Lessons learned in the optical design of the Next-Generation Space Telescope

Details Lessons learned in the optical design of the Next-Generation Space Telescope Lessons learned in the optical design of the Next-Generation Space Telescope

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3356..114h&link_type=abstract

Proc. SPIE Vol. 3356, p. 114-121, Space Telescopes and Instruments V, Pierre Y. Bely; James B. Breckinridge; Eds.

Physics

Optics

1

Scientific paper

Over the past two years, a team of researchers led by the Goddard Space Flight Center has developed a conceptual design for the NGST. The optical design of the optical telescope assembly (OTA) as well as the integrated science instrument module (ISIM) has presented many challenges. As currently envisioned, the NGST is an 8 m class telescope capable of diffraction-limited imaging at a wavelength of 2 microns operating at L2 at a temperature of around 40 K. The baseline design incorporates features such as a segmented primary mirror, deployable optical components, and active optics including a deformable mirror and fast steering mirror. In this paper, we describe the development of the conceptual design, discuss the trade-offs involving performance versus complexity, packaging, and cost, and then highlight some of the more important lessons that have been learned in the process. The interaction between the OTA and the ISIM is also discussed. It is hoped that this paper can provide insight and/or guidance to those who ar or will be working on the continuing refinement of the optical design of the NGST.

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