Wafer thin reading telescope

Details Wafer thin reading telescope Wafer thin reading telescope

1989-08-14

1991-07-02

Dzierzynski, Paul M.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Combined

351 57, 350145, G02C 100

Patent

active

050281275

ABSTRACT:
A wafer thin reading telescope utilizing a unique parallelogram shaped prism, together with plus and minus lenses comprises a Galilean reading telescope. The telescope is mounted in the bifocal region of an eyeglasses lens at an approximately 221/2 degree downward angle relative to the straight ahead gaze. The reading telescope is sufficiently small and light weight in nature so as to be mountable to the back surface of the carrier lens by the use of adhesive. The eyepiece and objective lenses are truncated vertically to provide a wide horizontal field of view relative to the vertical field of view. The telescope is capable of magnifying objects to a power of about 2.5.times. to about 4.times. and is focusable by moving the image or alternatively by reciprocating the eyepiece lens within a threaded collar. The telescope can be enclosed within a housing.

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patent: 4795235 (1989-01-01), Spitzberg
Kollmorgen Optical Corporation, Spectel; Aids to Sub-Normal Vision.
Optical Designs, Inc., Behind-the-Lens Telescope, Oct. 1988 Houston, Texas.
Edwards Optical Corporation, BITA Low Vision Enhancer, Virginia Beach, Virginia (date unknown).

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