Optical device for homogenizing laser illumination light spots

Abstract

The invention discloses an optical device for homogenizing laser illumination light spots. The device comprises: an I-type optical homogenizing system provided with a first focusing lens and a diffusion sheet, wherein parallel light beams emitted by the array semiconductor laser are vertically incident to the first focusing lens, and the diffusion sheet is placed in a convergent light path focused by the first focusing lens so as to homogenize light spots and focus the homogenized light spots on the surface of the fluorescent ceramic to form an oval shape; and / or an II-type optical homogenization system provided with a zoom lens, a micro-lens array and a second focusing lens, wherein parallel light beams emitted by the array semiconductor laser are zoomed into small-caliber parallel light beams through the zoom lens, and are homogenized through the micro-lens array, and finally, the second focusing lens focuses the light spot on the surface of the fluorescent ceramic to form a rectangular shape. The optical device has the advantages that homogenization of laser lighting spots is achieved, the performance of the fluorescent ceramic is brought into full play, and the lighting effect of the laser lighting device is improved.

Description

technical field [0001] The invention relates to the technical field of semiconductor lasers, in particular to an optical device for homogenizing laser illumination spots. Background technique [0002] With the continuous advancement of fluorescent ceramic technology and heat dissipation technology, the power of the excitation light source required for laser lighting is getting higher and higher, but limited by the technical limitations of semiconductor lasers, most of the light sources used for high-power laser lighting are composed of multiple semiconductor lasers. array. Since the beam of the semiconductor laser is an elliptical Gaussian beam with different divergence angles in the horizontal and vertical directions, the spot is uneven. Then the beams emitted by multiple semiconductor lasers are focused on the surface of fluorescent ceramics, and the light intensity distribution must be Gaussian distribution or even a spatial lattice composed of multiple Gaussian distribu...

AI Technical Summary

Problems solved by technology

Then the beams emitted by multiple semiconductor lasers are focused on the surface of fluorescent ceramics, and the light intensity distribution must be Gaussian distribution or even a spatial lattice composed of multiple Gaussian distributions. Since the energy of Gaussian distribution is concentrated in the center of the beam, this will lead to fluorescent ceramics. The energy density at a single point or lattice on the surface is extremely high, and the ceramic will be instantly quenched or even broken

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