Abstract:
Le composant électronique pour générer un rayonnement infrarouge comprend un premier élément (1) et un deuxième élément (2) agencés de sorte à former une cavité (3) fermée et sous vide dans laquelle au moins un élément résistif (4) dudit composant électronique est suspendu, ledit au moins un élément résistif (4) comprenant du métal. Lesdits premier et deuxième éléments (1, 2) sont liés par soudure eutectique (5) permettant de fermer de façon étanche la cavité (3). Ledit composant électronique comporte des bornes de connexion (6a, 6b) situées à l'extérieur de la cavité fermée (3) et reliées électriquement à l'élément résistif (4) suspendu.
Abstract:
IR emission devices comprising an array of polaritonic IR emitters arranged on a substrate, where the emitters are coupled to a heater configured to provide heat to one or more of the emitters. When the emitters are heated, they produce an infrared emission that can be polarized and whose spectral emission range, emission wavelength, and/or emission linewidth can be tuned by the polaritonic material used to form the elements of the array and/or by the size and/or shape of the emitters. The IR emission can be modulated by the induction of a strain into a ferroelectric, a change in the crystalline phase of a phase change material and/or by quickly applying and dissipating heat applied to the polaritonic nanostructure. The IR emission can be designed to be hidden in the thermal background so that it can be observed only under the appropriate filtering and/or demodulation conditions.
Abstract:
In one example of the disclosure, a system for limitation of energy wavelengths applied during 3D printing includes an energy source to provide energy to a target zone during a 3D printing operation. The system includes a filter chamber through which the energy is to pass before arriving at the target zone. The system includes a filter chamber control component to selectively modify the contents of the filter chamber to limit the wavelengths of energy that can pass through the filter chamber based upon type of the target zone.
Abstract:
Spectral imaging sensors and methods are disclosed. One spectral imaging sensor includes a light source, an array of coded apertures, one or more optical elements, and a photodetector. The light source is configured to emit a plurality of pulses of light toward an object to be imaged. The array of coded apertures is positioned to spatially modulate light received from the object to be imaged. The optical elements are configured to redirect light from the array of coded apertures. The photodetector is positioned to receive light from the one or more optical elements. The photodetector comprise a plurality of light sensing elements. The plurality of light sensing elements are operable to sense the light from the one or more optical elements in a plurality of time periods. The plurality of time periods have a same frequency as the plurality of pulses of light.
Abstract:
안정적인 데이터 추출을 위한 정합 필터 기반의 광대역 신호 수신기를 이용한 광분광학 시스템 및 그 제어 방법이 개시된다. 광분광학 시스템은, 복수의 광원을 이용하여 대상의 특정부위로 빛을 방사하되, 상기 복수의 광원에서 방사되는 빛을 월시 코드(Walsh code)를 이용하여 코드 모듈레이션하여 방사하는 광 전송부; 및 상기 특정부위를 통과하여 나오는 빛을 검출하되, 상기 월시 코드를 이용하여 상기 빛을 디모듈레이션하여 광원을 식별하는 광 수신부를 포함할 수 있다.
Abstract:
The present application describes techniques to image biological tissue to determine biological information of an imaged tissue sample such as changes in hemoglobin concentrations, blood flow rate (pulse), and/or spatio-temporal features. Embodiments include illuminating the tissue sample with light in the near-infrared (NIR) spectrum, which is minimally absorbed but scattered through the tissue sample. By detecting the NIR light that is attenuated through, transmitted through, and/or reflected off the tissue to be imaged, the resulting NIR intensity signals may be further analyzed to provide this data. Embodiments include using multiple NIR light sources having varying wavelengths to obtain changes in the oxy- and deoxy-hemoglobin concentrations of the imaged tissue region. The tissue sample may be imaged over a time period, and the NIR images may be viewed statically or in real time after post-processing analyses have been performed.
Abstract:
Optopair for use in sensors and analyzers of gases such as methane, and a fabrication method therefor is disclosed. It comprises: a) an LED, either cascaded or not, having at least one radiation emitting area, whose spectral maximum is de-tuned from the maximum absorption spectrum line of the gas absorption spectral band; and b) a Photodetector, whose responsivity spectral maximum can be either de-tuned from, or alternatively completely correspond to the maximum absorption spectrum line of the absorption spectral band of the gas. Modeling the LED emission and Photodetector responsivity spectra and minimizing the temperature sensitivity of the optopair based on the technical requirements of the optopair signal registration circuitry, once the spectral characteristics of the LED and Photodetector materials and the temperature dependencies of said spectral characteristics are determined, provides the LED de-tuned emission and Photodetector responsivity target peaks respectively.