| 摘要 |
Methods, systems, and apparatus for correcting micro-defects on a Fresnel lens surface are described. In one aspect, a measured amount of fluid coating material is applied to the grooved side of a Fresnel lens body, such that in addition to a thin layer of fluid coating material adhering to the surfaces of lens facets and the draft facets of the Fresnel lens body, some of the liquid coating material pools at the bottom corners of the grooves and forms a curved meniscus thereat. The pooled liquid coating material fills out the micro-defects existing in the bottom corners of the grooves. The surface profile of the liquid coating material traces closely to the designed profile of the Fresnel lens body. When the liquid coating material solidifies, the resulting solid coating serves to reduce the undesirable optical effects of the micro-defects in the bottom corners of the Fresnel lens body.
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