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Towards freeform curved blazed gratings using diamond machining

Bourgenot, C.; Robertson, D.J.; Stelter, D.; Eikenberry, S.

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Authors

D.J. Robertson

D. Stelter

S. Eikenberry



Contributors

Ramón Navarro
Editor

James H. Burge
Editor

Abstract

Concave blazed gratings greatly simplify the architecture of spectrographs by reducing the number of optical components. The production of these gratings using diamond-machining offers practically no limits in the design of the grating substrate shape, with the possibility of making large sag freeform surfaces unlike the alternative and traditional method of holography and ion etching. In this paper, we report on the technological challenges and progress in the making of these curved blazed gratings using an ultra-high precision 5 axes Moore-Nanotech machine. We describe their implementation in an integral field unit prototype called IGIS (Integrated Grating Imaging Spectrograph) where freeform curved gratings are used as pupil mirrors. The goal is to develop the technologies for the production of the next generation of low-cost, compact, high performance integral field unit spectrometers.

Citation

Bourgenot, C., Robertson, D., Stelter, D., & Eikenberry, S. (2016, October). Towards freeform curved blazed gratings using diamond machining. Presented at Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, Edinburgh, Scotland

Presentation Conference Type Conference Paper (published)
Conference Name Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Online Publication Date Oct 12, 2016
Publication Date Oct 12, 2016
Deposit Date Feb 13, 2018
Publicly Available Date Aug 16, 2018
Series Title Proceedings of SPIE
Series Number 9912
Series ISSN 0277-786X,1996-756X
Book Title Advances in optical and mechanical technologies for telescopes and instrumentation II.
ISBN 9781510602038
DOI https://doi.org/10.1117/12.2231182
Public URL https://durham-repository.worktribe.com/output/1145944

Files

Published Conference Proceeding (859 Kb)
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Copyright Statement
Copyright © 2016, Society of Photo-Optical Instrumentation Engineers






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