Method for generating light spectra and corresponding device

    公开(公告)号:US11363689B2

    公开(公告)日:2022-06-14

    申请号:US17266504

    申请日:2019-07-31

    IPC分类号: H05B45/22 H05B47/11 H05B47/16

    摘要: Method for generating light spectra and corresponding device. Starting from a plurality of light sources (2), comprising the steps of selecting a target colour from a target region (7) of a colour space, and emitting a target light (6) from said light sources (2) according to a weighted combination of light sources (2) corresponding to said target colour, using an output model (3) which is optimized according to an optimization parameter, and previously determined in a modelling stage comprising: —calculating a plurality of mixed spectra (4), as weighted combinations of said plurality of light sources (2), their colour coordinates and their optimization parameters; —partitioning in sectors a modelling region (5) of said colour space; —for each sector, selecting the mixed spectrum having the best optimization parameter; thus obtaining an optimized weighted combination; —using the optimized weighted combinations, establishing a correspondence between colours and weighted combinations; —thus obtaining said output model (3).

    REDUCING OPTICAL CROSSTALK EFFECTS IN SILICON-BASED PHOTOMULTIPLIERS

    公开(公告)号:US20220116555A1

    公开(公告)日:2022-04-14

    申请号:US17532589

    申请日:2021-11-22

    IPC分类号: H04N5/359 H04N5/378

    摘要: Silicon-based photomultipliers (SiPMs) for reducing optical crosstalk effects in the SiPMs are provided. The SiPMs include macrocells. Each macrocell includes microcells, coupled in parallel, and a reading circuit coupled to an output of each macrocell. The microcells are arranged in the SiPM so that adjacent microcells belong to different macrocells. When a microcell performs a detection, the reading circuit of each macrocell having one or more microcells adjacent to the microcell that performed the detection is configured to disable its output signal during a predefined period of time. PET devices or systems and methods for reducing crosstalk effects are also provided.