Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Patent
1996-02-28
1998-07-28
McElheny, Jr., Donald E.
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Earth science
G06F16300, G06F16900
Patent
active
057873852
ABSTRACT:
A scanning transmissometer is disclosed for use with a large number of reflectors for detecting dense, but very localized patches of fog to permit warnings to be given to drivers in time to avoid accidents. Reflectors utilized to reflect the laser beam from a scanning transmissometer are heated to remove condensation before measurements of transmissivity are taken. In some implementations, heaters for reflectors are initiated upon detection of a prescan illumination of the reflector by a laser beam and a timer is utilized to turn off heating, once condensation has been dispersed.
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McElheny Jr. Donald E.
Sun Microsystems Inc.
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