System for eliminating laser speckles and projector using same

The invention relates to a system for eliminating laser speckles and a projector using the same. The system for eliminating the laser speckles comprises a laser light source, a focusing optical unit and an integrator rod unit which is provided with at least one first integrator rod, and the first integrator rod continuously moves up and down; and the laser light source, the focusing optical unit and the integrator rod unit are arranged successively. The projector eliminating the laser speckles comprises a laser light source, a focusing optical unit, an integrator rod unit, a light spot magnifying lens group, an imaging chip and a projection objective group. The invention has the advantages that compared with the conventional method for eliminating the laser speckles, because the adopted first integrator rod has small size, the processing is convenient, the size is reduced and the processing cost is reduced; the speckles on a projection screen are eliminated after a first integrator rod moving technology is adopted; and a laser display projector using the method has the advantages of small size, high energy utilization, low manufacturing cost and easy purchase of components.