Fundus camera
AssigneeCanon Kabushiki Kaisha
InventorsManabu Wada, Shigeaki Ono, Shinya Tanaka
Life of this patent
Estimating the term…
Abstract
A fundus camera includes an irradiation unit including a plurality of LED elements and a fluorescent material that emits light by being excited by light emitted from the LED elements and configured to emit light that is generated by combining light emitted from the LED elements and excitation light from the fluorescent material, an illumination optical system configured to irradiate an eye fundus of a subject's eye with the light emitted by the illumination unit, an observation unit configured to form an eye fundus image by receiving light, which is emitted from the illumination unit and reflected from the eye fundus, and an imaging unit configured to pick up the eye fundus image formed by the observation unit.
Claims18
A fundus camera comprising:
- an illumination unit including a plurality of LED elements each emitting nearly blue light and a fluorescent material that is excited by light emitted from the plurality of LED elements and configured to illuminate a subject's eye with excitation light from the fluorescent material;
- and
- an imaging unit configured to take a fundus image of the subject's eye based on light reflected from the subject's eye,
- wherein a front surface and a side surface of the plurality of LED elements are covered with the fluorescent material, and
- wherein spaces among the plurality of LED elements are filled with the fluorescent material.
An ophthalmologic photographing apparatus, comprising:
- an illumination unit including a plurality of blue LED elements and a fluorescent material that covers a front surface and a side surface of the plurality of blue LED elements and emits fluorescent light by being excited by light emitted from the plurality of blue LED elements and configured to illuminate a subject's eye with visible light;
- and
- an imaging unit configured to take an image of the subject's eye based on light reflected from the subject's eye,
- wherein the illumination unit further includes a plurality of infrared LED elements that emit near-infrared light and are provided among the plurality of blue LED elements, and
- wherein the fluorescent material covers the plurality of infrared LED elements.
An ophthalmologic photographing apparatus, comprising:
- an illumination unit including a plurality of LED elements each emitting nearly blue light and a fluorescent material that covers a front surface and a side surface of the plurality of LED elements, fills spaces among the plurality of LED elements and emits fluorescent light by being excited by light emitted from the plurality of LED elements and configured to illuminate a subject's eye with visible light, and
- an imaging unit configured to take an image of the subject's eye based on light reflected from the subject's eye.
An ophthalmologic photographing apparatus comprising:
- an illumination unit including a plurality of LED elements each emitting nearly blue light and a fluorescent material that covers a front surface and a side surface of the plurality of LED elements and emits fluorescent light by being excited by light emitted from the plurality of LED elements and configured to irradiate a subject's eye with visible light;
- and
- a light quantity control unit configured to independently control a quantity of light of each LED element so as to correct variation in light quantity of each of the plurality of LED elements.
Dependencies are inferred from the claim text.