Importance

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Abstract

The apparatus, used for example to stop bleeding by heat coagulation during surgery, comprises a high power incandescent lamp emitting intense radiation high in infrared content enclosed in a housing having a light guide means, such as a solid light pipe, providing a light exit surface. The exit surface of the light guide means is provided with a self supporting stiff and non-pliable polymeric application element having a thickness of at least about 0.1 millimeters or a polymeric coating having the same thickness and physical characteristics, permanently applied to the exit surface or to a transparent end plate positioned adjacent to and protecting said exit surface. The application element or coating, respectively, is made of a polymer such as Teflon, Teflon PFA, Teflon FEP and Teflon PTFE, etc. and is substantially transparent to the radiation emitted by the lamp. The housing is made of a synthetic polymer material loaded with a coloring agent absorbing blue and green light while transmitting infrared radiation, whereby the glare from the lamp is eliminated and the housing is kept from overheating.

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First Claim