Range finder and lens assembly for display thereof

US11604064B2 · kind B2 · utility

Assignees

• SINTAI OPTICAL (SHENZHEN) CO., LTD. · CN
• ASIA OPTICAL CO., INC. · TW

Inventors

• Fang-Li Ma · Lo Wu, CN
• Yue-Ye Chen · Shangchuan, CN
• Bin Liu · Fishers, US
• Jun-Wei Che · Shanghai, CN
• We-Jie Lou · Lo Wu, CN
• Hua-Tang Liu · Taichung, TW

Key dates

• Filing date: Mar 16, 2020
• Grant date: Mar 14, 2023
• Expiry date: May 12, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/142
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A lens assembly for display includes a display, a lens assembly, and a prism assembly. The display emits a first light beam. The prism assembly includes a first, second prisms, and an optical multilayer film, wherein the first prism includes a first, second, and third surfaces; the second prism includes a fourth, fifth, sixth, seventh, and eighth surfaces; and the optical multilayer film is disposed between the third and fifth surfaces. A second light beam enters the first prism through the first surface and exits by the second surface. The first light beam exits the lens assembly and enters the second prism through the eighth surface, and exits the first prism by the second surface. The lens assembly and the prism assembly satisfy: 0.80%≤E1/E0≤0.95%; wherein E0 is an energy of the first light beam emitted from the display and E1 is an energy of the first light beam passes through the lens assembly.