ONE-POINT CONCENTRATION TYPE HIGH DENSITY LIGHT SOURCE

摘要

PURPOSE:To obtain a one-point concentration type high density light source which is excellent in endurance at an arbitrary wavelength by irradiating a point shaped heat resistant material light emitting part with directive light concentratedly to emit light by heating. CONSTITUTION:A light source body 10 is provided with a plurality of through holes 12 and a point-shaped light emitting part 3 is irradiated with a laser beam 6 from an irradiation source 5 through the holes 12 to be heated up to about 600 deg.C to 1,300 deg.C. As a result, infrared rays with a wavelength and the maximum value thereof varying according to the temperature thereof are radiated from the light emitting part 3. The intensity of the laser beam 6 is adjusted with a control circuit so that desired radiation infrared rays are obtained from the relationship between the temperature and a radiation rate as specified by the material of the light emitting part 3. This enables the obtaining of the infrared rays with an arbitrary wavelength given as the maximum value depending on the laser 5.