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. 06, 2023
Filed:
Jan. 23, 2019
Tokai Optical Co., Ltd., Okazaki, JP;
Hirotoshi Takahashi, Okazaki, JP;
TOKAI OPTICAL CO., LTD, Okazaki, JP;
Abstract
The optical product includes an optical multilayer film which is disposed on one surface or both surfaces of a base directly or via an intermediate film. The optical multilayer film is obtained by alternately disposing an SiOlayer and a ZrOlayer, forming nine layers in total, such that a first layer counting from the base is the SiOlayer. The optical thickness of the SiOlayer as the first layer is not greater than 0.120×λ/4 when a design wavelength is λ (500 nm), the optical thickness of the ZrOlayer as a second layer is not less than 0.400×λ/4, the optical thickness of the SiOlayer as a third layer is not less than 0.230×λ/4, and the optical thickness of the SiOlayer as a seventh layer is not less than 0.450×λ/4.