9 August 2016 Progress on the fabrication of the DESI corrector optics
Author Affiliations +
The Dark Energy Spectroscopic Instrument (DESI) is under construction to measure the expansion history of the Universe using the Baryon Acoustic Oscillation technique. The spectra of 40 million galaxies over 14000 square degrees will be measured during the life of the experiment. A new prime focus corrector for the Kitt Peak National Observatory Mayall telescope will deliver light to 5000 fiber optic positioners. The fibers in turn feed ten broad-band spectrographs. We will describe the status of the DESI corrector optics, a series of 0.8 to 1.1-meter fused silica and borosilicate lenses currently being fabricated to demanding requirements. We will describe the specs for lenses that are finished or underway, including surface figure, homogeneity, and other parameters; the current schedule for lens production; and a comparison against DESI corrector requirements.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Timothy N. Miller, Peter Doel, David Brooks, Michael J. Sholl, Michael E. Levi, "Progress on the fabrication of the DESI corrector optics", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99088J (9 August 2016); doi: 10.1117/12.2232739; https://doi.org/10.1117/12.2232739


Iranian National Observatory: project overview
Proceedings of SPIE (July 27 2016)
Development of silicon carbide mirrors the example of the...
Proceedings of SPIE (November 21 2017)
Fabrication of the DESI corrector lenses
Proceedings of SPIE (July 10 2018)
Status Report On The W. M. Keck Observatory And Ten...
Proceedings of SPIE (August 20 1986)
Mirror Surface Metrology And Polishing For AXAF/TMA
Proceedings of SPIE (July 14 1986)

Back to Top