Communications: directive radio wave systems and devices (e.g. – Combined with diverse type radiant energy system – With laser
Patent
1993-03-01
1994-03-29
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Combined with diverse type radiant energy system
With laser
342205, 342118, 342127, 356 5, G01S 1386
Patent
active
052989054
ABSTRACT:
A lidar apparatus for detecting an object. The lidar apparatus includes a laser providing a visible light output signal over a first field of view and a photodiode having a second field of view. At least some of the first and second fields of view overlap. The photodiode provides electrical signals in response to received optical signals. A controller is coupled to the laser and to the photodiode. The controller for provides electrical signals to the laser, causing emission of visible light output signals. A time varying threshold generator is coupled to the controller. The time varying threshold generator provides a time varying threshold signal in response to signals from the controller. A threshold detector is coupled to the time varying threshold generator and to the photodiode. The threshold detector compares the time varying threshold signal to the electrical signals to provide signals indicating presence or absence of the object.
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Fliegel Frederick M.
Motorola Inc.
Sotomayor John B.
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