Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Reexamination Certificate
2005-12-02
2010-12-14
Sugarman, Scott J (Department: 2873)
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
C351S210000, C351S221000
Reexamination Certificate
active
07850305
ABSTRACT:
The object of the invention is to provide a favorable spectral characteristic that reduces variation depending on the frequency of received light intensity, and that is gentle on a subject eye. It also eliminates displacement between positions of respective spectral images of the same part even if a change in alignment occurs between the eye and apparatus with the lapse of time. An apparatus1for measuring spectral fundus image data of this invention comprises: an illumination optical system10having an illumination light source11that emits a light beam in a specified wavelength range; a light receiving optical system20for forming a fundus image on the light receiving surface of a photographing section4; a liquid crystal wavelength tunable filter32capable of choosing a wavelength of a transmitted light beam in a specified wavelength range; a spectral characteristic correction filter13having wavelength characteristic for correcting the wavelength characteristic of the emitted light intensity of the illumination light source11and the transmission wavelength characteristic of the wavelength tunable filter32so that the received light intensity on the light receiving surface is kept within the specified range; and a data measuring section7for taking the spectral fundus image data from the light receiving surface while changing the wavelength of the light beam passing through the wavelength tunable filter32.
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Aoki Hiroyuki
Hirohara Yoko
Mihashi Toshifumi
Tsuruga Yasuko
Yamaguchi Tatsuo
Foley & Lardner LLP
Pinkney Dawayne A
Sugarman Scott J
Topcon Corporation
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