Motorized instrument for the examination of human eyes

Details Motorized instrument for the examination of human eyes Motorized instrument for the examination of human eyes

1995-07-13

1997-07-15

Dang, Hung X.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351233, 351234, A61B 302

Patent

active

056488335

ABSTRACT:
A phoropter comprises two observation channels, in each of said observation channels a plurality of disk-shaped mounts, rotatably seated about at least one axis, for mounting optically effective members and drive means for rotating said mounts. The drive means are piezoelectric motors, each of which is, on the one hand, connected to a base and, on the other hand, provided with a driving end portion, preferably a driven member which executes a rotating motion. The driven member is, compared to the piezoelectric motor, of small design.

REFERENCES:
patent: 4496225 (1985-01-01), Augusto
patent: 4798457 (1989-01-01), Morohashi et al.
New Type of Piezoelectric Ultrasonic Motor by Fleischer et al -IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 36, No. 6 Nov. 1989.

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