Micro- and nano-hot embossing method for optical glass lens arrays

US11619766B2 · kind B2 · utility

Assignees

• NO.59 INSTITUTE OF CHINA ORDNANCE INDUSTRY · CN
• SHENZHEN UNIVERSITY · CN
• University of Science and Technology Liaoing · CN

Inventors

• Qiang Chen · Sollentuna, SE
• Feng Gong · 安丰镇, CN
• Zhiwen XIE · 东风镇, CN
• Kangsen Li · Longbeilingcun, CN
• Xinfang Huang · 东风镇, CN
• Yuanyuan Wan · Chongqing, CN

Key dates

• Filing date: Sep 24, 2019
• Grant date: Apr 4, 2023
• Expiry date: Nov 27, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03B2215/66
• WIPO field: Micro-structural and nano-technology
• WIPO sector: Chemistry

Abstract

A micro- and nano-hot embossing method for an optical glass lens array, including: preparing a mold with a micro-hole array by micro EDM, where the micro-hole array matches an optical glass lens array and the mold is made of a hard metal material which is conductive and meets strength and temperature requirements; preparing a nano nitride-based graded composite coating on a surface of the mold by magnetron sputtering; and pre-fabricating a glass preform and then placing the glass preform on the surface of the mold; heating the glass preform and hot embossing by a glass molding machine in vacuum; cooling in nitrogen atmosphere; and demolding to produce the optical glass lens array. The micro- and nano-hot embossing method of the present invention improves the surface quality of the optical glass lens array and reduces the cost and difficulty for manufacturing.