Annular lighting system i.e. annular integrator, for use as dark field lighting unit to illuminate sample in microscopic field, has light mixing body with bottom surface on which active surface is provided with light emitting-opening

摘要

The system i.e. annular integrator (1), has multiple light sources i.e. LEDs, for radiating light beams, which are transformed by respective optical components. A cylindrical transparent light mixing body (2) comprises an annular upper surface (3) and an annular bottom surface, where the light sources are inserted into circularly-distributed holes (6) formed on the upper surface. An optical active surface is provided with an annular light emitting-opening at the bottom surface. Inner and outer diaphragm rings are arranged at respective cylinder walls of the body.