Integration and testing of the WYFFOS fiber-fed spectrograph for the William Herschel Telescope

Susan P. Worswick; David W. Gellatly; Nicholas K. Ferneyhough; David L. King; Andrew J. Weise; Richard G. Bingham; Anthony Patrick Oates

doi:10.1117/12.211838

14 June 1995 Integration and testing of the WYFFOS fiber-fed spectrograph for the William Herschel Telescope

Susan P. Worswick, David W. Gellatly, Nicholas K. Ferneyhough, David L. King, Andrew J. Weise, Richard G. Bingham, Anthony Patrick Oates

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Proceedings Volume 2476, Fiber Optics in Astronomical Applications; (1995) https://doi.org/10.1117/12.211838
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

The prime focus of the William Herschel telescope (WHT) provides a field of one degree which is to be used for fiber spectroscopy. The WYFFOS spectrograph, based on a Baranne white pupil design, is located on one of the Nasmyth platforms of the telescope and is fed from prime focus by 126, 26 meter long fibers. The system is designed for a wavelength range of 350 nm to 1.1 microns using both transmission and reflection gratings. This paper describes the integration and testing of the spectrograph undertaken in the laboratory. The image quality and spectral resolving power have been measured. The scattered light and amount of cross-talk between adjacent fibers has been assessed. The provision of calibration illumination and facilities for back illumination of the fibers, a requirement needed by the fiber positioner, is discussed.

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Susan P. Worswick, David W. Gellatly, Nicholas K. Ferneyhough, David L. King, Andrew J. Weise, Richard G. Bingham, and Anthony Patrick Oates "Integration and testing of the WYFFOS fiber-fed spectrograph for the William Herschel Telescope", Proc. SPIE 2476, Fiber Optics in Astronomical Applications, (14 June 1995); https://doi.org/10.1117/12.211838

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