-
公开(公告)号：US08384978B2
公开(公告)日：2013-02-26
申请号：US12440472
申请日：2007-09-10
申请人： Gregor John McDonald
发明人： Gregor John McDonald
IPC分类号： G02F1/01
CPC分类号： H01S3/06754 , H01S3/0057 , H01S3/0085 , H01S3/06725 , H01S2301/02
摘要： An optical clock comprises a laser oscillator and modulating means arranged to cooperate with the laser oscillator to produce a series a series of phase-modulated optical pulses. The optical clock further comprises an optical fiber arranged to provide compression of the optical pulses, and may also comprise a step-recovery diode arranged to pulse-pick pulses output from the fiber to produce a series of optical clock pulses, depending on the mode of operation of the modulating means. Phase-modulation is carried out a frequency which provides sufficient linewidth broadening to inhibit stimulated Brillouin scattering within the optical fiber. An optical clock of the invention provides a robust and reliable alternative to clocks based on modelocked lasers, and may be assembled from inexpensive, commonly-available components. The repetition rate of a clock of the invention may easily be adjusted by electronic means. Unlike many modelocked lasers, a clock of the invention does not require precise optical alignment.
摘要翻译： 光时钟包括激光振荡器和配置成与激光振荡器配合以产生串联一系列相位调制光脉冲的调制装置。 光学时钟还包括光纤，用于提供光脉冲的压缩，并且还可以包括步进恢复二极管，其被布置成脉冲选择从光纤输出的脉冲以产生一系列光时钟脉冲，这取决于 调制装置的操作。 进行相位调制，该频率提供足够的线宽展宽以抑制光纤内的受激布里渊散射。 本发明的光时钟提供了基于锁模激光器的时钟的鲁棒且可靠的替代方案，并且可以由廉价的，通常可用的组件组装。 本发明的时钟的重复率可以容易地通过电子方式进行调整。 与许多锁模激光器不同，本发明的时钟不需要精确的光学对准。
-
公开(公告)号：US20100002281A1
公开(公告)日：2010-01-07
申请号：US12440472
申请日：2007-09-10
申请人： Gregor John McDonald
发明人： Gregor John McDonald
IPC分类号： G02F1/01
CPC分类号： H01S3/06754 , H01S3/0057 , H01S3/0085 , H01S3/06725 , H01S2301/02
摘要： An optical clock comprises a laser oscillator and modulating means arranged to cooperate with the laser oscillator to produce a series a series of phase-modulated optical pulses. The optical clock further comprises an optical fibre arranged to provide compression of the optical pulses, and may also comprise a step-recovery diode arranged to pulse-pick pulses output from the fibre to produce a series of optical clock pulses, depending on the mode of operation of the modulating means. Phase-modulation is carried out a frequency which provides sufficient linewidth broadening to inhibit stimulated Brillouin scattering within the optical fibre. An optical clock of the invention provides a robust and reliable alternative to clocks based on modelocked lasers, and may be assembled from inexpensive, commonly-available components. The repetition rate of a clock of the invention may easily be adjusted by electronic means. Unlike many modelocked lasers, a clock of the invention does not require precise optical alignment.
摘要翻译： 光时钟包括激光振荡器和配置成与激光振荡器配合以产生串联一系列相位调制光脉冲的调制装置。 光学时钟还包括光纤，用于提供光脉冲的压缩，并且还可以包括步进恢复二极管，其被布置成脉冲选择从光纤输出的脉冲以产生一系列光时钟脉冲，这取决于 调制装置的操作。 进行相位调制，该频率提供足够的线宽展宽以抑制光纤内的受激布里渊散射。 本发明的光时钟提供了基于锁模激光器的时钟的鲁棒且可靠的替代，并且可以由廉价的，通常可用的组件组装。 本发明的时钟的重复率可以容易地通过电子方式进行调整。 与许多锁模激光器不同，本发明的时钟不需要精确的光学对准。
-
公开(公告)号：US20110116687A1
公开(公告)日：2011-05-19
申请号：US12992414
申请日：2009-05-12
CPC分类号： G06K9/00785 , G06K9/6807 , G06K2209/15 , G06K2209/23
摘要： A method of classifying an object, in particular of classifying a vehicle by evaluating the degree of correlation between an image data set corresponding to an image of at least part of the vehicle and each of a plurality of reference data sets each of which corresponds to a reference image of a vehicle comprises the steps of establishing the vehicle's aspect and selecting the plurality of reference data sets from a larger group of such data sets on the basis of the vehicle's aspect. By selecting from the larger group only those reference data sets which correspond to the vehicle's aspect, faster classification is achieved for a given level of processing resources. Alternatively, for a given processing or classification rate, the level of processing resources may be reduced compared to the prior art.
摘要翻译： 一种分类对象的方法，特别是通过评估与车辆的至少一部分的图像相对应的图像数据集与多个参考数据集中的每一个相对应的图像数据集之间的相关程度来对车辆进行分类 车辆的参考图像包括以车辆方面为基础，根据车辆方面从较大组的这种数据集建立车辆方面并选择多个参考数据集的步骤。 通过从较大的组中仅选择对应于车辆方面的参考数据集，对于给定级别的处理资源实现更快的分类。 或者，对于给定的处理或分类率，与现有技术相比，可以减少处理资源的级别。
-
公开(公告)号：US20110002029A1
公开(公告)日：2011-01-06
申请号：US12918885
申请日：2009-03-09
申请人： Gregor John McDonald
发明人： Gregor John McDonald
CPC分类号： H04B10/508 , G04G3/00 , H01S3/005 , H01S3/0085 , H01S3/06754
摘要： An optical clock for generating a series of optical clock pulses, comprises a laser source for generating output having a plurality of spectral components λ1, λ2, . . . λN, an amplitude-modulator arranged to cooperate with the laser source to produce a series of intermediate optical pulses each having the plurality of spectral components, and optical fibre arranged to provide dispersion of each intermediate optical pulse to form a plurality of component pulses each corresponding to a spectral component and to compress each component pulse, the spectral width of each spectral component being sufficient to inhibit stimulated Brillouin scattering (SBS) of the component pulses within the optical fibre. The optical clock may be used for analogue-to-digital conversion of an electrical signal, in which application pulses of respective spectral components are demultiplexed and subsequently detected and digitised in parallel, providing for faster conversion.
摘要翻译： 用于产生一系列光时钟脉冲的光学时钟包括用于产生具有多个光谱分量λ1，λ2的输出的激光源。 。 。 λN，布置成与激光源协作以产生一系列具有多个光谱分量的中间光脉冲的幅度调制器，以及布置成提供每个中间光脉冲的色散以形成多个分量脉冲的光纤，每个分量脉冲各自对应 到频谱分量并压缩每个分量脉冲，每个频谱分量的频谱宽度足以抑制光纤内的分量脉冲的受激布里渊散射（SBS）。 光时钟可以用于电信号的模数转换，其中各个频谱分量的应用脉冲被解复用并且随后被并行地检测和数字化，从而提供更快的转换。
-
公开(公告)号：US20100027087A1
公开(公告)日：2010-02-04
申请号：US12519005
申请日：2007-12-17
IPC分类号： G06E3/00
CPC分类号： G06E3/00
摘要： An optical correlation apparatus is taught which provides a parallel optical signal having a phase modulation representing input data to which a parallel phase modulation based on reference data is applied. In the event of correlation the resulting wavefront is planar and can be interferometrically coupled to give a high intensity signal. The invention involves use of parallel amplitude modulation means for selectively blocking the optical signal in one or more of the channels of the parallel optical signal which allows different sized reference data strings to be searched more easily and also aids in calibration.
摘要翻译： 提供了一种光学相关装置，其提供具有相位调制的并行光信号，该相位调制表示基于参考数据的并行相位调制的输入数据。 在相关的情况下，所得到的波前是平面的，并且可以被干涉地耦合以产生高强度信号。 本发明涉及使用并行幅度调制装置来选择性地阻挡并行光信号的一个或多个信道中的光信号，其允许更容易地搜索不同大小的参考数据串并且还有助于校准。
-
公开(公告)号：US08451433B2
公开(公告)日：2013-05-28
申请号：US12671132
申请日：2008-08-06
IPC分类号： G01C3/08
CPC分类号： G01S17/10
摘要： Range-finding apparatus comprises a source of pulsed radiation of variable repetition rate and a beam-splitter for dividing the pulsed radiation into two portions which are directed respectively to a local retro-reflector and to a retro-reflector co-located with a remote target the range of which is to be determined. The source, beam-splitter and retro-reflectors are arranged in the form of Michelson interferometer together with a detector. The repetition rate of the source is tuned to frequencies f such that round-trip distance to the remote target is mc/f where m is an integer, this condition being detected by observing a heterodyne signal at the detector. Two such frequencies enable range to be determined. The precision with which range is determined may be increased by carrying out interferometry using the two portions. The accuracy of the method does not depend on absolute range (as with triangulation) and is not limited by the speed of timing electronics, as is the case for time-of-flight techniques.
摘要翻译： 测距装置包括可变重复频率的脉冲辐射源和分束器，用于将脉冲辐射分成两部分，分别指向局部回射反射器和与远程目标共同定位的反射器 其范围将被确定。 源，分束器和反射器与迈克尔逊干涉仪一起以检测器的形式布置。 源的重复率被调谐到频率f，使得到远程目标的往返距离是mc / f，其中m是整数，该条件是通过在检测器处观察外差信号来检测的。 两个这样的频率使得能够确定范围。 可以通过使用两部分进行干涉测量来增加确定该范围的精度。 该方法的精度不取决于绝对范围（如三角测量），并不受时间电子设备的速度限制，如飞行时间技术的情况。
-
公开(公告)号：US20100265491A1
公开(公告)日：2010-10-21
申请号：US12671132
申请日：2008-08-06
IPC分类号： G01S17/10
CPC分类号： G01S17/10
摘要： Range-finding apparatus comprises a source of pulsed radiation of variable repetition rate and a beam-splitter for dividing the pulsed radiation into two portions which are directed respectively to a local retro-reflector and to a retro-reflector co-located with a remote target the range of which is to be determined. The source, beam-splitter and retro-reflectors are arranged in the form of Michelson interferometer together with a detector. The repetition rate of the source is tuned to frequencies f such that round-trip distance to the remote target is mc/f where m is an integer, this condition being detected by observing a heterodyne signal at the detector. Two such frequencies enable range to be determined. The precision with which range is determined may be increased by carrying out interferometry using the two portions. The accuracy of the method does not depend on absolute range (as with triangulation) and is not limited by the speed of timing electronics, as is the case for time-of-flight techniques.
摘要翻译： 测距装置包括可变重复频率的脉冲辐射源和分束器，用于将脉冲辐射分成两部分，分别指向局部回射反射器和与远程目标共同定位的反射器 其范围将被确定。 源，分束器和反射器与迈克尔逊干涉仪一起以检测器的形式布置。 源的重复率被调谐到频率f，使得到远程目标的往返距离是mc / f，其中m是整数，该条件是通过在检测器处观察外差信号来检测的。 两个这样的频率使得能够确定范围。 可以通过使用两部分进行干涉测量来增加确定该范围的精度。 该方法的精度不取决于绝对范围（如三角测量），并不受时间电子设备的速度限制，如飞行时间技术的情况。
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.012 秒)
