Illuminated ring device

Details Illuminated ring device Illuminated ring device

1990-03-13

1991-05-28

Dzierzynski, Paul M.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

A61B 310

Patent

active

050188500

ABSTRACT:
A cylindrical keratoscope is provided with an improved structure for illuminating the rings disposed along the length of its bore by having the light-transmitting rings defined as the lands between a series of opaquely coated, incised circular grooves in the bore. A circular, fluorescent, light tube is disposed in an aluminum light box having a semi-toroidal concavity provided with a light-reflecting surface to direct or collimate the light from the tube toward the light-receiving base of the device.

REFERENCES:
patent: 3932030 (1976-01-01), Hasegawa et al.
patent: 4772115 (1988-09-01), Gersten et al.

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-31796