Delivery of radiation from a first transparent medium to a second transparent medium having a lower refraction index

US5796892A · kind A · utility

Assignee

• YEDA RESEARCH AND DEVELOPMENT CO. LTD. · IL

Inventors

• Jacob Karni · Rehovot, IL
• Harald Ries · Munich, DE
• Akiba Segal · Rehovot, IL
• Vladimir Krupkin · Rishon LeZion, IL
• Amnon Yogev · Rehovot, IL

Key dates

• Filing date: Oct 18, 1996
• Grant date: Aug 18, 1998
• Expiry date: Oct 18, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S385/901
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A method of delivering guided radiation arriving via a first transparent medium having a first refractive index into a second transparent medium having a second refractive index that is smaller than the first refractive index, comprising: providing a transparent radiation delivery waveguide capable of admitting concentrated radiation and having a longitudinal axis and a third refractive index substantially equal to or greater than the first refractive index and adapted to guide the radiation along the longitudinal axis. The waveguide having a tapered radiation delivery portion of non-circular cross-sectional shape. Mounting the waveguide in optical contact with the first transparent medium so that the radiation delivery portion projects inside the second transparent medium.