Ii-vi Delaware, Inc.

Yiwei Xu

Steven James Frisken

Glenn Wayne Baxter

Nitesh Gulati

Vincent Choo

Described herein are embodiments of a diffractive optical element () such as a grism. In one embodiment, the diffractive optical element () includes an input surface () configured to receive an input optical signal (), a diffractive surface () adapted to spatially disperse the input optical beam () into a dispersed signal and an output surface () configured to output the dispersed signal from the diffractive optical element. The input surface () and the diffractive surface () are non-parallel and the diffractive surface () is formed in situ by a photolithographic technique.

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Rosebery, Australia

Yiwei Xu