How does reflector works?
Reflector consists of countless prisms on its back side. Each prism looks like a box corner, it has three mirror grade faces with certain angle to enable to reflect the entry light. And if you see array of prisms from the top it looks numerous hexagonal pattern.
The prisms on the back side are made of 3 surfaces with certain angles such as box-corners. Light enters the reflector from flat surface of the reflector, then the light reflect throughout those 3 surfaces and most of the light exit the same direction as it came in.
How are the prisms formed?
The prisms on the back side of reflector are duplicated the structure of mold insert when injection molding. The prism pattern will be opposite with the pattern on mold insert. The quality and roughness of mold insert determines the photometric performance of reflector.
Material of reflector
In order to have higher reflection performance, the material needs to be highly transparent, reflector usually molded by Poly(methyl methacrylate) (PMMA) or Polycarbonate (PC).
Style of reflector (Division Line)
Division lines will affect only appearance, not photometric performance. There are three majority style of reflector.