Small-size telescopic lens

Details Small-size telescopic lens Small-size telescopic lens

1982-09-10

1984-08-14

Corbin, John K.

G02B 960, G02B 1302

Patent

active

044653450

ABSTRACT:
A small-size telescopic lens system with a brightness of 1:4, an angle of view of .+-.6.degree., and a telescopic ratio of about 0.8, which is constructed of front and back groups of lens elements, is disclosed. The first, second, third, fourth and fifth lens elements are aligned from the object side to the image side. The first, second and third lens elements make up the front group, while the fourth and fifth lens elements make up the back group.
The first lens element is a biconvex lens, the second lens element is a biconcave lens, the third lens element is a convex meniscus lens which is convex towards the object, the fourth lens element is a biconcave lens, and the fifth lens element is a biconvex lens.

REFERENCES:
patent: 3502394 (1970-03-01), Kobayashi
patent: 3966307 (1976-06-01), Tojyo
patent: 4338001 (1982-07-01), Matsui

Affiliated with

Also associated with

Rating

Small-size telescopic 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 Small-size telescopic lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Small-size telescopic lens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-111519