| 摘要 |
A laser beam (106) is applied to optics (108, 110, 112, 114, 116, 120, 122) to focus the laser beam into a focal point (130) substantially on a piece of working material (124). An expected shift in a focal plane due to heating of the optics by the laser beam (106) is determined. At least one feature of the optics is altered based on the expected shift so as to maintain the focal point substantially on the piece of working material (124). |
