Abstract:
Detection arrangement having an array of at least one superconducting single photon detector (SSPD). The detection arrangement further has a cryogenic part (9) with the array of at least one SSPD (1), the cryogenic part (9) being at a superconducting temperature in operation. Also, a separate charge storage element (5) in the form of an electronic component, is provided which is connected to an output terminal (3) of each of the at least one SSPD (1). The separate charge storage elements (5) are positioned on the cryogenic part (9).
Abstract:
A method and apparatus for exposing a solar device to simulated environmental conditions is described. In one embodiment, a chamber is described. The chamber includes a frame defining a partial enclosure having an interior volume, the frame comprising a door selectively sealing an opening in the frame, a plurality of lighting devices coupled to the enclosure interior of an open wall, each of the plurality of lighting devices being positioned to direct light toward an upper surface of a platen disposed in the interior area, and a plurality of fan units positioned in an opening formed in a sidewall of the frame, each of the plurality of fan units positioned to direct ambient air flow from the outside of the enclosure toward the platen and between the plurality of lighting devices to exit through the open wall.
Abstract:
The present invention relates to an integrating sphere for measuring a light-emitting property of a light source, and more particularly, to an integrating sphere having a means for controlling temperature inside the integrating sphere. An integrating sphere for measuring an optical property of a light source according to the present invention has a substantially spherical hollow space formed therein; a first through-hole provided such that a wire for supplying electric power to the light source installed inside the hollow space of the integrating sphere passes therethrough; and a second through-hole provided such that temperature-controlled air is supplied into the hollow space of the integrating sphere therethrough. A light source support, which has one end disposed at the center of the hollow space of the integrating sphere and the other end fixed to an inner peripheral surface so as to hermetically seal the first through-hole of the integrating sphere, is installed within the hollow space. The integrating sphere includes an air supply tube fixed to an outer peripheral surface of the integrating sphere where the second through-hole is formed, so that air can be supplied to the interior of the integrating sphere through the second through-hole; an air supply means for supplying air to the air supply tube; a temperature control means for controlling the temperature of air being supplied from the air supply means and passing through the air supply tube; and a shielding plate installed to be spaced apart by a predetermined distance from the second through- hole.
Abstract:
Sensing in an elevated-temperature environment is provided using a sensor system having a sensor housing with an exterior wall with a window-support region having an outwardly facing external face, and a window through the window-support region of the exterior wall and affixed to the exterior wall. A sensor unit contained within the sensor housing receives an input signal through the window. A thermal-insulation layer is on the external face of the window-support region of the exterior wall at a location immediately adjacent to the window. The sensor system is operated in an environment wherein the window-support region of the exterior wall is heated to a temperature of greater than about 100 °C in the event that no thermal-insulation layer is present. In a typical application, the sensor system is attached to an aircraft such that the external face is in a forward-facing orientation, and the aircraft is operated such that the external face is heated by aerodynamic heating.
Abstract:
A small-sized electronic tube in which a photoelectric surface is efficiently cooled while preventing the formation of dew. A housing (20) has an airtight structure that encloses a case (21) and a socket (23). A photomultiplier tube (10) is fixed and maintained by stem pins (15) in the socket. A Peltier element (30) for cooling the photomultiplier tube and a photoelectric surface (12) is placed in the housing and held by the pressure of the socket (23) and the photomultiplier tube (10) against the case (21). This structure minimizes the thermal contact with the outside of the photomultiplier so as to cool the photoelectric surface efficiently. Moreover, the simplified structure realizes miniaturization of the device and reduces manufacturing costs.
Abstract:
A calibration system is provided including an aperture layer, a lens layer, an optical filter, a pixel layer and a regulator. The aperture layer defines a calibration aperture. The lens layer includes a calibration lens substantially axially aligned with the calibration aperture. The optical filter is adjacent the lens layer opposite the aperture layer. The pixel layer is adjacent the optical filter opposite the lens layer and includes a calibration pixel substantially axially aligned with the calibration lens. The calibration pixel detects light power of an illumination source that outputs a band of wavelengths of light as a function of a parameter. The regulator modifies the parameter of the illumination source based on a light power detected by the calibration pixel.
Abstract:
An apparatus includes a chamber, a first heat exchanger, an adapter, and a second heat exchanger. The first heat exchanger includes a cold finger positioned within the chamber. The second heat exchanger is positioned around an adapter and within the chamber. The second heat exchanger is a counter flow heat exchanger to precool refrigerant entering a Joule-Thomson valve. The adapter is positioned between the cold finger and the second heat exchanger. The adapter transfers heat from a thermal load to both the cold finger and the refrigerant emitted from the Joule-Thomson valve.
Abstract:
L'invention concerne un module optoélectronique 3D d'imagerie destiné à être fixé à un dispositif de formation d'images qui comprend : - un capteur optoélectronique (200) comportant un boîtier (203) avec une puce (201) électriquement connectée à - un empilement d'au moins un circuit imprimé, - l'ensemble capteur et empilement étant moulé dans une résine et présentant des faces selon Z avec des pistes d'interconnexion électrique des circuits imprimés. Il comprend un berceau rigide thermiquement conducteur sous forme d'un cadre (300) présentant une surface de référence selon X,Y et : ∘ sur une surface supérieure (302) : des points de référence (317) destinés à centrer et aligner le dispositif de formation d'images par rapport à la surface de référence, des points de fixation (316) destinés à permettre la fixation du dispositif de formation d'images, et
∘ une surface d'appui intérieure (301) présentant des points d'appui (313) du capteur ajustés pour centrer et aligner la puce par rapport à la surface de référence.
Abstract:
Le dispositif de détection comporte un doigt froid (4) qui réalise la connexion thermique entre un détecteur (2) monté sur une platine de refroidissement (5) et un système de refroidissement (3). Le doigt froid (4) comporte au moins une paroi latérale formée au moins partiellement par une zone en l'alliage métallique amorphe à base d'hafnium. Avantageusement, l'intégralité du doigt froid (4) est en l'alliage métallique amorphe à base d'hafnium.
Abstract:
Illumination devices and methods are provided for calibrating and controlling individual LEDs in the illumination device, for obtaining a desired luminous flux and chromaticity of the device over changes in drive current, temperature, and over time as the LEDs age. In some embodiments, the illumination device may include a phosphor converted LED, configured for emitting illumination for the illumination device, wherein a spectrum of the illumination emitted from the phosphor converted LED comprises a first portion having a first peak emission wavelength and a second portion having a second peak emission wavelength, which differs from the first peak emission wavelength. In such embodiments, methods are provided for calibrating and controlling each portion of the phosphor converted LED spectrum, as if the phosphor converted LED were two separate LEDs. An illumination device is also provided herein comprising one or more emitter modules having improved thermal and electrical characteristics.