Optical filter element for devices for converting spectral information into location information

US10012541B2 · kind B2 · utility

Assignee

• Technische Universitaet Dresden · DE

Inventors

• Maik Langner · Dresden, DE
• Hartmut Fröb · Reinhardtsgrimma, DE
• Vadim G. Lyssenko · Dresden, DE
• Markas Sudzius · Dresden, DE
• Karl Leo · Dresden, DE

Key dates

• Filing date: Oct 7, 2015
• Grant date: Jul 3, 2018
• Expiry date: Oct 7, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J2003/1234
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An optical filter element for devices for converting spectral information into location information, uses a connected detector for detecting signals. The element has at least two microresonators, each comprising at least two superposed reflective layer structures of a material layer having a high refractive index and a material layer having a low refractive index in an alternating sequence, and at least one superposed resonance layer arranged between the two superposed reflective layer structures. The filter element comprises at least one transparent plane-parallel substrate for optically decoupling the two microresonators; the first microresonator being located on a first of two opposing surfaces of said substrate, and the second microresonator being located on said substrate on a second surface thereof that lies opposite the first surface. The resonance layer of at least one microresonator, and/or the reflective layer structure that surrounds said resonance layer, has a layer thickness which can vary along a horizontal axis of said filter element.