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  • Fabrication and Testing of l=2 Optical Vortex phase masks for Coronography
    [作者:Mari, E; Anzolin, G; Tamburini, F; Prasciolu, M; Umbriaco, G; Bianchini, A; Barbieri, C; Romanato, F,期刊:OPTICS EXPRESS, 页码:2339-2344 , 文章类型: Article,,卷期:2010年18-3]
  • In this paper we present the fabrication process and tests of two different types of l = 2 spiral phase plates (SPPs), designed for an Optical Vortex Coronagraph (OVC) in the visible wavelength regime. Each phase mask is...
  • Laser differential confocal radius measurement
    [作者:Zhao, WQ; Sun, RD; Qiu, LR; Sha, DG,期刊:OPTICS EXPRESS, 页码:2345-2360 , 文章类型: Article,,卷期:2010年18-3]
  • A new laser differential confocal radius measurement (DCRM) is proposed for high precision measurement of radius. Based on the property of an axial intensity curve that the absolute zero precisely corresponds to the focu...