Visibility measuring apparatus using light conductors

Details Visibility measuring apparatus using light conductors Visibility measuring apparatus using light conductors

1978-11-13

1983-09-13

Rosenberger, R. A.

Optics: measuring and testing

For light transmission or absorption

Of fluent material

250575, 356435, G01N 2100

Patent

active

044038623

ABSTRACT:
In visibility measuring apparatus, a transmitter including at least one transmitter optic for emitting light signals and at least one receiver including at least one receiver optic for receiving the emitted light signals are positioned in a measuring base defined by the distance between the at least one transmitter optic and the at least one receiver optic. A central unit controls the light emitting signals and processes the light signals received from the at least one receiver optic. Signal light conductors interconnect at least some of the transmitter and transmitter optics, the central unit and the transmitter and the receiver optics and the central unit. In a modified embodiment each measuring base may include a separate transmitter optic and a separate receiver optic. Additionally, calibration signals may be transmitted from the central unit to each receiver optic by additional light conductors with separate light conductors for returning a reference signal from each receiver optic to the central unit. Temperature induced variations in the transmission capacity of the signal light conductors can be compensated by using a coil of light conductors in parallel therewith.

REFERENCES:
patent: 2324304 (1943-07-01), Katzman
patent: 3392623 (1968-07-01), Walker et al.
patent: 3838925 (1974-10-01), Marks
patent: 3899688 (1975-08-01), Perieres
patent: 3954342 (1976-05-01), Boeke
patent: 3973852 (1976-08-01), Moore et al.
patent: 4111559 (1978-09-01), Smith et al.

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