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. 26, 2001
Filed:
Apr. 01, 1999
Hoya Corporation, Tokyo, JP;
Abstract
Plastic optical devices in which an antireflection film (,) is coated on the surface of a plastic base material (,). The antireflection film (,) is a multi-layered film which is formed by depositing a first layer (,) on the side of the plastic base material substantially by a high-refractive material and the next layer (,) by a low-refractive material, and by alternately laminating those high-refractive materials and low-refractive materials. The surface of the optical lens base material (,) has curvature and a plurality of the optical lens base materials (,) are disposed horizontally at the positions of concentric circles in a circular plate holder (,) which is placed horizontally and is rotatable. A sputtering film deposition system comprises targets (,) facing to the surfaces of the optical lens base materials (,). Thickness correcting plates function as mask members (,) for regulating the difference of film thickness disposed in the direction connecting the peripheral part and the center part in the holder and between the targets (,) and the holder (,).