LARGE-ANGLE UNIFORM RADIANCE SOURCE

摘要

A radiance source (20) includes a housing (40) having an interior wall (42), wherein at least a spherical portion of the interior wall (42) of the housing (40) is spherical, an interior volume (46) and an exit port (48). A light source (82) is disposed within the interior volume (46) of the housing (40). A calibration structure (84) blocks and reflects a light ray that would otherwise travel directly from the light source (82) to the exit port (48) without reflecting from the interior wall (42). The calibration structure (84) has a calibration body (86) having a curved back surface (88) facing the light source (82) and a curved front surface (90) facing the exit port (48). There is an optically diffuse, lambertian reflecting surface (96) on at least the spherical portion of the interior wall (42) of the housing (40), the back surface (88) of the calibration body (86), and the front surface (90) of the calibration body (86).