Low Cost Very Large Diamond Turned Metal Mirror, Phase I

Metadata Updated: May 2, 2019

Electrolytic plating of high phosphorus nickel phosphorus alloy will encapsulate a machined mirror substrate master made of fine cell plastic foam such as polystyrene that has been sealed and made electrically conductive with painted-on coatings. After encapsulation with up to one millimeter of NiP metal holes will be drilled and the plastic master will be dissolved with a solvent such as acetone and removed. Prior to encapsulation plating round or other cross section tubes are inserted thru holes in the plastic foam so that they are incorporated into the electroformed mirror structure when the master is encapsulated with more NiP. The tubes which connect the front and back surfaces of the mirror are made by electroforming with the same NiP alloy. The finished mirror substrate will be diamond turned and the very low cutting force diamond turning process will allow fabrication of a very thin mirror face plate without print through since there is only a very low pressure on the mirror from diamond turning. Machining of plastic foam is accomplished very quickly and the foam material is very low cost. In a production mode the expendable foam plastic masters could themselves be molded. The size of the mirrors is only limited by the capacities of the plating bath and the diamond turning machine. The process is applicable to any optical contour and to the manufacture of off-axis segments.

Access & Use Information

Public: This dataset is intended for public access and use. License: U.S. Government Work

Downloads & Resources

Dates

Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_8256
Maintainer
TECHPORT SUPPORT
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Datagov Dedupe Retained 20190501230127
Harvest Object Id 18f11e77-2deb-4ae6-b6c5-cde67cbdf262
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2009-07-01
Homepage URL https://techport.nasa.gov/view/8256
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-07-20
Program Code 026:027
Source Datajson Identifier True
Source Hash 0b0c7f6ef43b4665b8503e526fd629ab3ae0a2ce
Source Schema Version 1.1

Didn't find what you're looking for? Suggest a dataset here.