| 摘要 |
FIELD: photometry. ^ SUBSTANCE: proposed meter includes photodetector and revolving disk mounted in front of it; disk is provided with hollow tubes having calibrated orifices in their side walls; tubes are telescopic and radially movable along guide holes made in revolving disk in form of radial slots; tubes are set in motion by means of radial motion mechanism. ^ EFFECT: adaptation of meter to beams of different cross section. ^ 2 cl, 2 dwg |
