Patent ID: 7253959

Claim:
An apparatus for distributing the flux density of an input light flow, the apparatus comprising: a beam splitter having at least one fully reflective mirror surface, each of the at least one fully reflective mirror surfaces extending over only a cross-sectional part of the input light flow, said beam splitter splitting-up the input light flow into at least two light flows, each of the at least two light flows comprising a different cross-sectional part of the input light flow; a beam divider having a partially reflecting optical surface, said beam divider extending over the entire cross-section of two partial light flows and coaxially superimposing the two partial light flows, each of which comprises a flux density fraction of at least one of the light flows, in order to form a first output light flow in a first direction, and coaxially superimposing two further partial light flows, each of which comprises two further flux density fractions of the same light flows as used for forming the first output light flow, in order to form a further output light flow in a further direction; and a light flow output outputting the first output light flow and the further output light flow.