Patent ID: 7460316

Claim:
A lens installation comprising a wall-integrable lens arrangement intended to be fastened to a wall and to which a connection housing can be mounted, the lens arrangement having a lens head that is transparent to radiation, an attachment portion and a connecting member, the attachment portion projecting into a wall breakthrough having at least two discrete opposed conical surface portions and the connecting member serving to be connected by a connecting member of the connection housing; characterized in that the attachment portion of the lens arrangement is formed complementary to the breakthrough and has at least two discrete attachment contact surfaces in the form of conical surfaces positioned opposite each other in respect to a longitudinal axis of the attachment portion and complementary to the conical surface portions of the wall breakthrough such that it is inserted and is maintained in a pre-specified fixed horizontal rotational position defined by the position of the attachment conical surfaces of the wall breakthrough and is secure against rotation in the wall breakthrough.