A laser radar sensor includes a photoreceptor, a dummy circuit, an amplifier, a selector, and the first and the second detection circuits. The first section comprising the tool access and the thread consists of stainless, austenitic steel and the second section configured as a boring part consists of martensitic steel. Light is coupled into the disk from the lateral edge of the substrate and from a light-refracting means, which is arranged in the region of the disk irradiated by the light of the light-irradiation means. Application of the topical ointment to a body area provides for the moisturizing and the slow delivery of the additional substance to the applied area.