Heraeus Med Gmbh

Markus Steckhan

Stefan Greif

Jorg Eduard Hartge

Walter Scheller

Georg Czernin

To heat horizontal surfaces on which patients are placed after surgery, an irradiation apparatus with halogen lamps is provided, the radiation of which is directed toward the horizontal surface to heat it. The surface temperature prevailing in the irradiated area of the horizontal resting surface is detected by a pyrometric sensor as long-wave infrared radiation. This temperature value is used as the controlled variable and is compared with a predetermined nominal value, such as 37.degree. C. In the event of a deviation, a control signal corrects the irradiation intensity by adjusting the power supply to the halogen lamps.

Method for heating a horizontal resting surface for persons and

A field-of-operation illuminating fixture with a video camera in the vicinity of a lamp housing for displaying the field. The video signals emitted by the camera are forwarded along with signals for controlling the camera over the same cable that transmits power to the lamps. The cable extends through the mechanism that the housing is suspended from, such as being extended from a ceiling. The cable is in sections connected by rotating contacts in the form of slip rings at the articulations between a suspension boom and arms. Video signals and camera-control signals are modulated before entering the cable by a module in the ceiling-mounted base of the fixture and are demodulated in another module after leaving the cable. The video signals are processed in a separate accessory. The present invention provides a cost-effective design for a field-of-operation illuminating fixture equipped for video and simple modification of fixtures already equipped therewith.

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Oberursel, Germany

Markus Steckhan