Abstract:
The invention relates to a photon-detection method, including a step consisting of subjecting a photodiode (PD), made of a semiconductor material, to a polarization voltage (BV) such that an avalanche breakdown can occur, when a photon penetrates into the photodiode, in an avalanche-breakdown layer (AZ) extending in the semiconductor material up to a minimum and maximum depth (Pm, PM) so as to be reachable by photons (PH, PH1) having a wavelength between a minimum and maximum wavelength (lambdam, lambdaMu), and steps of comparing the amplitude of a signal (DS), output by the photodiode, with two threshold values (V1, V2), and, if the amplitude of the signal is between the two threshold values, deducing that the photodiode has received a photon having a wavelength between two threshold wavelengths (lambdaS1, lambdaS2) that are between the minimum and maximum wavelengths.
Abstract:
L'invention concerne un procédé de détection de photons, comprenant une étape de soumission d'une photodiode (PD) formée dans un matériau semi-conducteur, à une tension de polarisation (BV) telle qu'un phénomène d'avalanche puisse apparaître lorsqu'un photon pénètre dans la photodiode dans une couche d'avalanche (AZ) s'étendant dans le matériau semi-conducteur jusqu'à des profondeurs minimum et maximum (Pm, PM) de manière à pouvoir être atteinte par des photons (PH, PH1 ) ayant une longueur d'onde comprise entre des longueurs d'onde minimum et maximum (λm, λΜ), et des étapes de comparaison de l'amplitude d'un signal (DS) fourni par la photodiode à deux valeurs de seuil (V1, V2), et de déduction que la photodiode a reçu un photon ayant une longueur d'onde comprise entre deux longueurs d'onde de seuil (λS1, λS2) comprises entre les longueurs d'onde minimum et maximum, si l'amplitude du signal est comprise entre les deux valeurs de seuil.
Abstract:
A flash apparatus comprising at least two flash tubes and at least two energy storage units is presented, wherein each of said at least two energy storage units is being arranged to be configured to strictly correspond to one of the at least two flash tubes for a flash. The flash apparatus is configured to control the amount of energy provided by the at least two energy storage unit(s) to their corresponding flash tube and control the flash duration of the corresponding flash tube dependent of each other, respectively for each flash tube, so as to obtain substantially the same colour temperature from each flash tube for a flash. A method and a computer program product for use in the flash apparatus are also presented.
Abstract:
본 발명은 검사대상광원에 대한 제조상태를 신속하고 정확하게 검사할 수 있는 광원특성 검사 시스템 및 검사방법에 관한 것이다다. 이를 위해 본 발명은 검사 대상이 되는 복수개의 검사대상광원과 각각 일대일 대응되도록 구비되며, 구획된 영역에서 상기 검사대상광원에서 발광되는 빛을 측정하는 복수개의 컬러센서, 상기 컬러센서에서 측정된 데이터를 바탕으로 상기 검사대상광원에 대한 특성값을 산출하는 제어부, 그리고 상기 복수개의 검사대상광원이 기판상에 일정간격으로 배열된 검사대상광원 모듈을 반입하여 상기 검사대상광원들이 상기 컬러센서와 일대일 대응되는 위치에 배치되어 고정되도록 하는 설치유닛을 포함하는 광원특성 검사 시스템 및 검사방법을 제공한다.
Abstract:
The present invention is related to a method for measuring at least one of light intensity and colour in at least one modulated image, the method comprising the steps of: a) detecting a modulation pattern of the modulated image(s); and b) synchronizing a measurement of the intensity and/or colour with the detected modulation pattern. The present invention is also related to a corresponding device.
Abstract:
The present invention relates to a solid-state based light source, a corresponding circuitry and a method of emitting light, including one or more light source elements for generating light, a first sensor for receiving light emitted by the light source elements and ambient light and for generating a first sensor signal (S1) representing the received light, a second sensor for only receiving ambient light and for generating a second sensor signal (S2) representing the received ambient light. Moreover, the solid-state based light source comprises a control unit for receiving the first and the second sensor signals (S1, S2) and for generating control signals (Sc) for controlling the light source elements, based on the difference between the first and the second sensor signals (S1, S2), to compensate for the influence of the ambient light.
Abstract:
The illumination system has a plurality of light emitters (R, G, B) and a lightcollimator (1) for collimating light emitted by the light emitters. Light propagation in the light-collimator is based on total internal reflection (TIR) towards a light-exit window (4) of the light-collimator. At least one light sensor (8) for optical feedback is placed outside the light-collimator and is arranged to receive light emitted by the light emitters exclusively through reflection at the light-exit window of the light-collimator. Preferably, the light sensor is placed substantially coplanar with the light emitters. Preferably, a side wall (35) of the light-collimator is provided with a protruding portion (9) for guiding the light reflected at the light-exit window of the light-collimator towards the light sensor. Preferably, the illumination system is provided with a reflector (12). Preferably, the illumination system comprises a holographic diffuser (17). Accurate sensing of the color mixing of light emitted by the illumination system is obtained.
Abstract:
In one example in accordance with the present disclosure a print media lighting system is described. The system includes a multi-colored array of lighting elements to illuminate a print media as the print media passes through an illumination zone of a printing device. The multi-colored array of lighting elements are alterable based on a target lighting profile. The system also includes a control device electrically coupled to the multi-colored array of lighting elements. The control device alters emission characteristics of the lighting elements to adjust an actual lighting profile towards the target lighting profile.
Abstract:
In an example, a method of gamut mapping may include generating a plurality of color values in a first color space based on a plurality of measured color values in a second color space using a color specification that maps color values corresponding to the second color space to color values corresponding to the first color space. The method may include generating a second-order or higher response-surface regression model that maps color values corresponding to the first color space to color values corresponding to the first color space.