Back to results
US 8,944,595 B2Granted
Ophthalmologic apparatus
AssigneeCanon Kabushiki Kaisha
InventorToshifumi Masaki
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeCanon Kabushiki Kaisha
InventorToshifumi Masaki
Estimating the term…
An ophthalmologic apparatus includes an integration unit which integrates a light emission amount of a light source illuminating an target eye, an integral capacitance changing unit which changes a value of an integral capacitance of the integration unit according to the light emission amount necessary for imaging the target eye, a comparison unit which compares a reference value with an integration value integrated by the integration unit using the value of the integral capacitance changed by the integral capacitance changing unit, and a light emission control unit which stops the light emission of the light source when the integration value exceeds the reference value as a result of the comparison by the comparison unit.
An ophthalmologic apparatus comprising:
An ophthalmologic method comprising:
A non-transitory computer readable storage medium having program code to perform an ophthalmologic method comprising:
An ophthalmologic apparatus comprising:
An ophthalmologic method comprising:
A non-transitory computer readable storage medium having program code to perform an ophthalmologic method comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
About 5 years 9 months of term left · ends 25 Jul 2032 (estimated)
1. Field of the Invention
The present invention relates to an ophthalmologic apparatus.
2. Description of the Related Art
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the invention and, together with the description, serve to explain the principles of the invention.
FIG. 1 is a diagram illustrating an example of a configuration of a fundus camera.
FIG. 2 is a diagram illustrating an example of an electric circuit of a xenon tube driving circuit and a light amount detection unit.
Various exemplary embodiments, features, and aspects of the invention will be described in detail below with reference to the drawings.
Hereinafter, an ophthalmologic apparatus according to an exemplary embodiment of the invention will be described by referring to FIGS. 1 to 8.
FIG. 1 illustrates an example of a configuration of a fundus camera of the exemplary embodiment. On the optical path from an infrared light emitting diode (LED) 1 of an infrared observation light source to an objective lens 10, a diaphragm 2 having an annular opening, a dichroic mirror 5 that transmits infrared light and reflects visible light, a relay lens 6, a mirror 7, a relay lens 8, and a perforated mirror 9, are in this order arranged.