Optics for an illumination device and illumination device

An optics for an illumination device comprising:

• an array of lenses formed of a plurality of lenses that are arranged in a longitudinal direction, each of the plurality of lenses of the array has a lens body which has,
• a light entry surface and an opposite light exit surface which are planar and extend parallel to each other in the longitudinal direction, the light entry and the light exit surfaces are substantially perpendicular to a central beam path,
• a first wall and an opposite second wall, the first and the second walls are uniformly spaced from each other in a transverse direction which is perpendicular to the longitudinal direction, the light entry surface and the light exit surface are connected to each other by the first and the second walls,
• first and second planar diverging walls arranged opposite each other in the longitudinal direction, each of the first and the second diverging walls having a lower edge connected to the light entry surface and extending towards the light exit surface at an angle relative to the central beam path away from each other in the longitudinal direction;
• the plurality of lenses being arranged such that longitudinally opposite sides of the lenses are connected to longitudinal sides of adjacent lenses and form the array of lenses, the plurality of lenses being connected such that upper edges of the first diverging walls of one lens are connected to upper edges of the second diverging walls of adjacent lenses;
• a plurality of fastening elements comprising one first fastening element and at least one second fastening element, the first fastening element fixes the optics with respect to three axes, the at least one second fastening element fastens the optics relative to the three axes such that the at least one second fastening element is movable in the longitudinal direction to facilitate extension of the optics in the longitudinal direction to both sides;
• the light exit surface of each of the plurality of lenses has a stepped lens structure such that light beams are aligned in a direction of the central beam path, the stepped lens structure of the light exit surface is arranged essentially circularly around the central beam path;
• the light entry surface of each of the plurality of lenses is aligned with a light source and has a recurring surface structure of prominences and deepenings, and the recurring surface structure is designed in a sinusoidal manner and extends over a two-dimensional region of the light entry surface to compensate for positional differences of the light source relative to the recurring structure,
• in the longitudinal direction, the region of the light entry surface is arranged centrally on the light entry surface and extends only partially along the light entry surface;
• and
• the lens body extends over the region of the light entry surface and beyond opposite sides of the region of the light entry surface in the longitudinal direction.