Viewfinder with field of view indicating frame

Details Viewfinder with field of view indicating frame Viewfinder with field of view indicating frame

1991-04-02

1993-06-08

Griffin, Donald A.

G03B 1304

Patent

active

052183939

ABSTRACT:
A viewfinder includes an objective lens, an eyepiece lens, and an indication frame which can be observed through the eyepiece together with an image of an object formed by the objective lens. An optical member is provided having a light incident surface and a light emergent surface. The indication frame can be located to extend between the incident and emergent surfaces. According to one embodiment of the present invention, the thickness of the optical member is greater than the image forming range of the viewfinder. According to another embodiment of the present invention, the indication frame is contained within a bright frame plate made of plain parallel plates of transparent material.

REFERENCES:
patent: 4003637 (1977-01-01), Masuoka
patent: 4545655 (1985-10-01), Fantone et al.
patent: 4557578 (1985-12-01), Seely
patent: 4650293 (1987-03-01), Kimura et al.
patent: 4707098 (1987-11-01), Wakamiya
patent: 4891658 (1990-01-01), Goddard
patent: 4893141 (1990-01-01), Smart
patent: 4967219 (1990-10-01), Morisawa et al.

Affiliated with

Also associated with

Rating

Viewfinder with field of view indicating frame does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1945435