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:
Jun. 10, 2014
Filed:
Sep. 22, 2011
Tsuyoshi Fukagawa, Okazaki, JP;
Hirotoshi Takahashi, Okazaki, JP;
Kazuyoshi Umemura, Okazaki, JP;
Tokai Optical Co., Ltd., Okazaki-Shi, JP;
Abstract
An optical member includes a substoichiometric titanium oxide film formed by depositing substoichiometric titanium oxides in a vacuum chamber into which an oxygen gas for adjusting a vacuum is introduced. In the optical member, the film forming pressure p (Pa) in the vacuum chamber and the optical film thickness (a refractive index of 2.50, a wavelength of 500 nm) of the substoichiometric titanium oxide film have relations of (1) p≧0.005, (2) optical film thickness ≦0.500λ, and (3) optical film thickness ≧(0.001exp(905.73p)−0.050)λ where exp is an exponential function with e as the base of the natural logarithm.