Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Reexamination Certificate
2005-12-13
2005-12-13
Casler, Brian L. (Department: 3737)
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
C351S211000
Reexamination Certificate
active
06974215
ABSTRACT:
An optical instrument comprising an eye refractive power measurement index optical system (50) for projecting an eye refractive power index in order to measure the refractive power of an eye (E) to be examined, a fixed index projecting optical system (10) for fixing/fogging the eye (E), an observation optical system (40) for observing the eye (E), a light receiving optical system (60), a ring plate (30) and an infrared LED (34) for projecting a cornea shape index used to measure the cornea shape of the eye (E), a ring plate (80) and an infrared LED (84) for projecting light to the center of the cornea via an objective lens (22), and an alignment index projecting optical system (70), whereby it is possible to project part of the cornea shape index onto the cornea (Ec) of the eye to be examined via the objective lens (22) of the observation optical system (40) for observation.
REFERENCES:
patent: 5684562 (1997-11-01), Fujieda
patent: 5907388 (1999-05-01), Fujieda
patent: 6190011 (2001-02-01), Fujieda
patent: 6224213 (2001-05-01), Kobayashi
patent: 4-505411 (1992-09-01), None
patent: 8-164113 (1996-06-01), None
patent: 11-137520 (1999-05-01), None
patent: 2000-70222 (2000-03-01), None
patent: 2000-296110 (2000-10-01), None
patent: 2000-308617 (2000-11-01), None
patent: 2001-46340 (2001-02-01), None
patent: 2001-120503 (2001-05-01), None
patent: 2001-269314 (2001-10-01), None
Armstrong Kratz Quintos Hanson & Brooks, LLP
Casler Brian L.
Kabushiki Kaisha Topcon
Sanders John R.
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