Eyepiece

Details Eyepiece Eyepiece

1997-01-16

1998-05-05

Adams, Russell E.

Photography

With viewfinder

396382, 359422, 359432, G03B 1306, G03B 1302

Patent

active

057490082

ABSTRACT:
An eyepiece for use in a viewfinder optical system has a wide dioptric power adjustment range. The eyepiece is provided with, from a side of a secondary-image plane formed by a first, a second, and a third relay lens, a first, a second, and a third eyepiece lens having a positive, a negative, and a positive refractive power, respectively. For dioptric power adjustment, the positive first eyepiece lens or the negative second eyepiece lens is moved in an optical axis direction.

REFERENCES:
patent: 4206988 (1980-06-01), Miyamoto et al.
patent: 4217048 (1980-08-01), Egawa
patent: 4664485 (1987-05-01), Momiyama et al.
patent: 4906078 (1990-03-01), Inabata et al.
patent: 5086353 (1992-02-01), Mukai et al.
patent: 5257129 (1993-10-01), Morooka et al.
patent: 5410430 (1995-04-01), Ito et al.
patent: 5550674 (1996-08-01), Abe et al.
patent: 5621568 (1997-04-01), Hasushita et al.
patent: 5625486 (1997-04-01), Mori et al.
patent: 5625487 (1997-04-01), Hasushita et al.

Affiliated with

Also associated with

Rating

Eyepiece does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-71092