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首页> 外文会议>Nonimaging optics: Efficient design for illumination and solar concentration VIII >Spiral non-imaging optical designs
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Spiral non-imaging optical designs

机译：螺旋非成像光学设计

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摘要

Manufacturing technologies as injection molding or embossing specify their production limits for minimum radii of the vertices or draft angle for demolding, for instance. In some demanding nonimaging applications, these restrictions may limit the system optical efficiency or affect the generation of undesired artifacts on the illumination pattern. A novel manufacturing concept is presented here, in which the optical surfaces are not obtained from the usual revolution symmetry with respect to a central axis (z axis), but they are calculated as free-form surfaces describing a spiral trajectory around z axis. The main advantage of this new concept lies in the manufacturing process: a molded piece can be easily separated from its mold just by applying a combination of rotational movement around axis z and linear movement along axis z, even for negative draft angles. Some of these spiral symmetry examples will be shown here, as well as their simulated results.
机译：例如，注模或压花的制造技术规定了其生产极限，以限制顶点的最小半径或脱模的拔模角。在某些要求苛刻的非成像应用中，这些限制可能会限制系统的光学效率或影响照明图案上不希望出现的伪影的生成。这里提出了一种新颖的制造概念，其中光学表面不是从相对于中心轴（z轴）的通常旋转对称中获得的，而是将它们计算为描述围绕z轴的螺旋轨迹的自由形式的表面。这个新概念的主要优点在于制造过程：只需将绕z轴的旋转运动和沿z轴的线性运动（即使对于负拔模角）进行组合，就可以轻松地将成型件从模具中分离出来。这里将显示一些螺旋对称示例及其模拟结果。

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