公开(公告)号：US20230193452A1

公开(公告)日：2023-06-22

申请号：US18078207

申请日：2022-12-09

Applicant: CORNING INCORPORATED

Inventor： Nicholas Levi Bredberg ,  Lance Changyong Kim ,  Yongli Xu

IPC: C23C14/06 ,  C23C14/22

CPC classification number: C23C14/0694 ,  C23C14/221

Abstract: Optical elements including YbF3 layers with high transmittance in the LWIR spectral range are described. The YbF3 layer is produced by an ion-assisted deposition process under high voltage conditions. Dense, uniform, and nearly defect-free YbF3 layers are formed. The improved material quality of the YbF3 layers leads to low absorption in the LWIR spectral range, especially at wavelengths above 10.0 microns. The extinction coefficient of the YbF3 layers is less than 0.0400 at a wavelength of 13.5 microns.

公开(公告)号：US20220236455A1

公开(公告)日：2022-07-28

申请号：US17581008

申请日：2022-01-21

Applicant: CORNING INCORPORATED

Inventor： Leonard Gerard Wamboldt ,  Yongli Xu

IPC: G02B1/115

Abstract: An optical element can include a substrate comprising a Group VIA or fluoride-based non-oxide material and an adhesion layer disposed directly on the substrate. An anti-reflective coating stack is disposed directly on the adhesion layer. Methods for forming an optical element are also provided. The density and stress of the adhesion layer and layers of the anti-reflective coating stack are controlled to provide corrosion-resistant coatings on Group VIA or fluoride-based non-oxide substrates. Preferred substrate materials are materials that exhibit high transparency in the infrared.