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    • 25. 发明申请
    • WAVELENGTH CONTROL OF LASER DIODES
    • 激光二极管的波长控制
    • WO2015159049A1
    • 2015-10-22
    • PCT/GB2015/051077
    • 2015-04-09
    • CRANFIELD UNIVERSITY
    • HODGKINSON, Elizabeth JaneTATAM, Ralph PeterASMARI, Abdullah Shah
    • H01S5/024H01S5/068
    • H01S5/06808G01N21/27G01N21/39G01N33/0047G01N2021/399G01N2201/062H01S5/02415H01S5/06804
    • This invention generally relates to a method of controlling emission wavelength of a light emitting device, and a system for wavelength control of a light emitting device, for example for wavelength stabilisation of a laser diode. One method of controlling emission wavelength of a light emitting device comprises: determining an indication of series resistance of the device, the series resistance comprising ohmic resistance of the device; providing a current through the device to maintain light emission of the device; measuring a forward voltage of the device during said light emission, the forward voltage being across an impedance comprising impedance of an active region of the device and the series resistance; determining an indicator of active region voltage on the basis of the measured forward voltage and the determined indicator of series resistance; and controlling a temperature of the device on the basis of the determined indicator of active region voltage.
    • 本发明一般涉及一种控制发光器件的发射波长的方法,以及用于发光器件的波长控制的系统,例如用于激光二极管的波长稳定。 控制发光器件的发射波长的一种方法包括:确定器件串联电阻的指示,串联电阻包括器件的欧姆电阻; 提供通过该装置的电流以维持装置的发光; 在所述发光期间测量所述器件的正向电压,所述正向电压跨过包括所述器件的有源区域的阻抗和所述串联电阻的阻抗; 基于所测量的正向电压和确定的串联电阻指示器确定有源区电压的指示; 以及基于所确定的有源区电压的指示器来控制所述装置的温度。
    • 26. 发明申请
    • IMAGE PROCESSING
    • 图像处理
    • WO2013034878A2
    • 2013-03-14
    • PCT/GB2012/000705
    • 2012-09-10
    • CRANFIELD UNIVERSITYBRECKON, TobyKATRAMADOS, Ioannis
    • BRECKON, TobyKATRAMADOS, Ioannis
    • G06K9/46
    • G06K9/4671G06K9/4628
    • Apparatus for generating a visual saliency data signal S comprises an input for an image data signal U 1 of resolution w x h and an output for a visual saliency data signal S. The apparatus is configured to successively downsample the image data signal U 1 using a Gaussian filter n-1 times to create a first Gaussian pyramid having an nth data level signal Un of resolution (w/2 n-1 ) x (h/ 2n-1 ); thereafter successively upsample the data level signal U n using a Gaussian filter n-1 times to create a second Gaussian pyramid having a base data level signal D 1 , thereafter calculate a minimum ratio signal matrix M, where and thereafter generate a visual saliency data signal S, wherein S ij = 1 - M ij .
    • 用于生成视觉显着性数据信号S的设备包括用于分辨率为wxh的图像数据信号U1的输入和用于视觉显着性数据信号S的输出。设备 被配置为使用高斯滤波器n-1次来连续下采样图像数据信号U 1以创建具有第n数据电平信号Un的分辨率(w / 2n-1)的第一高斯金字塔, 1)x(h / <2n-1 ); 之后使用高斯滤波器n-1次连续上采样数据电平信号U n以创建具有基本数据电平信号D 1的第二高斯金字塔,然后计算最小值 比率信号矩阵M,其中和此后生成视觉显着性数据信号S,其中S ij = 1 -M ij。