一种弥补频率响应缺陷的波前重建方法

    公开(公告)号:CN106595879A

    公开(公告)日:2017-04-26

    申请号:CN201611121160.7

    申请日:2016-12-02

    Applicant: 青岛大学

    CPC classification number: G01J9/0215 G01J2009/0234 G01J2009/0249

    Abstract: 本发明属于光学测试技术领域,涉及一种弥补频率响应缺陷的波前重建新方法,通过横向剪切干涉系统获取x方向和y方向的横向剪切干涉图;通过相移法提取x方向和y方向的差分相位;对差分相位进行补零,并对新的阵列进行傅里叶变换,得到傅里叶频谱;通过Shannon插值将傅里叶频谱连续化,并抽取傅里叶频谱组成新的阵列;进行逆向傅里叶变换,并利用相移定理,得到x和y方向的一维相位波前;利用最小二乘法,获得二维相位波前;本发明不增加测量次数,完全可以避免傅里叶变换中带来的频率响应缺陷,并提高了测量的精度和稳定性。

    一种光源相位噪声的测试方法及装置

    公开(公告)号:CN106768398A

    公开(公告)日:2017-05-31

    申请号:CN201611091652.6

    申请日:2016-12-01

    Inventor: 陆凯

    Abstract: 本发明公开了一种光源相位噪声的测试方法及装置,该方法首先在光纤干涉仪的一路延迟光纤上设置相位调制器,并对相位调制器加载调制信号;其次将光源信号沿光纤传输至光纤干涉仪,通过调制信号调制光纤干涉仪生成的干涉信号;最后利用相位生成载波解调方法或者工作点控制的方法对被调制的干涉信号进行解调,获得光源的相位噪声信号,实现光源相位噪声的测量。该装置通过在光纤干涉仪的一路延迟光纤上设置相位调制器,巧妙的使用具有短程差的光纤干涉仪,同步进行相位调制和干涉信号采集,根据干涉的调制波形,通过解调算法计算出相位噪声,完成光源相位噪声的直接测量。不需要高频探测器和高频采集系统,大大简化了系统的结构,降低了产品的价格。

    测量部分相干光空间关联结构的方法及系统

    公开(公告)号:CN107255525A

    公开(公告)日:2017-10-17

    申请号:CN201710473501.5

    申请日:2017-06-21

    Applicant: 苏州大学

    CPC classification number: G01J9/02 G01J2009/0211 G01J2009/0249

    Abstract: 本发明涉及一种测量部分相干光空间关联结构的方法及系统,所述方法包括:待测光源引入扰动、经过多孔阵列结构输出后进行傅里叶变换,记录光源传输至傅里叶平面处的光强;待测光源不引入扰动、经过多孔阵列结构输出后进行傅里叶变换,记录光源传输至傅里叶平面处的光强;将有扰动、无扰动两种情况下记录的光强,分别进行反傅里叶变换和筛选阵列的过滤,将过滤后的结果相减,并反传输至光源平面,即可得到光源平面的交叉谱密度函数,此时,根据关联结构函数、交叉谱密度函数和源场光强的关系,即可得到光源的关联结构。本发明本发明可以同时得到待测光源空间关联结构完整的实部和虚部信息。

    基于子孔径波前振幅调制的斜率和曲率信号提取方法

    公开(公告)号:CN106969844A

    公开(公告)日:2017-07-21

    申请号:CN201710009052.9

    申请日:2017-01-06

    CPC classification number: G01J9/02 G01J2009/0249

    Abstract: 本发明提供一种基于子孔径波前振幅调制的斜率和曲率信号提取方法,具体过程为:在待测光波波前所在的平面上设置分波面元件,所述分波面元件上的每个子孔径内设有四个通光圆孔A、B、C和D,其中通光圆孔A的圆心位于子孔径的中心上,通光圆孔B、C和D的圆心间隔120°均布在通光圆孔A的同心圆上;光电传感器采集光波经分波面元件后所形成光场的干涉图样,并将其存储于存储器中;根据第i个子孔径内的干涉图样,运算器计算待测光波波前在所述分波面元件第i个子孔径内以波面x和y方向上斜率、曲率以及混合曲率值表征的波面位相分布。利用该方法能够获得各个子孔径内以波面x和y方向上斜率、曲率以及混合曲率值表征的波面位相信息,从而实现高阶像差的精确测量。

    Time-multiplexed spectrally controlled interferometry

    公开(公告)号:US09696211B2

    公开(公告)日:2017-07-04

    申请号:US14927320

    申请日:2015-10-29

    Applicant: Artur Olszak

    Inventor: Artur Olszak

    Abstract: A tunable light source having a temporal coherence length such that interference fringes are detected within the optical path difference of the interferometer is spectrally controlled to produce multiple wavelengths during sequential fractions of the integration time of the detector of the interferometer. The wavelengths are selected so as to produce a visible correlogram at each integration time according to spectrally controlled interferometry (SCI) principles. Such different wavelengths may be produced by stepwise or continuous modulation. The modulation step is repeated sequentially while changing the period of modulation to produce a succession of predetermined spatial patterns of interference fringes, as required for interferometric measurements. The approach enables the practice of SCI with common-path apparatus used for conventional phase shifting, thereby combining the advantages of high-coherence and white-light interferometry. A suitable time-modulated source combines a coherent source with an optical modulator and a waveform generator synchronized with the source.

    Optical detector for measuring respective phases of multiple beams apparatus and method

    公开(公告)号:US09945731B1

    公开(公告)日:2018-04-17

    申请号:US14596825

    申请日:2015-01-14

    Abstract: A system includes a source of laser beams forming an array, a source of a reference laser beam, and an optical detector for measuring respective phase differences between the array laser beams and the reference laser beam. The system includes a mask, having apertures with a shape, size and position identical to a shape, size and position of the array laser beams, and positioned in the reference laser beam to form respective beams of the reference laser beam corresponding to the beams from the array laser beams. A phase modulator phase modulates respective beams of one of (a) the array laser beams and (b) the beams of the reference laser from the mask. A photodetector receives the respective array laser beams and the corresponding reference laser beams from the mask to generate a composite signal. Processing circuitry is responsive to the composite signal for generating respective signals representing the phase differences of the individual laser beams from the reference laser beam.

    Interferometer for measuring optical phase differences
    8.
    发明授权
    Interferometer for measuring optical phase differences 失效
    用于测量光学相位差的干涉仪

    公开(公告)号:US4872755A

    公开(公告)日:1989-10-10

    申请号:US164790

    申请日:1988-03-07

    Applicant: Michael Kuchel

    Inventor: Michael Kuchel

    Abstract: For generating several interferograms which differ from each other in the relative phase position between the interfering partial beams, a light source is utilized having a coherence length less than the optical path difference between the two component beams in the measuring path of the interferometer. Furthermore, at least one optical delay device is provided which splits the beam into two component beams and which generates an optical path difference between these component beams which is approximately the same as the optical path difference of the partial beams in the measuring path of the interferometer. Thereafter, the delay device again unites the component beams congruently.

    Abstract translation: 为了在干涉分光束之间的相对相位位置中产生彼此不同的几个干涉图,利用了具有小于干涉仪的测量路径中的两个分量光束之间的光程差的相干长度的光源。 此外,提供至少一个光学延迟装置,其将光束分成两个分量光束,并且在这些分量光束之间产生与干涉仪的测量路径中的部分光束的光程差大致相同的光程差 。 此后,延迟装置再次将分量光束一并整合。

    High speed/low light wavefront sensor system
    9.
    依法登记的发明
    High speed/low light wavefront sensor system 失效
    高速/低光波前传感器系统

    公开(公告)号:USH615H

    公开(公告)日:1989-04-04

    申请号:US146891

    申请日:1988-01-22

    CPC classification number: G01J9/00 G01J2009/0249

    Abstract: A scalable, low light, high speed wavefront sensor system is disclosed for real time sensing of optical wavefronts using: a gateable image intensifier tube (GIIT), a monolithic lenslet array (MLM), a custom high speed switched silicon detector array, high speed analog/digital processing components, which are microprogrammed with signal processing algorithms. The incoming wavefront is reimaged by foreoptics, then divided into multiple subapertures by the use of the MLM. The MLM forms N.times.M target images which are intensified and transferred to a detector array in which the centroid of each target image on the pixels of the detector array define the local tilt aberration of the wavefront in each subaperture. This local tilt in each subaperture is calculated with microcoded implemented algorithms using real time processing electronics. By combining the local tilt in each subaperture with wavefront reconstruction techniques, the conjugate phase map of the original wavefront can be produced for adaptive optic applications. In order to sense a desired wavefront, the "time of arrival" and flux of the incoming beam can be controlled by the processor via the time and duration of the signal to the GIIT.

    METHOD AND DEVICE FOR DETECTING COHERENT RADIATION
    10.
    发明申请
    METHOD AND DEVICE FOR DETECTING COHERENT RADIATION 审中-公开
    用于检测相干辐射的方法和设备

    公开(公告)号:WO2010116288A2

    公开(公告)日:2010-10-14

    申请号:PCT/IB2010/051375

    申请日:2010-03-30

    Inventor: BAIER, Johannes

    Abstract: The present invention relates to a method and device for detecting coherent optical radiation. In the proposed method, an emission wavelength (8) of a laser (5) is tuned or set close to a wavelength (9) of the coherent radiation (3) to be detected. The coherent radiation (3) is coupled into the laser cavity and a resulting periodic modulation in output power of the laser emission of the laser are measured or detected. The proposed method and device are only sensitive to coherent radiation in a narrow wavelength range.

    Abstract translation: 本发明涉及用于检测相干光辐射的方法和设备。 在所提出的方法中,激光器(5)的发射波长(8)被调谐或设置为接近待检测的相干辐射(3)的波长(9)。 相干辐射(3)耦合到激光腔中,并且测量或检测激光器的激光发射的输出功率中导致的周期性调制。 所提出的方法和装置仅对窄波长范围内的相干辐射敏感。

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