Apparatus for tracking the human eye with a retinal scanning dis

Details Apparatus for tracking the human eye with a retinal scanning dis Apparatus for tracking the human eye with a retinal scanning dis

1999-08-09

2000-09-19

O'Connor, Cary

Surgery

Diagnostic testing

Eye or testing by visual stimulus

351209, A61B 500

Patent

active

061204617

ABSTRACT:
A retinal scanning display, an active-pixel image sensor array, and an im processor track the movements of the human eye. The scanning nature of the display acts as a sequential source of eye illumination. The active-pixel image sensor array is directed toward the cornea of the eye through a matrix of micro-lens. The sensor is integrated with a comparator array which is interfaced to bilateral switches. An element address encoder and latch determines the sensor element which reaches maximum intensity during the raster-scan period of the display driver. Over a display field refresh cycle, the invention maps the corneal surface to a data table by pairing sensor activations to the specular reflections from the cornea of the sequenced source lights.

REFERENCES:
patent: 3628193 (1971-12-01), Collins
patent: 3766311 (1973-10-01), Boll
patent: 5410376 (1995-04-01), Cornsweet et al.
patent: 5583795 (1996-12-01), Smyth
patent: 5649061 (1997-07-01), Smyth
patent: 5895415 (1999-04-01), Chow et al.

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