Patent ID: 7388713

Claim:
An optical scanning microscope with line scanning, comprising: a first scanning arrangement for line scanning of first illumination light over a specimen, an objective pupil plane, a detection unit for detecting specimen light coming from the specimen along a detection light path, a beam splitter arranged in the objective pupil plane and including at least one reflecting first portion and at least one transmitting second portion, wherein the beam splitter has a side facing towards the specimen and a side facing away from the specimen, and wherein one of: (a) the reflecting portion couples in the first illumination light and the transmitting portion passes detection light in the detection direction and (b) the transmitting portion couples in the first illumination light and the reflecting portion couples out the detection light, returning means for detouring of a part of the specimen light to the side of the beam splitter facing away from the specimen for return of the detoured specimen light toward the detection unit, and at least one further scanning arrangement for scanning of at least one further illumination light over the specimen, specimen light from scanning of the specimen by the at least one further illumination light being coupled into the detection light path of the detection unit by the beam splitter.