Patent ID: 8395840

Claim:
An apparatus for positioning optical components in an optical device, comprising: a holding device having a plurality of receptacles on which the optical components can be fixed, wherein the holding device is rotatable into a plurality of predetermined rotary positions, in which rotary positions respectively one of the optical components is arranged in a target position, a motor comprising a motor shaft for rotating the holding device, and a transmitting mechanism for transmitting a rotary movement of the motor shaft into a rotary movement of the holding device, wherein the transmitting mechanism comprises a toothed belt that is engaged with a first toothing arranged at the holding device and a second toothing arranged at the motor shaft, the first toothing includes Z1 teeth and the second toothing includes Z2 teeth and the ratio Z1/Z2 is n times the number of the receptacles, provided with uniform angular distances from each other on the holding device, for the optical components, wherein n is a natural integer not equal to 0, the motor is a stepper motor, and the stepper motor is installed such that the motor shaft thereof is in a full step position when one of the optical components is arranged in the target position.