Grism

Grism

Ein Gitterprisma ist ein optisches Bauteil, das ein Prisma und ein optisches Gitter kombiniert. Als englisches Kunstwort existiert auch der Begriff "grism" (grating + prism). Gitterprismen finden hauptsächlich in Spektrografen Verwendung.

Das Prisma dient dazu, die Wellenlänge zu selektieren, die als nullte Ordnung auf der optischen Achse des Systems weitergeführt wird. Das Gitter weist eine deutlich höhere Dispersion als das Glas auf, es dient der weiteren Aufspaltung der Wellenlängen um die nullte Ordnung herum.


Siehe auch: Spektralanalyse, Spektralklasse, optische Spektrometer, Monochromator


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