Ophthalmic lens centering device

Details Ophthalmic lens centering device Ophthalmic lens centering device

1987-11-20

1989-01-17

Evans, F. L.

Optics: measuring and testing

Lens or reflective image former testing

Optical center, cylinder axis, or prism measuring or...

356392, G01B 900

Patent

active

047984597

ABSTRACT:
An opthalmic lens centering device comprises a frame on which is a translucent first support plate which receives an opthalmic lens to be centered. There is a frosted screen at the base of the first support plate. A projector system above the first support plate projects an image of the ophtlalmic lens onto the frosted screen. A first observation channel and an opening in the frame enable an operator to view the frosted screen. A second support plate receives a template with which the opthalmic lens is to be compared. A second observation channel in conjunction with the same opening in the frame enables the operator to view the second support plate. The first and second observation channels have a common emergent section of which the opening in the frame forms part. There is a recess in the frame, opening onto its front surface, by means of which the second support plate is disposed at the front of the frame.

REFERENCES:
patent: 3645632 (1972-02-01), Schmidt et al.
patent: 3858982 (1975-01-01), Meckler

Affiliated with

Also associated with

Rating

Ophthalmic lens centering 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 Ophthalmic lens centering device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ophthalmic lens centering device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2411734