Rapid switching slit scan image capture system

Details Rapid switching slit scan image capture system Rapid switching slit scan image capture system

2008-03-25

2008-03-25

Mai, Huy (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S177000, C351S221000

Reexamination Certificate

active

10732704

ABSTRACT:
A slit scan image capture system14or15for obtaining slit images of a patient's eye28. At least two slit masks16and18or two moving mirrors25and27are associated with at least two rapid switching light sources20and22or21and22for illuminating slit images on a patient's eye28. Two motors24and26or29and31each are connected to the slit masks16and18or movable mirrors25and27for incrementally moving the illuminated slits across the eye28to plurality of positions. A video camera30captures images of the illuminated slits on the eye28and a frame grabber32is connected to the video camera for storing the captured images. The rapid switching light sources20and22are powered-up to an approximately full power state and powered-down to an effectively off state in an amount of time less than an amount of time required by the motors24and26or29and31to move the slit masks16or18or movable mirrors25and27from one position to a next position. This minimizes the amount of time required to capture a plurality of slit images across major portions of the patient's eyes28.

REFERENCES:
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patent: 6575573 (2003-06-01), Lai et al.
patent: 6692126 (2004-02-01), Xie et al.
patent: WO 03/039332 (2003-05-01), None

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