Optical illumination device e.g. for microscope or machine work surface, has transformation device converting rectangle in light field into parallelogram at illuminated surface

摘要

The illumination device has an optical system receiving a light beam from a light source and providing a light output field of given shape, followed by a transformation device, e.g. a cylindrical lens, which alters the illumination direction of the light field, such that the corners of the corners of a rectangle (12) in the light field lie at the edges of a parallelogram (14) imaged onto the illuminated surface.