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US 7,244,025 B2Granted
Eye's optical characteristics measuring system
AssigneeTopcon Corporation
InventorsKouji Nishio, Yasufumi Fukuma, Katsuhiko Kobayashi
Life of this patent
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AssigneeTopcon Corporation
InventorsKouji Nishio, Yasufumi Fukuma, Katsuhiko Kobayashi
Estimating the term…
An eye's optical characteristics measuring system, comprising a first target projection optical system for projecting a target image on a fundus of an eye under test, a first photodetecting means for receiving the target image reflected from the fundus of the eye under test from the first target image projecting optical system, an ocular refractive power measuring unit for measuring ocular refractive power of the eye under test based on photodetection result from the first photodetecting means, a second target projecting means for projecting a spot-like target image to the fundus of the eye under test, a second photodetecting means for receiving the target image reflected from the fundus of the eye under test, and an eye's optical characteristics measuring unit for measuring ocular refractive power based on two or more images acquired at a predetermined refractive degree pitch before and after centering the refractive degree of the eye under test obtained by the second photodetecting means.
An eye's optical characteristics measuring system, comprising a first target projection optical system for projecting a target image on a fundus of an eye under test, a first photodetecting means for receiving the target image reflected from the fundus of the eye under test from said first target projection optical system, an ocular refractive power measuring unit for measuring ocular refractive power of the eye under test based on the photodetection result from said first photodetecting means, a second target projection optical system for projecting a spot-like target image to the fundus of the eye under test, a second photodetecting means for receiving the target image reflected from the fundus of the eye under test, and an eye's optical characteristics measuring unit for measuring ocular refractive power based on two or more images acquired at a predetermined refractive degree pitch before and after centering the value of the refractive degree of the eye under test obtained by said second photodetecting means.
An eye's optical characteristics measuring method, comprising a first step of projecting a target image on a fundus of an eye under test, a second step of receiving the target image reflected from the fundus of the eye under test from a first target projection optical system, a third step of measuring ocular refractive power of the eye under test based on photodetection result, a fourth step of projecting a spot-like target image to the fundus of the eye under test, a fifth step of receiving the target image reflected from the fundus of the eye under test, a sixth step of acquiring two or more images at a predetermined refractive degree pitch before and after centering the value of the refractive degree of the eye under test obtained, and a seventh step of measuring ocular refractive power based on two or more images acquired.
Dependencies are inferred from the claim text.