Optics: measuring and testing – Refraction testing – Prism engaging specimen
Patent
1977-02-07
1978-07-11
Clark, Conrad J.
Optics: measuring and testing
Refraction testing
Prism engaging specimen
250574, G03B 2710
Patent
active
040998754
ABSTRACT:
An apparatus and method are provided for determining the extinction coefficient of an atmospheric scattering medium utilizing a single-ended optical system having a predetermined transmitter field of view and two concentrically arranged cooperating optical receivers, wherein backscattered light from near and far receiver fields of view for each of a series of transmitted light pulses is collected by the respective receivers. Optimum reception is achieved for both near and far field scatterers and the received signals are selectively processed by a processor which may include, for example, integration, summation, and differentiation steps that automatically yield extinction coefficient data under a wide range of environmental conditions without requirements of extreme apparatus stability, continuous monitoring, or calibration of the apparatus.
REFERENCES:
patent: 3519354 (1970-07-01), Brown
patent: 3782824 (1974-01-01), Stoliar
McMahon Donald H.
Thaxter James B.
Clark Conrad J.
Sperry Rand Corporation
Terry Howard P.
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