Arrangement for determining the density of natural fog in the at

Details Arrangement for determining the density of natural fog in the at Arrangement for determining the density of natural fog in the at

1976-08-09

1978-10-31

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

356103, G01N 2128

Patent

active

041236653

ABSTRACT:
An arrangement for determining the density of natural fog in the atmosphere in which a spark lamp serving also as a flashing beacon projects a beam of light composed of consecutive pulses through the fog laden atmosphere so as to scatter part of the light to thus form consecutive pulses of scattered light in a defined region of the path of the light beam, the intensity of which is proportional to the density of the fog in this region, and in which light pulse receiver means are constructed and arranged relative to said region so as to receive only the scattered light pulses which are measured by the receiver means to thereby indicate the density of fog in the aforementioned region.

REFERENCES:
patent: 2182987 (1939-12-01), Hopkins
patent: 2463119 (1949-03-01), Pyle et al.
patent: 2626361 (1953-01-01), Martine
patent: 2700916 (1955-01-01), Muirhead
patent: 2806401 (1957-09-01), Demuth et al.
patent: 2907889 (1959-10-01), De Lisle Nichols et al.
Horman, Melvin H., The Determination of Atmospheric Transmissivity By Backscatter From a Pulsed Light Separated System, Motorola Report No. RL-3828-2, Oct. 1958, pp. 4, 12, and 14.
Horman, Melvin H., Measurement of Atmospheric Transmission Using Backscatter From a Pulsed Light Separated System, ASTIA Document No. 217,614, Motorola Report No. RLF-3828-3, Jun. 1959, pp. viii, 7, 12, 15, 16, 19, 21, 22, 26, 27, 81 and 82.
Electrical Record, Mar. 1930, p. 25, article entitled, "Chalk One Up for Lindy."

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