LASER IMAGE PROJECTION SYSTEM APPLICABLE TO THE MARKING OF OBJECTS AND METHOD FOR GENERATING HOLOGRAMS

摘要

The system comprises an SLM (3); means for irradiating a laser beam (1, 2) onto said SLM (3); controlling means (4a, 4b) intended to control said SLM (3) in order to define a CGH corresponding to the desired optical image and intended to be irradiated onto an object (5), by means of the modulated reflection of the phase of said irradiated laser light according to said CGH; and focusing means comprising a Fresnel lens holographically defined onto the SLM (3), to improve efficiency in the use of the irradiated laser light energy. The method comprises carrying out an equalization step of the pixels of one image onto which an IFTA is applied in order to generate a CGH for an SLM.