Apparatus for measuring and correcting calibration characteristi

Details Apparatus for measuring and correcting calibration characteristi Apparatus for measuring and correcting calibration characteristi

1978-07-12

1980-09-16

Corbin, John K.

Optics: measuring and testing

Standard

356336, 356339, G01N 2122

Patent

active

042226660

ABSTRACT:
An apparatus for measuring and correcting the calibration characteristic of a photoelectric aerosol analyzer comprises a light guide disposed within a nozzle of the analyzer and having its one end arranged in the analyzer, said end face being made as a ball to provide for an even distribution of the light flux in the working zone of the analyzer. There are provided a controllable light pulse generator, adapted to measure and correct the calibration characteristic of the analyzer, and a meter to measure the intensity of the light flux in the working zone, said generator and said meter being installed, one at a time, above the other, flat, end face of the light guide. The controllable light pulse generator has a housing accomodating a light chopper with a gauged hole and a light source installed before the light chopper so that the light beam from the light source passes through the gauged hole and impinges on the flat end face of the light guide, a light adjuster electrically coupled to the light source, and an electric motor mechanically coupled to the light chopper. The light flux meter comprises a serial arrangement including a light-sensitive receiver coupled optically to the flat end face of the light guide, a direct voltage source, both installed in the housing of the light flux meter, and a galvanometer.

REFERENCES:
patent: 3506359 (1970-04-01), Burke et al.
patent: 3869208 (1975-03-01), Lorenz

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