Patent · US Active

Optical bandpass filter system, in particular for multichannel spectral-selective measurements

US8879152B2 · kind B2 · utility

10Cited by

3References

5Claims

0Family size

Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Stephan Junger · Bubenreuth, DE
Wladimir Tschekalinskij · Nuremberg, DE
Norbert Weber · Pocking, DE

Key dates

Filing date	Jul 11, 2011
Grant date	Nov 4, 2014
Priority date	—
Expiry date	Dec 3, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH10F39/8053
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The present invention relates to an optical bandpass filter system that has at least one combination of a bandpass filter that provides a first nanostructured metallic layer (4) and a bandstop filter comprising a second nanostructured metallic layer (7), which are arranged one behind the other, and the layer thicknesses of which are different. The bandstop filter is tuned to the bandpass filter in such a way that it blocks a contiguous wavelength range that partially overlaps a pass-band width of the bandpass filter. With the suggested optical filter system it is possible to create various filter characteristics side by side in a small space with a small pass-band width.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.