Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Combined
Patent
1993-07-20
1995-08-08
Yoo, Do Hyun
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Combined
351227, 359665, 359666, G02B 312
Patent
active
054403570
ABSTRACT:
This invention will for the first time provide a digital read-out showing the amount of diopters either Positive or Negative with a zero starting point midway between the Positive and Negative dioxter readings. The people having their eyes checked will now be able to communicate in the most accurate way with their eye doctor using an adjustment knob for each eye respectively to obtain the prescription needed. This is achieved through a specially designed lens unit and through the use of direct gear rack drives attached to the movable lenses coupled to an encoder and that is battery powered producing a DC square wave output voltage and fed into a Positive to Negative read-out display Totalizer unit with LED electronic digital read-out that is available with a scaling factor for precise conversion to diopter values for each eye respectively. The Totalizer is a computerized unit with microchip circuitry running on DC battery current which makes the Vari-Lens.TM. Phoropter unit, portable to be used anywhere in remote areas for the visual impaired. The present invention also offers the automatic fast focusing lens units either for Positive or Negative focal power actuated by newly developed high power magnets in a flexible binder. This will reduce to a minimum the amount of weight for the eyeglasses for common use. This is the greatest development to date in regard to variable focal power lens units and are the only successfully operating units of their kind for the Vari-Lens.TM. Phoropter and the automatic fast focusing eyeglasses to date.
REFERENCES:
patent: 5155508 (1992-10-01), Onufryk
patent: 5162824 (1992-11-01), Klemka
patent: 5182585 (1993-01-01), Stoner
patent: 5249002 (1993-09-01), Chou et al.
Quaglia Lawrence D.
Quaglia Lawrence D.
Yoo Do Hyun
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