Patent ID: 6850363

Claim:
An arrangement for coupling at least one beam of optical tweezers for trapping particles and/or a treatment beam into a microscope beam path in a laser scanning microscope, comprising: means for changing a position of the beam focus of the optical tweezers and/or of the treatment beam in a freely adjustable manner; wherein movable optics, which is separate from a microscope objective, are provided for changing the position of the beam focus of the optical tweezers and/or of the treatment beam and for in-coupling a scanning laser beam from the laser scanning microscope; wherein the change is controllable and causes a movement of the optical tweezers and/or of the treatment beam in the direction opposite to the movement of the microscope objective; the means for changing operable to control a displacement of the movable optics by previously stored or calculated values depending on the focal position of the microscope objective.