Optical layer and optical system

US12222599B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Zhaohui Yang · Beijing, CN
• Przemyslaw P. Markowicz · Woodbury, US
• Mark A. Roehrig · Stillwater, US
• Tri D. Pham · Woodbury, US
• Serena L. Schleusner · Roberts, US
• David A. Rosen · North St. Paul, US
• Yang Liu · Tangxia, CN

Key dates

• Filing date: Dec 1, 2020
• Grant date: Feb 11, 2025
• Expiry date: Jul 24, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/133524
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical system includes a lens layer including a plurality of microlenses arranged along orthogonal first and second directions, and at least one optically opaque mask layer spaced apart from the lens layer and defining a plurality of through openings therein arranged along the first and second directions. There is a one-to-one correspondence between the microlenses and the openings, such that for each microlens, the microlens and corresponding openings are substantially centered on a straight line making a same oblique angle with the lens layer. An optical layer can include the lens layer and the optically opaque mask layer embedded in the optical layer.