摘要:
A monocapillary has a first region of constant inner dimension where the angle of reflection remains essentially constant as radiation is guided therethrough. The monocapillary also has a second region of decreasing inner dimension in a direction toward the outlet where the radiation is guided therethrough. In another embodiment, the monocapillary also has a third region at the inlet of increasing inner dimension toward the outlet direction where the radiation is guided therethrough.