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. 10, 2022
Filed:
Aug. 02, 2019
Platinum Optics Technology Inc., Taoyuan, TW;
PLATINUM OPTICS TECHNOLOGY INC., Taoyuan, TW;
Abstract
A light shielding sheet for a lens is provided, including: a metal substrate, including: a first surface; a second surface opposing the first surface; a first through light hole being in communication with the first surface and having hole radiuses gradually decreasing in a direction from the first surface to the second surface, a ratio of a depth of the first through light hole to a difference between two of the hole radiuses at two ends of the first through light hole being less than or equal to 0.5; and a second through light hole being in communication with the first through light hole and the second surface; and a light extinction film covering the first surface, the second surface, a hole wall of the first through light hole and a portion of a hole wall of the second through light hole of the metal substrate.