Patent ID: 8023184

Claim:
A microscope that works reflectively comprising a device for high-intensity homogeneous illumination, with minimized light reflections, said device comprising: a light source formed by a light emitting diode having an emitter that emits homogeneously in an emission direction; a lens combination with a first focal length of 10 mm to 15 mm disposed in the emission direction, a first rear focal plane and a Fourier plane situated in the first rear focal plane; a rectangular diaphragm aperture disposed in the first rear focal plane; an additional lens with a second focal length and a second rear focal plane; and a circular diaphragm disposed in the second rear focal plane; wherein said first focal length of said lens combination is adjusted in such a way that the emitter of said light source is projected into infinity; wherein said rectangular diaphragm aperture is projected as an illuminated intermediate image onto an intermediate image plane of the microscope in a shape of a rectangle by using said additional lens; wherein light from said light source is sharply projected onto said circular diaphragm; and wherein the following holds true: a) each of the illuminated intermediate image and the rectangular diaphragm aperture have a respective diagonal and with the additional lens a magnification V 2 =b 2 /g 2 can be achieved that is calculated from a quotient of the diagonal of the illuminated intermediate image and the diagonal of the rectangular diaphragm aperture, wherein b 2 is a first distance between the intermediate image plane and the additional lens, and g 2 is a second distance between the rectangular diaphragm aperture and the additional lens, b) the emitter of the light source has a magnification that corresponds to a focal length ratio V=f 2 /f 1 , wherein f 1 is the first focal length and f 2 is the second focal length, and c) a third distance between the circular diaphragm and the illuminated intermediate image is calculated at d=b 2 −f 2 .