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首页> 外文OA文献 >The Optical Design of a System using a Fresnel Lens that Gathers Light for a Solar Concentrator and that Feeds into Solar Alignment Optics
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The Optical Design of a System using a Fresnel Lens that Gathers Light for a Solar Concentrator and that Feeds into Solar Alignment Optics

机译：使用菲涅尔透镜的系统的光学设计，该透镜会聚光以用于太阳能聚光器并馈入太阳能对准光学器件

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摘要

The Marshall Space Flight Center (MSFC) has been developing a space deployable, lightweight membrane concentrator to focus solar energy into a solar furnace while remaining aligned to the sun. For an inner surface, this furnace has a cylindrical heat exchanger cavity coaligned to the optical axis; the furnace warms gas to propel the spacecraft. The membrane concentrator is a 1727 mm (68.00 in.) diameter, F/1.7 Fresnel lens. This large membrane is made from polyimide and is 0.076 mm (0.0030 in.) thick; it has the Fresnel grooves cast into it. The solar concentrator system has a super fast paraboloid reflector near the lens focus and immediately adjacent to the cylindrical exchanger cavity. The paraboloid collects the wide bandwidth and some of the solar energy scattered by the Fresnel lens. Finally, the paraboloid feeds the light into the cylinder. The Fresnel lens also possesses a narrow annular zone that focuses a reference beam toward four detectors that keep the optical system aligned to the sun; thus, occurs a refracting lens that focuses two places! The result can be summarized as a composite Fresnel lens for solar concentration and alignment.
机译：马歇尔太空飞行中心（MSFC）一直在开发一种可在太空部署的轻质薄膜集中器，以将太阳能聚焦到太阳能炉中，同时保持与太阳对齐。对于内表面，该炉具有与光轴对齐的圆柱形热交换器腔。熔炉加热气体以推动航天器。膜浓缩器的直径为1727毫米（68.00英寸），F / 1.7菲涅耳透镜。这种大的膜是由聚酰亚胺制成的，厚0.076毫米（0.0030英寸）。它具有菲涅耳凹槽。该太阳能聚光器系统在透镜焦点附近且紧邻圆柱形交换器腔体处具有超快速抛物面反射器。抛物面收集了宽带宽和菲涅耳透镜散射的一些太阳能。最后，抛物面将光馈入圆柱体。菲涅尔透镜还具有一个狭窄的环形区域，该环形区域将参考光束聚焦到四个检测器上，以使光学系统与太阳对准。因此，发生了一个聚焦两个地方的折射透镜！结果可以总结为用于太阳聚光和对准的复合菲涅耳透镜。

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