Nidek Co., Ltd.

Kazunobu Kojima

Hitoshi Abe

Satoshi Imaizumi

Yasuyuki Naito

Kenichi Hayashi

Naoyuki Kondo

Naho Kawai

Kazumi Ouchi

A medical laser apparatus suitable for medical treatment, which is capable of obtaining a plurality of visible laser beams each having a different wavelength, but which has an inexpensive structure. A medical laser apparatus capable of selectively irradiating a plurality of visible laser beams each having a different wavelength onto an affected part, comprises: a fiber laser source unit including an excitation light source, a plurality of fiber lasers for oscillating, by means of excitation light from the excitation light source, a plurality of infrared fundamental beams each having a different wavelength and a first optical switch having an input portion and a plurality of output portions for selectively switching a transmission path of the excitation light from the excitation light source to one of the fiber lasers, the fiber laser source unit being capable of selectively oscillating the fundamental beams; and a plurality of wavelength conversion elements for wavelength-converting the fundamental beams, from the fiber laser source unit, to a plurality of visible second harmonic beams.

Medical laser apparatus

The present invention is intended to provide a corneal surgery apparatus which enables a surgical operator to accurately ablate a cornea in part. The corneal surgery apparatus for ablating part of a cornea by irradiating a laser beam onto the cornea of a patient's eye comprises an irradiation optical system for irradiating the laser beam emitted from a laser light source onto the cornea, an aperture, which is disposed in the irradiation optical system, profiling a cross-sectional region of the beam perpendicular to an optical axis of the irradiation into one or more small regions, and correcting device for correcting an intensity distribution of the laser beam, which is changed when the beam passes through the aperture, to a specified intensity distribution.

Corneal surgery apparatus

A gas laser apparatus includes a chamber in which laser medium gas is sealingly filled; a pair of main discharge electrodes arranged opposite to each other in the chamber; and a fan disposed in the chamber; wherein the chamber has an inner wall of a substantially elliptic shape in a plane perpendicular to a lengthwise direction of the chamber, and a part of the inner wall being between the fan and the main discharge electrodes serves as a guide for guiding the gas made to flow by the fan toward the main discharge electrodes.

Gas laser apparatus

A laser treatment apparatus for performing treatments on a patient's eye by irradiating a laser beam is provided with an observation optical system including eyepieces through which a patient's eye is observed, wherein the brightness of a display part for displaying setting information such as laser irradiation conditions and others is controlled based on the light reception quantity detected by a light quantity detecting device.

Laser treatment apparatus

A laser apparatus for generating laser beams of predetermined wavelengths comprises a solid-state laser medium for generating a light beam having predetermined at least three fundamental wavelengths, at least three wavelength converters which respectively convert the light beam into harmonics corresponding to three primary colors of blue, green, and red, the wavelength-converter being circumferentially arranged, wavelength-converter holder for holding the wavelength converters, light blocking portions disposed between the wave length converters; rotating unit for rotating the wavelength-converter holder, thereby repeatedly positioning each of the wavelength converters and each of the light blocking portions on an optical axis of the solid-state laser medium, and a laser resonant optical system which resonates the light beams generated by the solid-state laser medium and outputs the harmonics converted by the wavelength converters.

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Gamagori, Japan

Kazunobu Kojima