Laminated optical disk

US8767302B2 · kind B2 · utility

Assignee

• National Taiwan University of Science and Technology · TW

Inventors

• Jong-Woei Whang · Taipei, TW
• Chieh-Jen Hsiao · Hsinchu, TW
• Meng-Che Tsai · Taipei, TW
• Chung-Wei Wang · New Taipei, TW
• Ya Hui Chang · Hengshan, TW

Key dates

• Filing date: Jun 18, 2013
• Grant date: Jul 1, 2014
• Expiry date: Jun 18, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B19/0042
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A laminated optical disk, applied for lighting system or solar energy system, includes a plurality of annular lenses, a base and a circular light guiding unit. The annular lenses are arranged in order from center to outside to form a disk-structure. Each annular lens has a light-input curved surface and a light-output curved surface respectively matching the different thickness of the base. The light-input curved surface is opposite to the center. The light-output curved surface is opposite to the light-input curved surface, and facing to the center. The light is incident on the light-input curved surface, refracted and tended to concentrate by the light-input curved surface. Besides, the light exiting from the annular lens is to be refracted to the direction of the center by the light-output curved surface. The base of the laminated optical disk can significantly improve the light leakage problem by different annular lenses.