Patent · US Expired

Joystick override control for an ophthalmic instrument

US5587748A · kind A · utility

34Cited by
2References
9Claims
0Family size

Assignee

Inventors

Key dates

Filing dateOct 28, 1994
Grant dateDec 24, 1996
Priority date—
Expiry dateOct 28, 2014

Classification

  • Technology area (CPC A)Human Necessities
  • CPC primaryA61B3/152
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

An alignment override control for effecting automatic vertical alignment of a test axis of an ophthalmic instrument with the center of an eye is disclosed. The test axis is associated with optical alignment means of the instrument vertically movable by an elevation motor controlled by a motor drive. A joystick and a pair of directional switches are connected to the motor drive for manual positioning of the test axis. When the eye comes within a field of view defined by the optical means, the override control disconnects the switches and automatically signals the elevation motor to effect automatic alignment using signal information originating from the optical means.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.