SECONDARY STANDARD OF LASER RADIATION ENERGY UNIT FOR CALIBRATION AND INSPECTION OF LASER JOULEMETERS Russian patent published in 2017 - IPC G01J1/08 

FIELD: measuring equipment.

SUBSTANCE: standard includes a laser radiation source, a separation plate, a control photoelectric converter, an optical attenuator, an integrating sphere, a calorimetric reference measuring transducer, a control unit and a computer. The optical attenuator is made in the form of a rotating disk wherein neutral filters are installed. The integrating sphere is provided with an input, output and additional apertures. In the additional aperture, a beam splitter is installed, separating the laser radiation into a direct passing flow, along the way of which the calorimetric reference measuring transducer is installed, and into a diffusely-reflected flow. The centres of the inlet and additional apertures are located on the axis of the direct passing flow. In the output aperture an input of a fibre optic collector is mounted, containing light conductors, at the ends of which the neutral filters and photodetectors are installed to operate in different energy ranges.

EFFECT: increased accuracy and expanded energy range, wherein calibration and inspection are provided.

4 cl, 2 dwg, 1 tbl