| 摘要 |
An adjustable beam splitter (50) includes a pentaprism type reflector unit (70) including a housing (72), a splitter mirror (74) positioned in the housing for transmitting a portion of an input energy beam (42) and for reflecting a portion of the input energy beam (61), and a reflective mirror (76) mounted within the housing (72) for directing the reflected portion of the input energy beam (61) at a fixed angle to the input energy beam regardless of the angle of incidence of the input energy beam to the splitter mirror (74) and regardless of manufacturing tolerances of the splitter mirror (74). Translation of the reflected portion of the input energy beam is reduced and the split ratio adjusted by rotating the pentaprism type unit (70) about a line corresponding to the intersection of a plane containing the splitter mirror (74) and a plane containing the reflective mirror (76).
|
