SYSTEM, DEVICE AND METHOD FOR EXTENDING THE LIFE-TIME OF AN OPTICAL SYSTEM

摘要

The invention relates to an optical system arranged to provide an output which, in operation, comprises at least one figure of merit, Q. The system comprises an optical component having multiple working areas, said component being mounted on a support member. The system further comprises an optical beam path arranged to bring light into interaction with at least one working area of the optical component wherein the position of said working area(s) may be selected by relative movement between said path and said component while keeping Q substantially unaffected by said movement.