Fundus observation apparatus

A fundus observation apparatus, comprising:

• an illumination optical system configured to illuminate a fundus of a subject's eye with line-shaped illumination light;
• a two-dimensional image sensor configured to receive returning light of the illumination light from the fundus on a movable focal plane at a position substantially conjugate optically to the fundus;
• a deflecting member configured to couple an optical path of the illumination light and an optical path of the returning light and to scan the fundus with the illumination light by deflecting the illumination light in synchronization with a movement of the focal plane;
• a first concave mirror having a concave surface-shaped first reflective surface, and configured to reflect the illumination light deflected by the deflecting member;
• a convex mirror having a convex surface-shaped second reflective surface, and configured to reflect the illumination light reflected on the first reflective surface;
• and
• a second concave mirror having a concave surface-shaped third reflective surface, and configured to reflect the illumination light reflected on the second reflective surface on the third reflective surface and to guide the reflected light to the subject's eye, wherein
• the deflecting member has a configuration that allows the returning light to be transmitted through a first region and to reflect the illumination light in a second region different from the first region, and
• the deflecting member is configured to guide the returning light that has been guided via the first concave mirror, the convex mirror, and the second concave mirror to the two-dimensional image sensor.

A fundus observation apparatus, comprising:

• a fundus observation optical system configured to illuminate a fundus of a subject's eye with illumination light, and to receive returning light of the illumination light from the fundus using a two-dimensional image sensor;
• an OCT optical system including an optical scanner and configured to perform OCT scan that irradiates measurement light deflected by the optical scanner onto the subject's eye and detects interference light between returning light of the measurement light and reference light;
• an optical path coupling separating member configured to couple an optical path of the returning light of the illumination light with an optical path of the OCT optical system;
• a first concave mirror having a concave surface-shaped first reflective surface, and configured to reflect the illumination light deflected by the deflecting member;
• and
• a second concave mirror having a concave surface-shaped second reflective surface, and configured to reflect the illumination light reflected on the first reflective surface on the second reflective surface and to guide the reflected light to the subject's eye, wherein
• the fundus observation optical system includes
• a deflecting member having a configuration that allows the returning light to be transmitted through a first region and to reflect the illumination light in a second region different from the first region, and having a scanning mechanism that scans the fundus with the illumination light by deflecting the illumination light, wherein
• the optical path coupling separating member is positioned between the deflecting member and the two-dimensional image sensor, and
• the deflecting member is configured to guide the returning light that has been guided via the first concave mirror and the second concave mirror to the two-dimensional image sensor.

A fundus observation apparatus, comprising:

• a fundus observation optical system configured to illuminate a fundus of a subject's eye with illumination light, and to receive returning light of the illumination light from the fundus using a two-dimensional image sensor;
• an OCT optical system including an optical scanner and configured to perform OCT scan that irradiates measurement light deflected by the optical scanner onto the subject's eye and detects interference light between returning light of the measurement light and reference light;
• an optical path coupling separating member configured to couple an optical path of the returning light of the illumination light with an optical path of the OCT optical system;
• a first concave mirror having a concave surface-shaped first reflective surface, and configured to reflect the illumination light deflected by the deflecting member;
• a convex mirror having a convex surface-shaped second reflective surface, and configured to reflect the illumination light reflected on the first reflective surface;
• and
• a second concave mirror having a concave surface-shaped third reflective surface, and configured to reflect the illumination light reflected on the second reflective surface on the third reflective surface and to guide the reflected light to the subject's eye, wherein
• the fundus observation optical system includes
• a deflecting member having a configuration that allows the returning light to be transmitted through a first region and to reflect the illumination light in a second region different from the first region, and having a scanning mechanism that scans the fundus with the illumination light by deflecting the illumination light, wherein
• the optical path coupling separating member is positioned between the deflecting member and the two-dimensional image sensor, and
• the deflecting member is configured to guide the returning light that has been guided via the first concave mirror, the convex mirror, and the second concave mirror to the two-dimensional image sensor.