略語大辞典 [Opt] 23 RA reflectance anisotropy (半導体結晶などの)反射率異方性(測定).reflectance anisotropy; or RDS(reflectance difference spectroscopy); a technique for in-situ monitoring of substrates and crystal growth and of the anisotropy in the reflectance of light polarized along two orthogonal eigenaxes on 丸善「略語大辞典」JLogosID : 11857331