Hahn-schickard-gesellschaft Fur Angewandte Forschung E.v.

Daniel Biesinger

Achim Bittner

Alfons Dehé

The invention relates to a modulatable infrared emitter comprising a MEMS heating element and an actuator, wherein the actuator triggers shape and/or structure changes of the MEMS heating element. Said change in shape and/or structure of the MEMS heating element may vary the ratio of the emitting area to the total area, thereby producing a change in intensity of the emitted infrared beam. The invention further relates to a manufacturing method for the infrared emitter, a method for modulated emission of infrared radiation using the infrared emitter, and preferred uses of the infrared emitter. In further preferred aspects the invention relates to a system comprising the infrared emitter and a control device for regulating the actuator.

Modeling the emission intensity of an IR emitter by varying the emission surface

The invention relates, in a first aspect, to a photoacoustic spectroscope for analyzing gas, comprising an infrared emitter (), which can be modulated, an analysis volume (), which can be filled with gas, and a sound pressure detector. The sound pressure detector comprises a structure () capable of vibrating, an actuator and a measurement unit, wherein the actuator is configured to actively excite vibration of the structure () capable of vibrating and the measurement unit can measure the vibration properties of the structure () capable of vibrating, which measurement depends on the formation of the sound pressure waves. In an additional aspect, the invention relates to a method for analyzing gas, comprising the provision of a photoacoustic spectroscope for analyzing gas, irradiating the gas with infrared radiation, modulated by a modulation frequency, to generate sound pressure waves, exciting the structure () capable of vibrating at an excitation frequency, measuring the vibration properties of the structure () capable of vibrating, which measurement depends on the sound pressure, and determining the sound pressure of the gas based on the measured vibration properties.

Photoacoustic spectroscope having a vibrating structure as sound detector

The invention relates to a modulatable infrared emitter comprising a heating element, a planar base element, a dielectric interlayer, and a planar cover element which is a structured metamaterial, and an actuator, wherein the actuator is configured for a relative movement of the cover element and the base element between a first and a second position in order to modulate the intensity of the emission of the infrared emitter. The invention further relates to production methods for the infrared emitter, methods for the modulated emission of infrared red radiation by means of the infrared emitter, and preferred uses of the infrared emitter. A system comprising the infrared emitter and a control device for regulating the actuator are also preferably the subject matter of the invention.

Metamaterial-based IR emitter having modulatable emissivity

The invention relates to a modulatable infrared emitter comprising an aperture structure, a structured micro-heating element, and an actuator, wherein the aperture structure and the structured micro-heating element are movable relative to each other in parallel planes by means of the actuator to modulate the intensity of emitted infrared radiation. The invention further relates to methods of manufacturing the infrared emitter, a method of modulating emission of infrared radiation using the infrared emitter, and preferred uses of the infrared emitter. In further aspects the invention relates to a system comprising the infrared emitter and a control device for regulating the actuator.

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Villingen-Schwenningen, Germany

Daniel Biesinger