Balancing method for color wheel

A color wheel is provided for use in the illumination system of a projector. The color wheel includes a rotor and a motor for rotating the rotor, the rotor includes a ring shaped translucent area formed by color filter segments, the translucent area being adapted to continuously extend into a light path as the rotor is rotated, the rotor in a first plane perpendicular to the axis of rotation further includes first means for balancing, the rotor in a second plane perpendicular to the axis of rotation further includes second means for balancing, wherein the first and the second plane are spaced apart. Due to the dual plane balancing means, the color wheel is better balanced.