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16 August 2000 High-resolution optical spectrograph (HROS): a summary of progress
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A design for HROS has now been developed which is able to meet the science requirements as specified by the community. This design calls for a Cassegrain-mounted échelle spectrograph with a resolving power of R=50,000. Efficiency is maximised both by the location at the Cassegrain focus, and by the adoption of prism (as opposed to grating) cross-dispersion. All of the transmitting optical elements will be made of fused silica, to maximise to efficiency in the UV. The design relies on the concept of an 'immersed' échelle, in which the ruled surface of the échelle grating is 'immersed' in a fused silica prism. This paper outlines the working of the HROS instrument and summarises the progress that has been made on the project, on a modular level. The reader is also refered to 3 additional paper in these proceedings. Paper 4008-14 discusses the flexural performance of this instrument, paper 4008-15 discusses the optical design of the instrument and paper 4008-98 describes the Active Flexure Compensation (AFC) that is to be used on the HROS instrument.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Margaret Aderin, Ian A. Crawford, Paolo D'Arrigo, and Andrew Charalambous "High-resolution optical spectrograph (HROS): a summary of progress", Proc. SPIE 4008, Optical and IR Telescope Instrumentation and Detectors, (16 August 2000);


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