Laser projection system with speckle elimination function
A technology of laser projection and speckle dissipation, applied in optics, optical components, instruments, etc., can solve problems such as impracticality
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[0020] figure 1 It schematically shows the structure diagram (optical part) of the first embodiment of the laser projection system based on multiple lasers and having the speckle elimination function of the present invention. The laser projection system consists of a plurality of lasers 11, a beam combining homogenizer 12, a beam expander 13, a phase diffuser 15, a homogenizer 17, a beam shaper 18, a projection chip 19, a projection lens 10, and a series of lenses 14, 16 compositions. Multiple lasers provide a light source with sufficient brightness for the projection system. The beam combining and homogenizing device combines and compresses the laser beams from different lasers and fully mixes them. The beam is expanded and projected through a lens onto a phase diffuser at an appropriate angle. The phase diffuser adds a random phase to the laser projected on the phase diffuser according to the spatial position, and couples it into the light homogenizer through another lens ...
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