Integration of Full-Spectrum Metrology and Polishing for Rapid Production of Large Aspheres, Phase II

Metadata Updated: November 12, 2020

We propose to design, build, and test a major new instrument capable of both measuring and polishing the surface of aspheric mirrors up to 1.2 meters in diameter, and up to f-0.5 in speed, either concave or convex. In the successful Phase I proposal, we laid out the instrument to the component level, and laid out and analyzed every critical subsystem. We also investigated and experimented with the fluid jet polishing to be used by this instrument, setting the stage for further experiments and ultimate usage in Phase II. The metrology accuracy goals, supported by previous measurements, are 1 nanometer rms for full aperture figure, and 0.1 nm rms for mid-frequency and micro-roughness. The full-aperture and mid-frequency metrology approaches are based on previous successful SBIR projects, while the micro-roughness metrology is an improvement on standard Total Integrated Scatter measurements developed under Phase I. All of the metrology instrumentation is integrated into a single measurement head. At the end of the project, we will polish and measure an f-1.1, 560 mm parabola, and possibly an 890 mm, f-2.5 sphere.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Identifier TECHPORT_4991
Data First Published 2006-12-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Homepage URL
Program Code 026:027
Source Datajson Identifier True
Source Hash d5abfda931920e89258f972688a0e1ac632065c3
Source Schema Version 1.1

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