前言 抛物柱面反射镜是一种常用的太阳能聚光器,通常由背部镀银或镀铝的玻璃制成。由于玻璃有一定的厚度,阳光在到达镀有反射层的镜子后表面之前,先要经过由空气到玻璃的折射,在反射后射向集热管之前,又要经过由玻璃到空气的折射。由于玻璃厚度不大,一般作光路分析时对这两次折射往往忽略不计。我们在设计一台开口1200毫米、焦距600毫米的 Introduction Parabolic cylindrical reflectors are commonly used solar concentrators and are usually made of silver-plated or aluminized glass on the back. Since the glass has a certain thickness, the sunlight first passes through the refraction from the air to the glass before it reaches the rear surface of the mirrored mirror, and then refracts from the glass to the air before it is reflected toward the heat-collecting tube. As the glass thickness is not large, usually for the optical analysis of these two refractories are often negligible. We are designing an opening 1200 mm, focal length 600 mm