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Record Details

Record 35 of 12725
An analysis of two classes of grazing incidence mirrors for use with Rowland circle spectrometers
Author and Affiliation:
Green, James(California Univ., Berkeley, CA, United States)
Bowyer, Stuart(California, University, Berkeley, United States)
Abstract: Results are presented of a comparative analysis of Hettrick Bowyer Type II (HBII) and Wolter-Schwarzschild Type II (WSII) optics for use with Rowland circle spectrometers. The HBII can substitute, with few exceptions, for a WSII in any Rowland circle with little change in spectrometer performance or design. However, the HBII telescope offers several clear advantages over the WSII in these configurations. Because the HBII employs a virtual focus, it requires a much shorter instrument length than a WSII. For example, a 3-m Rowland circle spectrometer, fed by an optimized, f/10, 1-m diameter WSII, has a total instrument length of 6 m. If a HBII is used to feed the identical spectrometer, the entire instrument length can be as little as 3 m. In addition, the improved imaging gained with the larger graze angles of the HBII design results in better resolution in slitless operation modes.
Publication Date: Jan 01, 1986
Document ID:
19870049151
(Acquired Nov 28, 1995)
Accession Number: 87A36425
Subject Category: OPTICS
Document Type: Conference Paper
Publication Information: (SEE A87-36376)
Publisher Information: United States
Contract/Grant/Task Num: NAG5-420
Financial Sponsor: NASA; United States
Organization Source: California Univ.; Berkeley, CA, United States
Description: 6p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: GRAZING INCIDENCE; MIRRORS; ROWLAND CIRCLES; SPECTROSCOPIC TELESCOPES; COMPARISON; EXTREME ULTRAVIOLET RADIATION; HIGH RESOLUTION; PERFORMANCE PREDICTION
Imprint And Other Notes: IN: Instrumentation in astronomy VI; Proceedings of the Meeting, Tucson, AZ, Mar. 4-8, 1986. Part 1 (A87-36376 15-35). Bellingham, WA, Society of Photo-Optical Instrumentation Engineers, 1986, p. 401-406.
Availability Source: Other Sources
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