Abstract: An optical sensor arrangement for measuring an observable including at least one light source for generating a first light component of a first frequency including a first mode and a second light component of a second frequency including a second mode orthogonal to the first mode, an optical resonator having differing optical lengths for the first and second modes, at least one of the optical lengths being variable depending on the observable and a dependence of the respective optical length being different for the first and second modes, and a detector unit coupled to the optical resonator for coupling out the two light components and being configured for detecting a frequency difference between a resonance frequency of the optical resonator for the first mode and a resonance frequency of the optical resonator for the second mode.
Type:
Application
Filed:
June 27, 2012
Publication date:
November 6, 2014
Applicant:
Fraunhofer-Gesellschft zur Foerderung der angewandten Forschung e.V.
Inventors:
Helmut Heidrich, Peter Lützow, Daniel Pergande
Abstract: A package including an electrical circuit may be produced in a more efficient manner when on a substrate including a plurality of electrical circuits the circuits are tested for their functionality and when the functional circuits are connected, by means of a frame enclosing the circuit on the surface of the substrate, to a second substrate whose surface area is smaller than that of the first substrate. The substrates are connected, by means of a second frame, which is adapted to the first frame and is located on the surface of the second substrate, such that the first and second frames lie one on top of the other. Subsequently, the functional packaged circuits may be singulated in a technologically simple manner.
Type:
Grant
Filed:
April 24, 2007
Date of Patent:
November 12, 2013
Assignee:
Fraunhofer-Gesellschft zur Foerderung der Angewandten Forschung e.V.