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Title: Twenty Meter Space Telescope Based on Diffractive Fresnel Lens

Abstract

Diffractive lenses offer two potential advantages for very large aperture space telescopes; very loose surface-figure tolerances and physical implementation as thin, flat optical elements. In order to actually realize these advantages one must be able to build large diffractive lenses with adequate optical precision and also to compactly stow the lens for launch and then fully deploy it in space. We will discuss the recent fabrication and assembly demonstration of a 5m glass diffractive Fresnel lens at LLNL. Optical performance data from smaller full telescopes with diffractive lens and corrective optics show diffraction limited performance with broad bandwidths. A systems design for a 20m space telescope will be presented. The primary optic can be rolled to fit inside of the standard fairings of the Delta IV vehicle. This configuration has a simple deployment and requires no orbital assembly. A twenty meter visible telescope could have a significant impact in conventional astronomy with eight times the resolution of Hubble and over sixty times the light gathering capacity. If the light scattering is made acceptable, this telescope could also be used in the search for terrestrial planets.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
15004856
Report Number(s):
UCRL-JC-154093
Journal ID: ISSN 0277-786X; TRN: US200321%%363
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Journal Volume: 5166; Conference: SPIE 48th Annual Meeting, San Diego, CA (US), 08/03/2003--08/08/2003; Other Information: PBD: 26 Jun 2003
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; APERTURES; ASTRONOMY; CONFIGURATION; DESIGN; DIFFRACTION; FABRICATION; FRESNEL LENS; GLASS; IMPLEMENTATION; LENSES; LIGHT SCATTERING; METERS; OPTICS; TELESCOPES

Citation Formats

Early, J, Hyde, R, and Baron, R. Twenty Meter Space Telescope Based on Diffractive Fresnel Lens. United States: N. p., 2003. Web. doi:10.1117/12.506232.
Early, J, Hyde, R, & Baron, R. Twenty Meter Space Telescope Based on Diffractive Fresnel Lens. United States. https://doi.org/10.1117/12.506232
Early, J, Hyde, R, and Baron, R. Thu . "Twenty Meter Space Telescope Based on Diffractive Fresnel Lens". United States. https://doi.org/10.1117/12.506232. https://www.osti.gov/servlets/purl/15004856.
@article{osti_15004856,
title = {Twenty Meter Space Telescope Based on Diffractive Fresnel Lens},
author = {Early, J and Hyde, R and Baron, R},
abstractNote = {Diffractive lenses offer two potential advantages for very large aperture space telescopes; very loose surface-figure tolerances and physical implementation as thin, flat optical elements. In order to actually realize these advantages one must be able to build large diffractive lenses with adequate optical precision and also to compactly stow the lens for launch and then fully deploy it in space. We will discuss the recent fabrication and assembly demonstration of a 5m glass diffractive Fresnel lens at LLNL. Optical performance data from smaller full telescopes with diffractive lens and corrective optics show diffraction limited performance with broad bandwidths. A systems design for a 20m space telescope will be presented. The primary optic can be rolled to fit inside of the standard fairings of the Delta IV vehicle. This configuration has a simple deployment and requires no orbital assembly. A twenty meter visible telescope could have a significant impact in conventional astronomy with eight times the resolution of Hubble and over sixty times the light gathering capacity. If the light scattering is made acceptable, this telescope could also be used in the search for terrestrial planets.},
doi = {10.1117/12.506232},
url = {https://www.osti.gov/biblio/15004856}, journal = {},
issn = {0277-786X},
number = ,
volume = 5166,
place = {United States},
year = {2003},
month = {6}
}

Conference:
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