Abstract: A jet stream generating device that generates a jet stream of liquid includes: a cylindrical liquid chamber; a nozzle configured to open an end part of the liquid chamber and inject liquid F in the liquid chamber to outside; a liquid supply path configured to supply liquid F into the liquid chamber; a laser beam irradiation part configured to irradiate a pulse laser beam into the liquid chamber, and vaporize the liquid F in the liquid chamber; and a laser oscillator configured to control laser beam intensity and laser beam pulse width independently. An inner surface of the liquid chamber has a mirror plane for reflecting and guiding the pulse laser beam emitted from the laser beam irradiation part to the end part of the liquid chamber, and an adjusting part configured to adjust a distance between the nozzle and the laser beam irradiation part is included.

Abstract: A jet stream generating device that generates a jet stream of liquid includes: a cylindrical liquid chamber; a nozzle configured to open an end part of the liquid chamber and inject liquid F in the liquid chamber to outside; a liquid supply path configured to supply liquid F into the liquid chamber; a laser beam irradiation part configured to irradiate a pulse laser beam into the liquid chamber, and vaporize the liquid F in the liquid chamber; and a laser oscillator configured to control laser beam intensity and laser beam pulse width independently. An inner surface of the liquid chamber has a mirror plane for reflecting and guiding the pulse laser beam emitted from the laser beam irradiation part to the end part of the liquid chamber, and an adjusting part configured to adjust a distance between the nozzle and the laser beam irradiation part is included.

Abstract: A device for heating a biotissue employing a strong light, characterized in that, in thermotherapy comprising leading a biotissue to necrosis by heating the biotissue by a strong light from a light source, in order to lead a predetermined biotissue to necrosis in a temperature region before reaching tissue transpiration during the raising of the temperature of said biotissue, temperature measurement is performed by a temperature meter measuring the spatial temperature distribution of the biotissue at real time, and that the light output of the light source, the on-time of intermittent irradiation and the off-time of intermittent irradiation are controlled on the basis of the information at real time to accomplish remedial conditions.

Abstract: Laser devices being capable of calling freely any desired mode out of a variety of irradiation modes stored beforehead and of reproducing the mode quickly. Specifically, such devices in which a variety of working condition parameters, such as laser output, irradiation time and pulse width, etc., are stored as one set beforehand in a memory within the laser device, and an operator can call a particular mode as the case demands so as to operate the device in a desired state instantly. And further, such devices in which the working condition parameters stored in the said memory can freely be eliminated and changed.

Abstract: A laser irradiating apparatus which irradiates a plurality of working laser beams having different wave-lengths to obtain complex effects in medical treatments. The outputs of the laser beams are controlled, and the output ratio of the laser beam is selectively set for various irradiating conditions so that the medical treatments for various living organisms can be carried out under the most desirable irradiating condition.

Abstract: Laser irradiating apparatus equipped with a vertical shaft fixed on a power supply box, a first arm which slides up and down along the shaft and rotates around the shaft and a second arm which is pivoted at the first arm tip portion, and with a laser head installed on the second arm. In this apparatus, an articulated arm light guide is fixed on the upper side of the laser head tip portion. Variation of positions of the first and second arms provides a wide range for operation and much compactness of the apparatus when storing. In addition, the laser head is soundly installed on the second arm upper surface, which is useful to prevent any optical deviation.