| 摘要 |
The present invention relates to a beam-shaping element for optical radiation, in particular for UV laser radiation, as well as to a method for producing the beam-shaping element. This beam-shaping element comprises a carrier substrate (1) bearing a thin-layer metallization which is structured for shaping the beam of said optical radiation. The thin-layer metallization is composed of at least two metallic layers (2, 3), which, upon impingement of said optical radiation (4), react with each other accompanied by a permanent change in color as of a certain intensity and/or irradiation period of said optical radiation (4). With this embodiment of the beam-shaping element, use leaves an optically visible trace so that accidental multiple use can be ruled out.
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