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  • 1
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    MSFC/UAH Full Aperture Cryo-Figure AMSD Modal Characterization (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: A full-aperture, interferometric method for measuring the modal characteristics of the Advanced Mirror System Demonstrators (AMSDs) will be presented. The method involves stroboscopic surface figure measurement using an interferometer capable of simultaneous phase-shift measurements. Results of bread-board experiments will be presented as well as the plan for cryo measurements of the AMSDs.
    Keywords: Optics
    Type: 2nd Annual Technology Days; May 22, 2002 - May 24, 2002; Huntsville, AL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Micro-Meteoroids Effects on NGST Optics (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: Results from initial testing of micro-meteoroid testing and analysis will be shown. The micro-meteoroid environment at L2 encompasses particles whose size range from about 0.5micrometers to a few millimeters and whose velocities can and do exceed 20km/s. The particle flux ranges from about 2600/sq m/yr for 0.5um particles to 1 particle/sq m every 1700 yrs for 1 mm size particles. The major concern is not that the unprotected optics will be physically damaged; although if that did happen it would be a very localized effect. The real concern is that after many years, all of the particles that hit the optical and non-optical surfaces [after the 10 year lifetime of NGST, there may be one particle hit every 5mm] may cause the optics to deform, some of which may be uncorrectable. No previous study was found which looked at optic deformations. Many studies looked at reduced glass strength over time and in fact glass strength did fall greater than 25% in many cases. The reduction is strength can be attributed to the surface fractures caused by particle damage.
    Keywords: Astrophysics
    Type: 2nd Annual Technology Days; May 22, 2002 - May 24, 2002; Huntsville, AL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Managing Risk on a Technology Development Project/Advanced Mirror System Demonstrator (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: The risk management study applied to the Advanced Mirror System Demonstrator (AMSD), a precursor mirror technology development for the Next Generation Space Telescope (NGST) is documented. The AMSD will be developed as a segment of a lightweight primary mirror system that can be produced at a low cost and with a short manufacturing schedule. The technology gained from the program will support the risk mitigation strategy for the NGST, as well as other government agency space mirror programs.
    Keywords: Administration and Management
    Type: Fourth National Symposium on Space System Risk Management; May 21, 2002 - May 24, 2002; McLean, VA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Ball Aerospace AMSD Ambient and Cryogenic Test Plans (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: The planned testing of the Advanced Mirror System Demonstrator program being performed by Ball Aerospace are presented.
    Keywords: Instrumentation and Photography
    Type: 2nd Annual Technology Days; May 22, 2002 - May 24, 2002; Huntsville, AL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Ball Aerospace SBMD Coating Test Results (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: The Sub-scale Beryllium Mirror Demonstrator that was successfully tested to demonstrate cryogenic figuring of a bare mirror has been coated with a protected gold reflective surface and retested at cryogenic temperatures. Results showing less than 9 nm rms surface distortion attributable to the added coating are presented.
    Keywords: Instrumentation and Photography
    Type: 2nd Annual Technology Days; May 22, 2002 - May 24, 2002; Huntsville, AL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Ball Aerospace Actuator Cryogenic Testing (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: The ambient testing characterizing step size and repeatability for the Ball Aerospace Cryogenic Nano-Positioner actuators for the AMSD (Advanced Mirror System Demonstrator) program has been completed and are presented. Current cryogenic testing is underway. Earlier cryogenic test results for a pre-cursor engineering model are presented.
    Keywords: Engineering (General)
    Type: 2nd Annual Technology Days; May 22, 2002 - May 24, 2002; Huntsville, AL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Ball Aerospace AMSD Progress Update (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: The current status of the Advanced Mirror System Demonstrator program being performed by Ball Aerospace is presented. The hexagonal low-areal density Beryllium mirror blank has been fabricated and undergoing polishing at the time of this presentation.
    Keywords: Instrumentation and Photography
    Type: 2nd Annual Technology Days; May 22, 2002 - May 24, 2002; Huntsville, AL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Advanced Mirror System Demonstrator (AMSD) Risk Management (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: This paper will report risk issues associated with designing, manufacturing, and testing the Advanced Mirror System Demonstrator (AMSD). The Advanced Mirror System Demonstrator (AMSD) will be developed as a lightweight primary mirror system that can be produced at a low cost and with a short manufacturing schedule. This technology will add to the knowledge base for selection for the Next Generation Space Telescope (NGST), Space Based Laser (SBL), Research Laboratory mission (AFRL), and other government agency programs.
    Keywords: Administration and Management
    Type: Fourth National Symposium on Space System Risk Management: Key Actions for the 21st Century; May 21, 2002 - May 24, 2002; McLean, VA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Television-and-Laser Range-Measuring System (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Triangulation system measures angle between two lines of sight to point on object, determining distance to object. Amenable to automation. Includes automatically aimed rotatable mirrors and laser beam to define one of lines of sight. Adjusts automatically to bring two lines of sight into convergence at common point on object.
    Keywords: ELECTRONIC SYSTEMS
    Type: MSC-20867 , NASA Tech Briefs (ISSN 0145-319X); 12; 1; P. 56
    Format: text
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    NASA TECHNICAL REPORTS
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