Reflector for a surface light source

摘要

A reflecter (11) used in a surface light source comprising a white polyester film in which fine voids are formed and whose apparent specific gravity is in the range of 0.5 to 1.2. The reflectance of the polyester film can be increased by the fine voids. When the reflecter having a high reflectance is used in a surface light source having a side light system, a bright scope easy to see can be obtained.