JP2014188273A5

JP2014188273A5 -

Info

Publication number: JP2014188273A5
Application number: JP2013068085A
Authority: JP
Filing date: 2013-03-28
Publication date: 2016-04-14
Anticipated expiration: 2033-03-28

Description

上記目的を達成するために、本発明における眼科装置は、被検眼の眼底に光束を投光する投光光学系と、
前記眼底からの反射光を撮像素子にて受光する受光光学系と
前記光束の光路に配置されて前記光束を偏向させる偏向部材と、
前記光路の光軸を中心として前記偏向部材を回転させる回転手段と、を有し、
前記偏向部材は、
前記被検眼の眼底共役とは異なる位置に配置されることにより、前記光束が前記眼底において前記光軸を中心として回転されるように構成され、
前記被検眼の瞳孔共役とは異なる位置に配置され、且つ前記光束が前記偏向部材で射出した位置と前記眼底共役の面に照射された位置とを通る直線が前記瞳孔共役の面と前記光軸との交点を通るように前記光軸に対して傾いて配置されることにより、前記光束が前記被検眼の瞳孔の中心を通過して前記眼底に投光されるように構成されることを特徴とする。 To achieve the above object, an ophthalmologic apparatus according to the present invention includes a light projecting optical system that projects a light beam onto the fundus of the eye to be examined,
A polarization direction member disposed on the light path of the light receiving optical system and the light flux Ru deflecting said light beam for receiving the light reflected by the image pickup device from the fundus,
Anda rotating means for rotating the polarization direction member around the optical axis of the optical path,
The deflection member is
By being arranged at a position different from the fundus conjugate of the eye to be examined, the luminous flux is configured to rotate around the optical axis in the fundus.
A straight line that is disposed at a position different from the pupil conjugate of the eye to be examined and that passes through the position where the light beam is emitted by the deflecting member and the position irradiated on the fundus conjugate plane is the pupil conjugate plane and the optical axis. Is arranged so as to be inclined with respect to the optical axis so as to pass through the intersection with the optical axis, so that the luminous flux is projected onto the fundus through the center of the pupil of the eye to be examined. And

Claims

A projection optical system that projects a light beam onto the fundus of the eye to be examined;
A polarization direction member disposed on the light path of the light receiving optical system and the light flux Ru deflecting said light beam for receiving the light reflected by the image pickup device from the fundus,
Anda rotating means for rotating the polarization direction member around the optical axis of the optical path,
The deflection member is
By being arranged at a position different from the fundus conjugate of the eye to be examined, the luminous flux is configured to rotate around the optical axis in the fundus.
A straight line that is disposed at a position different from the pupil conjugate of the eye to be examined and that passes through the position where the light beam is emitted by the deflecting member and the position irradiated on the fundus conjugate plane is the pupil conjugate plane and the optical axis. Is arranged so as to be inclined with respect to the optical axis so as to pass through the intersection with the optical axis, so that the luminous flux is projected onto the fundus through the center of the pupil of the eye to be examined. Ophthalmic device.

The optical axis of the light beam is projected from the light projecting optical system, ophthalmologic apparatus according to claim 1, characterized in that it has a tilt with respect to the visual axis of the eye to be examined.

The light source used in the projection optical system is a coherent light source, LD (Laser Diode) or ophthalmic apparatus according to claim 1 or 2 characterized in that it is a SLD (Super Luminecent Diode).

Said rotation means, it said on the fundus, ophthalmologic apparatus according to any one of claims 1 to 3, characterized in that eccentrically rotating the beam about the optical axis of the light receiving optical system.

It said rotating means, ophthalmologic apparatus according to any one of claims 1 to 4, characterized in that rotates at a period shorter than the uptake time of one frame of the output image of the imaging element.

And further has control means for instructing start and stop of the rotation operation of the rotation means,
Wherein, ophthalmologic apparatus according to any one of claims 1 to 5, characterized in that an instruction to start and stop of the rotation operation according to the operation of the light receiving optical system.

1 through claim, characterized in that pre-Symbol further comprising a calculation means for obtaining the eye refractive power of the eye to be examined in the from successive obtained superimposed multiple frame images of the output image of the imaging element to the rotation of the rotating means The ophthalmologic apparatus according to any one of 6 .

Wherein the distance from the surface of the pupil conjugate to the surface of the fundus conjugate L, wherein the eccentricity of the surface of the fundus conjugated is h, and the tangent of the eccentric amount h and the distance L and tan [alpha (= h / L) If the height d from the optical axis of the light beam emitted from the front Kihen direction member, the distance P from the surface of the pupil conjugate, before Kihen ray angle u after injection of the light beam from the direction member , characterized in that have a relationship of d / P = tan [alpha and u = alpha, ophthalmologic apparatus according to any one of claims 1 to 7.

An optical system that receives reflected light from the fundus of the subject's eye irradiated with measurement light with an image sensor;
A deflecting member that deflects the measurement light disposed in the optical path of the optical system,
The deflection member is
Arranged at a position different from the fundus conjugate of the eye to be examined,
Arranged at a position different from the pupil conjugate of the eye to be examined,
A straight line passing through the position where the measurement light is emitted by the deflecting member and the position irradiated on the fundus conjugate plane passes through the intersection of the pupil conjugate plane and the optical axis of the optical system. An ophthalmologic apparatus characterized by being inclined with respect to the device.

The ophthalmologic apparatus according to claim 9, wherein an optical axis of the measurement light is inclined with respect to a visual axis of the eye to be examined.

The ophthalmic apparatus according to claim 9 or 10, wherein the light source that generates the measurement light is a coherent light source, and is an LD (Laser Diode) or SLD (Super Luminescent Diode).

The distance from the pupil conjugate plane to the fundus conjugate plane is L, the amount of eccentricity in the fundus conjugate plane is h, and the tangent of the distance L and the amount of eccentricity h is tan α (= h / L). In this case, the height d of the measurement light emitted from the deflection member from the optical axis, the distance P from the pupil conjugate plane, and the ray angle u after the measurement light is emitted from the deflection member are: d The ophthalmologic apparatus according to claim 9, wherein a relationship of / P = tan α and u = α is satisfied.

Before Kihen direction member, ophthalmologic apparatus according to any one of claims 1 to 12, characterized in that a prism of a wedge-shaped made of a translucent material.

The ophthalmic apparatus according to any one of claims 1 to 13, characterized by further comprising a calculation means for obtaining the eye refractive power of the subject's eye based on an output of the image sensor.