Variable laser line module

A laser line module for projecting a laser line onto a surface of a distant target object, as part of a laser line triangulation device for measuring a distance to said surface, the laser line module comprising:

• a light emitting assembly configured to emit measuring radiation, the light emitting assembly comprising:
• a laser diode and
• a beam shaping assembly,
• wherein the laser diode and the beam shaping assembly are arranged and configured to guide the measuring radiation along an optical axis (OA) of the laser line module, and
• a line adjusting unit successively arranged to be irradiated by the measuring radiation of the light emitting assembly and configured to manipulate the measuring radiation to provide the laser line with a defined laser line length, the line adjusting unit comprising a first micro-lens array having a first beam-manipulation surface having a multitude of first microlenses which define a first periodic height profile and providing a first refractive power,
• wherein the line adjusting unit comprises:
• a second micro-lens array comprising a second beam-manipulation surface having a multitude of second microlenses which define a second periodic height profile and providing a second refractive power, and
• an actuator coupled to the second micro-lens array and providing movability of the second micro-lens array relative to the first micro-lens array.