The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 2002
Filed:
Feb. 05, 2001
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
An optical element having a water repellant composite layer composed of CaF and TiO . The optical element includes a substrate and a composite layer having a chemical formula (100-X)CaF —(X)TiO formed over the substrate. The X in the chemical formula represents the molar percentage of TiO in the composite layer. Through the addition of TiO2 into a CaF2 layer to form the composite layer, surface roughness, adhesion strength and hardness of the layer in the optical element is improved without compromising water resistant capacity. For a composite layer having a percentage composition of TiO between 2% to 100%, contact angle of water droplets is always greater than 100° comparable with Teflon. The refractive index varies according to the composition, but in general, the refractive index falls between 1.23 (2%TiO ) to 2.3 (pure TiO ) for incoming light with a wavelength of 600 nm. Aside from having a good water repellant capacity, the composite layer can also be used as an anti-reflection layer or a layer with special optical properties in an optoelectronic/optical element.