Small-sized real image mode zoom finder

Details Small-sized real image mode zoom finder Small-sized real image mode zoom finder

1998-10-27

2000-07-04

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359686, 359422, 359432, 396382, 396379, G02B 1514, G02B 2300, G03B 1306, G03B 1310

Patent

active

060847204

ABSTRACT:
A real image mode zoom finder includes, in order from the object side, an objective optical system with positive refracting power having a first lens unit with negative refracting power, a second lens unit with positive refracting power, a third lens unit with positive refracting power, and a fourth lens unit with negative refracting power; an image erecting system for erecting an intermediate image formed by the objective optical system; and an ocular optical system with positive refracting power. In this case, each of lens units constituting the objective optical system is constructed with a single lens, and the object-side surface of the first lens unit is configured to be concave. Moreover, the objective optical system satisfies the following condition:

REFERENCES:
patent: 5920427 (1999-07-01), Ogata

Affiliated with

Also associated with

Rating

Small-sized real image mode zoom finder 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-sized real image mode zoom finder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Small-sized real image mode zoom finder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1491657