The invention relates to a polarizing beam splitter device, an interferometer module system, a lithographic apparatus, and a device manufacturing method. Controlling the speed of the vehicle is further based on determining a cruise control speed mode for the vehicle for each of the plurality of route sections and determining a speed reference command of the vehicle based on at least one of the cruise control speed mode, the section length, the section grade, and a current speed. The first lens group is moved using the cam grooves, and the second lens group is moved using the actuator, so that a faster zooming speed and a lower zooming noise can be achieved. A robot is configured to support and control the movement of at least a section of the mechanical link to transmit the first laser beam to an object. In another embodiment of the invention, a peer subject can create an incentive plan for a specific set of desired metadata for visual information to motivate other peer subjects to provide visual information that satisfies the specific set of desired metadata. A method of automatic start-up of the hematocrit measurement circuit and a method of determining the minimum volume of blood required to obtain an accurate measurement of the hematocrit also is described.