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: A laser irradiating apparatus comprising a first laser source for outputting a first laser beam, a second laser source for outputting a second laser beam, the laser beams being selectively irradiated through either a first light guide or a second light guide, a signal generating means for generating a first signal indicating use of the first light guide and a second signal indicating use of the second light guide; the first signal being generated when the said first light guide is used and the second signal being generated when the second light guide is used; a first assist gas supply means for supplying a first assist gas to the first light guide when the first signal is input; and a second assist gas supply means for supplying a second assist gas to the second light guide when the second signal is input.

Abstract: A laser apparatus using a DC-DC converter type pulse power source generates a pulse laser output of a high peak value by utilizing the negative resistance characteristic of a laser discharge tube. The peak value, pulse width, period of the pulse output are adjustable. The apparatus is capable of producing a continuously oscillating laser light; capable of operating always with approximately maximum efficiency for any value of the laser output. The power source device for the laser apparatus permits adjustment of the pulse width and period of the pulse laser output without any adverse effect on the efficiency of the laser apparatus.

Abstract: A laser irradiating apparatus comprising:a plurality of laser sources for outputting a plurality of laser beams each having a different wave-length;a guide beam source for outputting a visible guide beam;mixing means for coaxially mixing one or more of the laser beams with said visible guide beam;light guide means for guiding said mixed laser beam and visible guide beam to a desired target;said laser sources, said guide beam source, said light guide means and said mixing means all being fixed on a single support stand having a support plate;one or more of said laser sources and said guide beam source being fixed to the same surface of the support plate so as to assure that all irradiated beams from the sources are directed in the same direction and their optical axis are kept in the same distance from the support plate and in parallel thereto.

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.

Abstract: A laser device particularly suitable for use in surgery includes a housing and a laser beam oscillation device elastically mounted within the housing. The laser beam oscillation device includes an elongated support stand which extends substantially vertically within the housing and through an opening in the top of the housing, and a laser beam resonator such as a CO.sub.2 laser is mounted on the support stand to provide a laser beam having an optical axis. A laser beam transmitting arrangement is connected to the support stand coaxially with the optical axis of the laser beam. As a result of this construction, the laser device occupies significantly less floor area within an operating room, and can easily be moved about while maintaining optical alignment at all times.