Instrument for measuring the from a source of coherent or incoherent radiation, in particular of a laser - radiation source output power and associated method

摘要

The invention relates to an instrument for measuring the power of a source of coherent or incoherent radiation, in particular of a laser - radiation source output radiation, which contains a mass absorption a known heat capacity, which is connected with a holding body. The special feature of the invention consists in that it comprises means for detecting the rate of change of the temperature of the mass absorption, which is made from a laser beam, whose power is to be detected. The measuring time is considerably shorter than the thermal time constant of the mass absorption. The detection means are provided with a central unit for data processing and for the calculation of the power which can be shown on a display connected.