公开(公告)号：US20180059288A1

公开(公告)日：2018-03-01

申请号：US15556989

申请日：2016-03-03

Applicant: TOKUYAMA CORPORATION

Inventor： Sumito ISHIZU ,  Kentaro FUKUDA ,  Kentaro MATSUO

IPC: G02B1/02 ,  C30B29/12

CPC classification number: G02B1/02 ,  C30B15/00 ,  C30B27/02 ,  C30B29/12 ,  G01N27/4074 ,  G01T1/2935

Abstract: A lanthanum fluoride single crystal wherein an alkaline earth metal is added to the lanthanum fluoride single crystal, and internal transmittance of light at 9.3 μm in wavelength is no less than 85%/mm. The lanthanum fluoride single crystal and an optical component which have high transparency in an infrared region, and can be preferably used for phase plates for lasers, lenses and optical window materials for laser beam machines, gas detectors, flame detectors, infrared cameras, and so on, etc. are provided.