METHOD AND DEVICE FOR CONTROLLING THE CONTRAST RANGE OF AN IMAGE CAPTURING LIGHT FALLING ON AN IMAGE CAPTURING MEDIUM

摘要

For controlling the contrast range of an image capturing light falling on an image capturing medium, a light-permeable element in the image capturing optical path is provided in front of a lens of an image recording device, wherein control light transmitted from light sources distributed about the circumference of the light-permeable element can be coupled, which is composed of a plurality of base colors R, G, B, wherein the brightness thereof can be controlled independently from each other. The light source comprises at least a number of partial light sources that is equal to the number of base colors R, G, B, preferably LEDs emitting light in different colors. A central control unit 61 controls the brightness of the partial light sources and stores nominal values of the brightness of the individual base colors R, G, B, emitted from the partial light sources and/or light flux portions from the light mixture of the control light.