1results about How to "Reduce Speckle Contrast" patented technology

The application discloses a kind of laser speckle suppression device and method, belong to optical technology field, by laser light source, collimating lens, half-transmission half-reflection mirror, light splitting film layer array, detector is formed, laser light source output coherent laser;Collimating lens is collimated after laser beam, again by half-transmission half-reflection mirror vertical injection light splitting film layer array;Light splitting film layer array will incident beam be divided into multiple non-coherent and light intensity equal sub-beam.The present application is static speckle suppression device, does not need power supply and drive, device structure is compact, small in size, low energy consumption, long service life;This device structure is simple, and the effect of speckle suppression is good, can be divided into N beam light intensity equal non-coherent light for laser beam, at most the speckle contrast of laser is reduced to 1 / N of original 1 / 2 .