front of a laser light source of a laser unit including a first holding part to which at least one optical component is attached the holding device furthermore including a second holding part which is attached to one part of the laser unit and the first holding part being attached to the second holding part furthermore this invention relates to an arrangement with such a holding device and a process for producing this arrangement application_number US 201113047330 A description the device which is shown in fig1 and 2 consists of a solid which is designated the carrier 1 in the form of a cuboid on the top of the carrier 1 there are first surface areas 6 a to 6 e and second surface areas 7 the first surface areas 6 a to 6 e are located spaced apart from one another and each of these first surface areas 6 a to 6 e has a shape which is rectangular in an overhead view these first surface areas 6 a to 6 e of the carrier 1 have a microstructured surface the second surface areas 7 which include the first surface areas are conversely made flat in the areas of the first surface areas 6.