F-P sensor probe, absolute distance measurement device, and absolute distance measurement method

US12174322B2 · kind B2 · utility

Assignee

• Institute of Optics and Electronics, Chinese Academy of Sciences · CN

Inventors

• Xiangang Luo · Fremont, US
• Tiancheng Gong · Beijing, CN
• Chengwei Zhao · Sichuan, CN
• Yanqin WANG · Sichuan, CN
• Guiyuan Jia · Sichuan, CN
• Yanwu Chu · Sichuan, CN
• Changtao WANG · Sichuan, CN

Key dates

• Filing date: Dec 5, 2022
• Grant date: Dec 24, 2024
• Expiry date: Dec 5, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S17/08
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Provided are an F-P sensor probe, an absolute distance measurement device, and an absolute distance measurement method, which relate to the field of non-contact absolute distance measurement technologies. This structure includes a first N+1-core multimode optical fiber probe (9), an optical fiber sleeve (10), an imaging lens group (11), and a reference lens (12), wherein: the first N+1-core multimode optical fiber probe (9), the imaging lens group (11), and the reference lens (12) are sequentially fixed inside the optical fiber sleeve (10) along a direction of the F-P sensor probe toward a sample (8); and the first N+1-core multimode optical fiber probe (9) includes N first multimode optical fibers (16) and one second multimode optical fiber (17), where N≥2, and the N first multimode optical fibers (16) are arranged around the second multimode optical fiber (17).