main lens unit. The forward lens member is axially movable to control the position of the image plane. The lens is designed to meet the condition

REFERENCES:
patent: 3074317 (1963-01-01), Cox et al.
patent: 3506337 (1970-04-01), Takahashi
patent: 3580662 (1971-05-01), Scholz

Affiliated with

Also associated with

Rating

Zoom lens for super 8 film 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 for super 8 film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom lens for super 8 film will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-648656