Abstract: A lens carrier and an optical module for forming a light curtain associated with monitoring a protective field. The lens carrier includes at least one lens for focussing a radiation beam forming said light curtain and a lens mask having at least one opening for shaping the radiation beam to have a predetermined aperture. The lens carrier is formed by overmolding said lens mask with a transparent material. The optical module has such a lens carrier and a module body for mounting a radiation transmitter/receiver carrier that comprises at least one transmitter and/or receiver for transmitting and/or receiving said radiation.

Abstract: An optical module for an optical unit associated with forming a light curtain for monitoring a protective or surveillance field. The optical module includes at least one radiation emitting and/or radiation receiving element for transmitting and/or receiving a radiation beam associated with forming a light curtain. The optical module includes a module body for mounting a radiation transmitter/receiver carrier that carries the at least one transmitting and/or receiving element associated with the radiation beam. The module body has at least one alignment element for aligning the optical module within a support element that forms an outer housing of the optical unit.

Abstract: A lens carrier and an optical module for forming a light curtain associated with monitoring a protective field. The lens carrier includes at least one lens for focusing a radiation beam forming said light curtain and a lens mask having at least one opening for shaping the radiation beam to have a predetermined aperture. The lens carrier is formed by overmolding said lens mask with a transparent material. The optical module has such a lens carrier and a module body for mounting a radiation transmitter/receiver carrier that comprises at least one transmitter and/or receiver for transmitting and/or receiving said radiation.

Abstract: An optical module for an optical unit associated with forming a light curtain for monitoring a protective or surveillance field. The optical module includes at least one radiation emitting and/or radiation receiving element for transmitting and/or receiving a radiation beam associated with forming a light curtain. The optical module includes a module body for mounting a radiation transmitter/receiver carrier that carries the at least one transmitting and/or receiving element associated with the radiation beam. The module body has at least one alignment element for aligning the optical module within a support element that forms an outer housing of the optical unit.

Abstract: A lens carrier and an optical module for forming a light curtain associated with monitoring a protective field. The lens carrier includes at least one lens for focussing a radiation beam forming said light curtain and a lens mask having at least one opening for shaping the radiation beam to have a predetermined aperture. The lens carrier is formed by overmolding said lens mask with a transparent material. The optical module has such a lens carrier and a module body for mounting a radiation transmitter/receiver carrier that comprises at least one transmitter and/or receiver for transmitting and/or receiving said radiation.

Abstract: A load-lifting device includes a load carrying beam at whose underside are arranged load-lifting magnets and which has on both sides vertical support columns, wherein securing arms of a load securing device are arranged on the vertical support columns so as to be swingable and in out about a vertical axis. The securing arms engage underneath a suspended load when oriented toward each other in a secured position. The support columns are each arranged on upper support arms which are swingably fastened to a lifting device. The lifting device is supported by the load carrying beam. The securing arms engage in the secured position thereof underneath a suspended load and can be placed against the underside of the load.

Abstract: The composition consists of an aqueous solution of nitric acid and nitrous acid with a pH below 1 and an acid equivalent of from 6 to 10 mmole/ml; the amount of nitrous acid corresponds to 0.01 to 5 mg of nitrite (NO.sub.2.sup.-) per ml. Additionally, the solution preferably contains acetic acid, oxalic acid and lactic acid as well as copper and cadmium ions. For the preferred composition, the preparation takes place by mixing the components and letting them react to the end or by an oxidative method, in the course of which nitrous acid is formed. The composition is suitable for the local treatment of superficial lesions of the skin and mucous membranes in the fields of cosmetics and medicine, particularly for certain malignant tumors. Experimentally, the effectiveness can be checked by two biological tests developed for this purpose.