JP2013244364A5

JP2013244364A5 -

Info

Publication number: JP2013244364A5
Application number: JP2012122309A
Authority: JP
Filing date: 2012-05-29
Publication date: 2015-07-16
Anticipated expiration: 2032-05-29

Description

（１）患者眼の眼底を撮影する撮影部と、該撮影部を前記患者眼に対して相対移動させる駆動部とを備える眼底撮影装置において、前記撮影部は、前記眼底を照明する照明光学系と、対物レンズを介して前記患者眼の角膜にアライメント指標を投影するための光源を持つアライメント手段と、視度補正レンズを持ち前記眼底のフォーカスを合わせるフォーカス手段と、前記アライメント指標の反射像と前記照明光学系で照明された眼底の反射像とを前記対物レンズを介して撮像する撮像素子を備える撮影光学系と、前記アライメント指標の反射像から患者眼の角膜曲率を得る角膜形状取得部及び前記視度補正レンズによる視度補正に基づき球面度数を得る視度情報取得部の少なくとも一方を持つ眼情報取得部と、該眼情報取得部で得られた角膜曲率及び球面度数の少なくとも一方に基づき前記患者眼に対する前記撮影部の適正作動距離に対する補正値を得る作動距離取得手段と、を有し前記駆動部は、前記作動距離取得手段で取得された補正値に基づき前記患者眼に対して前記撮影部を移動させることを特徴とする。
（２）眼底撮影装置は、患者眼の眼底を撮影する撮影部と、前記患者眼の角膜曲率に関する情報を得る角膜形状取得部及び前記患者眼の球面度数に関する情報を得る視度情報取得部の少なくとも一方と、前記角膜曲率に関する情報及び前記球面度数に関する情報の少なくとも一方を用いて、前記患者眼に対する前記撮影部の適正作動距離値を決定する決定手段と、を備えたことを特徴とする。
(1) In a fundus imaging apparatus including an imaging unit that images the fundus of a patient's eye and a drive unit that moves the imaging unit relative to the patient's eye, the imaging unit illuminates the fundus. An alignment unit having a light source for projecting an alignment index onto the cornea of the patient's eye via an objective lens, a focusing unit having a diopter correction lens and focusing the fundus, and a reflected image of the alignment index An imaging optical system including an imaging element that captures a reflected image of the fundus illuminated by the illumination optical system via the objective lens, a corneal shape acquisition unit that obtains a corneal curvature of a patient's eye from the reflected image of the alignment index, and An eye information acquisition unit having at least one of a diopter information acquisition unit that obtains spherical power based on diopter correction by the diopter correction lens, and an angle obtained by the eye information acquisition unit A working distance acquisition unit that obtains a correction value for an appropriate working distance of the imaging unit with respect to the patient's eye based on at least one of a film curvature and a spherical power, and the drive unit acquires the correction acquired by the working distance acquisition unit The imaging unit is moved with respect to the patient's eye based on the value.
(2) The fundus imaging apparatus includes an imaging unit that images the fundus of the patient's eye, a corneal shape acquisition unit that obtains information on the corneal curvature of the patient's eye, and a diopter information acquisition unit that obtains information on the spherical power of the patient's eye And determining means for determining an appropriate working distance value of the imaging unit relative to the patient's eye using at least one of at least one of information on the corneal curvature and information on the spherical power.

Claims

In a fundus imaging apparatus comprising an imaging unit that images the fundus of a patient's eye and a drive unit that moves the imaging unit relative to the patient's eye,
The photographing unit
An illumination optical system for illuminating the fundus;
An alignment means having a light source for projecting an alignment index onto the cornea of the patient's eye via an objective lens;
A focusing means having a diopter correction lens and focusing the fundus;
An imaging optical system including an imaging element that images the reflected image of the alignment index and the reflected image of the fundus illuminated by the illumination optical system via the objective lens;
An eye information acquisition unit having at least one of a corneal shape acquisition unit for obtaining a corneal curvature of a patient's eye from a reflection image of the alignment index and a diopter information acquisition unit for obtaining a spherical power based on diopter correction by the diopter correction lens;
Working distance obtaining means for obtaining a correction value for an appropriate working distance of the imaging unit with respect to the patient's eye based on at least one of corneal curvature and spherical power obtained by the eye information obtaining unit, A fundus imaging apparatus, wherein the imaging unit is moved relative to the patient's eye based on a correction value acquired by a working distance acquisition unit.

The fundus imaging apparatus according to claim 1,
The alignment means has a plurality of light sources arranged symmetrically with respect to the optical axis,
The fundus imaging apparatus, wherein the corneal shape acquisition unit obtains the corneal curvature based on an imaging magnification of a reflection image of the alignment index obtained from an interval between the plurality of alignment indices imaged by the imaging device. .

An imaging unit for imaging the fundus of the patient's eye;
At least one of a corneal shape acquisition unit for obtaining information on the corneal curvature of the patient's eye and a diopter information acquisition unit for obtaining information on the spherical power of the patient's eye;
Determining means for determining an appropriate working distance value of the imaging unit with respect to the patient's eye using at least one of information on the corneal curvature and information on the spherical power;
A fundus photographing apparatus comprising: