High speed telephoto lens system

Details High speed telephoto lens system High speed telephoto lens system

1978-09-21

1980-07-29

Clark, Conrad J.

G02B 1302

Patent

active

042148162

ABSTRACT:
An improved compact high speed telephoto lens system of a modified Ernostar type is provided, having from the object to the image side of the lens system, a first lens of a positive meniscus shape, convex to the object side; a second lens of a positive meniscus shape, convex to the object side; a third lens of a negative meniscus shape, convex to the object side; a fourth lens of a negative meniscus shape, convex to the object side; and a fifth lens of a positive refractive power. The fourth lens can be a doublet in an alternative embodiment. A positive Petzval sum is provided to insure an appropriate field curvature while permitting the refractive index of the positive lenses to be sufficiently high to correct coma and astigmatism.

REFERENCES:
patent: 2363712 (1944-11-01), Warmisham et al.
patent: 3749478 (1973-07-01), Nakagawa
patent: 3761161 (1973-09-01), Nakagawa

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-902190