Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Reexamination Certificate
2001-10-09
2008-10-28
Sugarman, Scott J. (Department: 2873)
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
C351S205000, C351S215000, C356S454000
Reexamination Certificate
active
07441898
ABSTRACT:
The eye is positioned relative to a detection device in such a manner as to co-operate with the device to form a Fabry-Perot cavity having a main optical axis and comprising two opposite reflecting faces on the main optical axis, one of these two faces being constituted by a stationary reflecting element and the other being formed by the cornea of the eye. An incident laser beam is injected into said cavity so as to be centered on the main optical axis of the Fabry-Perot cavity, the cornea is aligned laterally and longitudinally relative to the main optical axis in such a manner as to obtain longitudinal interference between the go and the return laser beams reflected between the two reflecting faces of the cavity, and an optoelectronic detector is used to detect the intensity I of said interference as a function of time. The invention is applicable to measuring intraocular pressure.
REFERENCES:
patent: 3158674 (1964-11-01), Woodson
patent: 5148807 (1992-09-01), Hsu
patent: 5638176 (1997-06-01), Hobbs et al.
patent: 5975699 (1999-11-01), Hellmuth
patent: 196 47 114 (1998-05-01), None
patent: WO 96 32054 (1996-10-01), None
Debut Alexis
Dubois Patrick
Elena Pierre-Paul
Rouland Jean-François
Zemmouri Jaouad
Centre Hospitalier Regional Universitaire de Lille
Greece James R
Pharma Iris
Sugarman Scott J.
Universite des Sciences et Technologies de Lille
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