Deterministic Polishing of Replicating Grazing-Incidence Mandrels

Davis, Jacqueline ; Champey, Patrick ; Kolodziejczak, Jeff ; Griffith, Charles

关键词: ANGULAR RESOLUTION;    COLLECTION;    ELECTROFORMING;    ELECTROLESS DEPOSITION;    ERROR ANALYSIS;    GRAZING INCIDENCE;    HIGH RESOLUTION;    MANDRELS;    METAL SURFACES;    METROLOGY;    MIRRORS;    NUMERICAL CONTROL;    POLISHING;    SOUNDING ROCKETS;    X RAY ASTRONOMY;    X RAY OPTICS;   

RP-ID  :  MSFC-E-DAA-TN73695

学科分类：天体物理学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

In an effort to manufacture high-angular-resolution, grazing-incidence, x-ray optics, Marshall Space Flight Center (MSFC) is taking measures to improve its electroformed replicated optics. A key development is the use of computer-numerical control (CNC) polishing to deterministically improve the surface of electroless nickel mandrels used to replicate grazing- incidence optics. Metrology, control software and polishing parameters must function together seamlessly to reach the specifications required to replicate sub-arcsecond optics. Each change in polishing parameters effects the wear pattern of the polishing head. Using Richardson-Lucy deconvolution, the controller software fits the wear pattern to metrology data to calculate the changing feedrates across the mandrel. Here we present an overview of our process, and early results showing the effectiveness of deterministic polishing for replicated optics.