Operation microscope

Details Operation microscope Operation microscope

1999-07-08

2000-10-03

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

A61B 310

Patent

active

061262870

ABSTRACT:
A light-shielding member is provided at an optically conjugative position with an optical system composed of optical components (including a corneal convex mirror) interposed between an entrance pupil and the light-shielding member on an optical path of an illumination optical system in order to prevent a virtual image of a light source from being observed in an observation optical system. The position where the light-shielding member is located is the vicinity of an illumination field stop and closer to the eye to be examined than the illumination field stop. A size of the light-shielding member is theoretically determined by a product of a diameter of the entrance pupil of the observation optical system, and an observation magnification of the optical system composed of the corneal convex mirror and a relay lens.

REFERENCES:
patent: 4753526 (1988-06-01), Koester
patent: 5386258 (1995-01-01), Nagano
patent: 5555040 (1996-09-01), Kaneko
patent: 5557351 (1996-09-01), Kasahara et al.
patent: 5801807 (1998-09-01), Satake et al.
patent: 5914771 (1999-06-01), Biber

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-188261