摘要:
There is provided a MEMS microphone as a microelectromechanical transducer comprising a flexible membrane, the flexible membrane comprising an electromagnetic waveguide. There is further provided a microelectromechanical system comprising a substrate which comprises the flexible membrane, and a process for forming the flexible membrane. The flexible membrane may be configured to operate within an optical microphone system.
摘要:
Transducteur électro-optique (T) comprenant: un tronçon de fibre optique (11) comprenant une zone sensible (12) véhiculant un signal optique représentatif d'une élongation de la zone sensible (12), le tronçon de fibre optique (11) étant tendu et s'étendant longitudinalement au repos sensiblement selon un axe longitudinal (x), un actionneur piézoélectrique (A) comprenant au moins un ensemble piézoélectrique comprenant un barreau piézoélectrique (4, 5, 6, 7), le barreau piézoélectrique s'étendant longitudinalement au repos sensiblement parallèlement à l'axe longitudinal (x), ledit barreau piézoélectrique étant pourvu d'un couple d'électrodes entre lesquelles le barreau piézoélectrique est destiné à être alimenté électriquement au moyen d'un signal électrique délivré par un capteur, ledit barreau piézoélectrique étant destiné à se déformer essentiellement par dilatation ou contraction dudit barreau parallèlement à l'axe longitudinal (x) en réponse à une variation du signal électrique et étant couplé mécaniquement au tronçon de fibre optique (11) de façon que cette dilatation ou contraction du barreau piézoélectrique (entraîne une variation d'élongation de la zone sensible (12), le barreau piézoélectrique est en monocristal et destiné à vibrer en mode 31 ou 32.
摘要:
Laser microphone, laser-based microphone, and optical microphone utilizing mirrors having different properties. A laser microphone includes at least two mirrors: a front-side mirror, and a rear-side mirror. The reflectivity of the front-side mirror, is different from the reflectivity of the rear-side mirror; thereby increasing the efficiency or the accuracy of self-mixing of signals in the laser microphone. Additionally or alternatively, the front-side mirror has a first number of Distributed Bragg Reflector (DBR) layers; and the rear-side mirror has a second, different, number of DBR layers; thereby increasing the efficiency or the accuracy of self-mixing of signals in the laser microphone.
摘要:
Lens, lens-holder, lens assembly, and packaging arrangement for a laser microphone or optical microphone. An optical lens is structured as a single, integrated, monolithic structure, having the optical lens therein, and having a top-region and a lower-region; and further having an external threading able to engage with internal threading of a lens-holder. Optionally, the entire monolithic structure of the lens-member, having the optical lens and its external threading, is formed of a single injection-molding plastic component. Optionally, expansion or shrinkage or curvature- modification of the optical lens, due to temperature modifications, causes the monolithic structure of the optical lens, and optionally also the lens-holder, to expand or shrink and to compensate for modification of focal length or other optical properties of the optical lens. Optionally, internal panels or surfaces of the monolithic structure of the optical lens, are conical or slanted inwardly.
摘要:
The present invention relates to a mobile device for detecting light. The mobile device (300) includes a photo detector (320) which is arranged at the end of a socket barrel (114) of an audio jack socket in the mobile device. The socket barrel serves to collimate the light onto the photo detector.
摘要:
Die Erfindung betrifft einen Schwingungsaufnehmer, insbesondere Mikrofon oder Hydrofon, mit einem ersten Resonanzelement und einem ersten optischen Interferometer, welches einen ersten Messweg und einen ersten Referenzweg aufweist, wobei der erste Messweg durch einen ersten Messlichtwellenleiter und der Referenzweg durch einen ersten Referenzlichtwellenleiter gebildet sind, dadurch gekennzeichnet, dass das Resonanzelement den Messlichtwellenleiter aufweist, sodass eine erste mechanische Schwingung des ersten Resonanzelements dazu führt, dass der erste Messlichtwellenleiter der ersten mechanischen Schwingung im Wesentlichen folgt, wobei die erste mechanische Schwingung im Wesentlichen aus einer ersten Schwingungsrichtung dem ersten Resonanzelement aufprägbar ist, und der Referenzlichtwellenleiter mechanisch vom Messlichtwellenleiter entkoppelt ist. Somit kann ein vollkommen neuartiger Schwingungsaufnehmer bereitgestellt werden.
摘要:
A light-based skin contact detector is described, including a boot having an index of refraction less than or equal to another index of refraction associated with skin at a frequency of light, a light emitter and detector coupled to the boot and configured to measure an amount of light energy reflected by an interface of the boot, and a digital signal processor configured to detect a change in the amount of light energy reflected by the interface. Embodiments relate to methods for detecting skin contact by measuring an amount of energy reflected by an interface when a boot is not in contact with skin, measuring another amount of energy reflected by another interface when the boot is in contact with the skin, and detecting a change between the amount of energy and the another amount of energy using a digital signal processor.