A REFLECTOR

摘要

A reflector comprises a frame (1) over which is stretched a flexible sheet of reflective material (2) to define a curved reflecting surface of pre-determined geometry. The frame (1) defines arcuate sections (3, 4, 5, 6) portions of which support the sheet (2) and lie on the surface of pre-determined geometry. At least one of the arcuate sections (3, 4, 5, 6) is deformable to displace the respective sheet supporting portion and thereby adjust the tension in the flexible sheet (2).