The Boeing Company

Mcdonnell Douglas Corporation

Joe B Russek

Robert R Rice

Neil F Ruggieri

Kenneth Leonard Bernier

Robert G Becnel

Karol Grabczewski

Patricia W Stevens

A method and apparatus for monitoring vehicles. The vehicles are monitored using a sensor unit. The sensor unit comprises a housing, a camera system, a wireless communications system, and a controller associated with the housing. The camera system has a field of view and is configured to generate images. The wireless communications system is configured to transmit wireless signals. The controller is configured to detect a number of vehicles in the images, generate information for the number of vehicles, and send the information in the wireless signals. The information for the number of vehicles is sent to a remote location.

Portable and persistent vehicle surveillance system

An immersion cooled semiconductor laser assembly includes an electrically activated semiconductor laser device, such as a two-dimensional laser diode array, and liquid coolant flowing thereabout which directly contacts the emitting facet of the semiconductor laser device. The semiconductor laser assembly also includes first and second electrodes for supplying electrical energy to the semiconductor laser device such that the semiconductor laser device emits a laser output through its emitting facet. During the emission of the laser output, however, the semiconductor laser device generates heat, thereby increasing the temperature of the semiconductor laser device. In order to protect the semiconductor laser device, the circulating liquid coolant draws heat from the semiconductor laser device, thereby cooling the semiconductor laser device. The liquid coolant can be a dielectric liquid coolant which is both electrically and optically passive so a to maintain electrical isolation between the first and second electrodes without absorbing the laser output of the semiconductor laser device. By efficiently cooling the semiconductor laser device, the semiconductor laser device can consistently product output pulses having a relatively high average power and a relatively high pulse repetition rate.

Immersion method and apparatus for cooling a semiconductor laser device

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Fenton, MO, United States of America

Joe B Russek