The refractive index (nd) of H-ZLaF70GT is 1.90366, and the dispersion coefficient (υd) is 31.32. Through process optimization, the transmittance of the glass is further improved on the basis of H-ZLaF70. The internal transmittance at 420nm is 97.1%(τ5mm).部透過率曲線 無圖表題.png "H-ZLaF70（70GT）內(nèi)部透過率曲線 無圖表題.png")
