As a common uniform shaping device, microlens array is widely used in laser lighting system. ZEMAX software is used to simulate the light path of microlens array unit size, microlens array thickness, microlens array unit curvature radius, adjacent microlens array spacing distance, integral lens focal length change, and to compare and analyze the illumination spot when the above factors change. The results show that: the smaller the size of microlens array unit, the larger the size of illumination spot; the smaller the curvature radius of microlens array unit, the larger the size of illumination spot; the smaller the distance between microlens arrays, the larger the size of illumination spot; the larger the focal length of integral lens, the larger the size of illumination spot. The conclusion provides a basis for the selection of microlens array in lighting system.
As a kind of main homogenizing device, the homogenizing rod is widely used in laser lighting system. ZEMAX software is used to simulate the light path when the length, tilt degree and aperture size of the homogenizing rod change, and the uniformity of the light spot is calculated by ZPL language in ZEMAX software. The results show that the longer the rod length is, the better the effect is. When the length reaches a certain value, the uniform effect remains unchanged; when the inclination angle is about 0.75 ° and the aperture size exceeds the light source ratio of about 250%, the effect is better Good, the conclusion provides the basis for the selection of the uniform rod in the laser lighting system.
The illumination system used for laser active imaging has higher requirements for the divergence angle of the semiconductor laser. In this paper, ZEMAX is used to simulate the collimation effect of cylindrical lens, aspheric lens, and self-focusing lens, analyze the influence of distance and angle deviation on the collimation effect of cylindrical lens, aspherical lens, and self-focusing lens, and further simulate and use the three lens lighting system which is used for the lighting effect of laser active imaging. The results show that: compared with cylindrical lenses and self-focusing lenses, aspheric lenses are less affected by distance and angle deviation; in the illumination system of laser active imaging, the divergence angle of aspheric lenses is small, and the illumination effect is better. Aspheric lenses are more suitable for the collimating system used in laser active imaging.
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