Nidek Co., Ltd.

Masayuki Yoshino

Yoshiaki Mimura

Naoki Ichikawa

Shinya Iwata

Akira Tawada

Yusuke Ando

A fundus imaging apparatus acquires a fundus image based on a signal from a light receiving element that receives fundus reflection light of illumination light with which a fundus of a subject eye is irradiated through an objective lens. The fundus imaging apparatus includes an information acquisition unit that acquires information relating to a refractive power of a subject eye, and a process that executes an artifact suppressing process for suppressing occurrence of an artifact due to reflection of the illumination light at the objective lens. The processor switches an imaging mode based on the refractive power between an invalid mode in which the artifact suppressing process is not executed and a valid mode in which the artifact suppressing process is executed.

Fundus imaging apparatus

An ophthalmic apparatus includes: an imaging optical system including an imaging diaphragm placed between an objective lens and an imaging device to restrict light from a fundus, the light having passed through a position conjugate with an examinee's pupil, to image a fundus image by the imaging device through the objective lens and the imaging diaphragm; a first light projecting optical system to project light having a first wavelength emitted from a first light source and restricted in range for passage through the pupil, as autofluorescence-inducing excitation light to the eye through the objective lens; and a first optical-path combining member to allow the imaging optical system and the first light projecting optical system to share at least part of an optical path. The first optical-path combining member is provided between the objective lens and a conjugate position with the pupil through the objective lens in the imaging optical system.

Ophthalmic apparatus

A fundus photographing apparatus includes: an illumination optical system for illuminating a fundus of a examinee's eye; and a photographing optical system for photographing the fundus illuminated by the illumination optical system. The photographing optical system includes: a first aperture diaphragm for forming an image of the aperture diaphragm in a position between a pupil and a posterior surface of a crystalline lens of the eye; and a second aperture diaphragm for forming an image of the aperture diaphragm not acting as a field diaphragm, in a position between the fundus of the eye and the image of the first aperture diaphragm.

Fundus photographing apparatus

A fundus photographing apparatus for photographing a fundus of an examinee's eye includes: a photographing part including a photographing optical system for photographing the fundus; a mechanism for moving the photographing part; a presenting part for presenting a fixation target to the eye; an alignment detecting optical system including a light receiving element to detect an alignment state of the photographing part; and a setting part for setting an alignment completion position in a back and forth direction of the photographing part relative to the eye based on the detected alignment state. The alignment completion position includes a first alignment completion position information to be set when an optical axis of the photographing part is in a predetermined range relative to a corneal vertex of the eye and a second alignment completion position information to be set when the optical axis is apart from the predetermined range.

A fundus camera favorably performing focusing on a fundus of an examinee's eye without a black dot plate in a target projection optical system comprises an illumination optical system comprising a light source and an objective lens, a photographing optical system comprising a focusing lens movable in the optical axis direction and a diopter correction lens to correct a diopter of severe ametropia, a first moving mechanism comprising a first driving unit moving the focusing lens, a focus detection optical system comprising a projection optical system comprising a light source and a photo-receiving optical system comprising a photodetector, a second moving mechanism comprising a second driving unit moving a part of the detection optical system including at least one of the projection light source and the photodetector in the optical axis direction, a monitor, and a control unit controlling the second unit in conjunction with movement of the focusing lens.

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Gamagori, Japan

Masayuki Yoshino