Development of diamond machined mirror arrays for integral field spectroscopy

David Lee; Martyn Wells; Colin J. Dickson; Paul Shore; Paul Morantz

doi:10.1117/12.673591

6 July 2006 Development of diamond machined mirror arrays for integral field spectroscopy

David Lee, Martyn Wells, Colin J. Dickson, Paul Shore, Paul Morantz

Proceedings Volume 6273, Optomechanical Technologies for Astronomy; 62731Y (2006) https://doi.org/10.1117/12.673591
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

Recent advances in the design of all reflective integral field units have led engineers to look for new techniques to manufacture monolithic mirror arrays for use in such instruments. One such design is being developed at the UKATC for use on the Mid-Infrared Instrument (MIRI) on the James Webb Space telescope. The MIRI instrument will contain four integral field units with image slicer and re-imaging mirror arrays manufactured at Cranfield University. The mirror arrays have been designed with particular attention to the requirements of precision machining and subsequent metrology. The philosophy of "design for manufacture" has led to the production of mirror arrays with unrivalled levels of accuracy. Initially, this paper will describe the opto-mechanical design of the mirror arrays. The paper will then discuss the diamond turning manufacturing technique specially developed to machine these complex components. The paper will also describe the precision metrology capability developed specifically for the MIRI project that is used to accurately measure mirror locations and surface form errors. Finally, the paper will present the results obtained so far for the mirror arrays being prepared for the IFU verification model and prototype.

Citation Download Citation

David Lee, Martyn Wells, Colin J. Dickson, Paul Shore, and Paul Morantz "Development of diamond machined mirror arrays for integral field spectroscopy", Proc. SPIE 6273, Optomechanical Technologies for Astronomy, 62731Y (6 July 2006); https://doi.org/10.1117/12.673591

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