Photogrammetric surveys of the mirror support cell of the Keck Optical Telescope

Peter C. Gustafson

doi:10.1117/12.2294296

1 August 1990 Photogrammetric surveys of the mirror support cell of the Keck Optical Telescope

Peter C. Gustafson

Proceedings Volume 1395, Close-Range Photogrammetry Meets Machine Vision; 13951H (1990) https://doi.org/10.1117/12.2294296
Event: Close-Range Photogrammetry Meets Machine Vision, 1990, Zurich, Switzerland

Abstract

The W. M. Keck Observatory will house the largest optical telescope ever constructed. A multi-segmented, 10 m diameter mirror will allow the telescope to look into space over a distance four times further than any other current system. The support cell for the mirror segments was manufactured in Spain, partially dismantled for shipment and then re-assembled and installed on the mountain of Mauna Kea in Hawaii. Photogramme.tric surveys of the structure were made both in Spain and Hawaii. Measurements in Spain served as acceptance criteria for the structure in addition to detailing as-built conditions. Loaded deformation was also tested in Spain to confirm conformance to design. The measurements in Hawaii checked for effects of shipment and also proper installation in a very different physical environment. All surveys yielded similar precision of 0.03mm RMS one sigma (1 part in 300,000 of the object diameter). This paper describes the major phases of the project, details specific design and operational characteristics of the surveys and presents the results obtained.

Citation Download Citation

Peter C. Gustafson "Photogrammetric surveys of the mirror support cell of the Keck Optical Telescope", Proc. SPIE 1395, Close-Range Photogrammetry Meets Machine Vision, 13951H (1 August 1990); https://doi.org/10.1117/12.2294296

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