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电视卫星接收天线用抛物形反射器完成反射聚焦电信号的功能,是大家比较熟悉的,但不是唯一能够完成上述功能的反射器。目前,世界上第一个依据菲涅耳透镜原理用胶木板制成的卫星接收天线反射器已由加拿大科学部罗伯特试制成功。这种反射器不仅成本极低且性能优良,某些方面使得传统的抛物形反射器望尘莫及,下面介绍它的原理及设计制作方法。一、菲涅耳透镜的理论要点 1815年法国物理学家菲涅耳首先发明了以他名字命名的菲涅耳透镜。通常菲涅耳透镜被
TV satellite receiving antenna with a parabolic reflector to complete the function of reflecting the focus of the electrical signal is familiar to everyone, but not the only to complete the above functions of the reflector. Currently, the world’s first satellite receiver antenna reflector made from bakelite panels based on the Fresnel lens principle has been successfully trial-manufactured by the Canadian Department of Science in Robert. The reflector is not only very low cost and excellent performance, some aspects of the traditional parabolic reflector far behind, the following describes its principles and design methods. First, the theoretical points of the Fresnel lens French physicist Fresnel in 1815 first invented the Fresnel lens named after him. Fresnel lenses are usually used