Abstract: This invention provides an optically controlled dimmer (optically controlled light adjustment device), more particularly, an optically controlled dimmer having a mechanism capable of detecting light reflected from an object in a short distance and to cause a driving circuit to perform ON-OFF action and to adjust the intensity of light in several stages. The mechanism includes an ultra red ray transmitter to perform the control. A transmitter and a receiver are disposed in parallel in a recess of a casing having a panel. The panel has one hole for transmitting control signal light, and another hole for receiving reflected signal light. The dimmer can be activated by blocking the signal light transmitted from the dimmer by hand, to produce a reflected signal light to be received by the receiver. The received reflected signal light is reformed by a stage control circuit and a switching circuit to perform ON-OFF actions. As a result, the intensity of light is controlled in stages.

Abstract: A probe for thermoablation is provided with an insulating hose at whose distal end a metal electrode is provided whose spatial extent is changeable. The metal electrode is formed by flexible arms which are electrically connected to a terminal for the supply of a radio frequency current.

Abstract: A surgical light has a device for the variation of the light field and a device for the setting of the luminous flux, with additionally a device being provided for the detection of a variation in the light field.

Abstract: An operating theater lamp has at least one lamp body with a discharge lamp, which illuminates a site of an operation via optical means. The illuminance of the operating theater lamp can be changed in the region of the site of the operation by special means.

Abstract: An operating theater lamp has a lamp body with a suspension, at least one functional assembly arranged in the lamp body and a control unit. A wall box is provided as a console and communicates with the control unit via a bidirectional communication connection.