Variable focus optical system and method using electro-optic material
    3.
    发明授权
    Variable focus optical system and method using electro-optic material 失效
    可变焦光学系统和使用电光材料的方法

    公开(公告)号:US4861975A

    公开(公告)日:1989-08-29

    申请号:US310027

    申请日:1989-02-08

    IPC分类号: G01B11/02 G02B7/32 G02B27/52

    CPC分类号: G02B7/32 G01B11/026 G02B27/52

    摘要: Variable focus optical system in which a light beam is projected through a transparent flat cell of electro-optic material coated on both sides with a layer of transparent conductive material. The layer on one side of the cell is divided into a central disc region and a ring shaped region which surrounds the central region. A lens focuses the light transmitted through the cell at a predetermined distance from the lens. An AC voltage is applied between one of the regions and the layer on the opposite side of the cell to vary the phase of the light passing through that region and focus that portion of the light at a distance which varies periodically with the AC voltage. A reflective surface is positioned at the distance from the lens where the unshifted light is focused, and a detector receives the light reflected from the reflective surface and provides an output signal indicative of the position of the surface.

    摘要翻译: 可变焦光学系统,其中光束通过透明的电光材料扁平单元投影,两侧均涂覆有一层透明导电材料。 单元一侧的层分为中心圆盘区域和围绕中心区域的环形区域。 透镜将透过单元的光聚焦在与透镜预定距离处。 在区域之一和单元的相对侧上的层之间施加AC电压以改变通过该区域的光的相位,并将光的该部分聚焦在与AC电压周期性变化的距离处。 反射表面定位在与未被移动的光聚焦的透镜的距离处,并且检测器接收从反射表面反射的光并且提供表示表面位置的输出信号。

    Optical image processing using maximum or minimum phase functions
    4.
    发明授权
    Optical image processing using maximum or minimum phase functions 有权
    使用最大或最小相位函数的光学图像处理

    公开(公告)号:US09170599B2

    公开(公告)日:2015-10-27

    申请号:US13290982

    申请日:2011-11-07

    IPC分类号: G01J11/00 G01J3/45 G06E3/00

    CPC分类号: G06E3/003 G01J3/45 G01J11/00

    摘要: A method utilizes an optical image processing system. The method includes calculating a product of (i) a measured magnitude of a Fourier transform of a complex transmission function of an object or optical image and (ii) an estimated phase term of the Fourier transform of the complex transmission function. The method further includes calculating an inverse Fourier transform of the product, wherein the inverse Fourier transform is a spatial function. The method further includes calculating an estimated complex transmission function by applying at least one constraint to the inverse Fourier transform.

    摘要翻译: 一种方法利用光学图像处理系统。 该方法包括:计算(i)物体或光学图像的复数传播函数的傅里叶变换的测量幅度和(ii)复数传递函数的傅立叶变换的估计相位项的乘积。 该方法还包括计算乘积的逆傅里叶变换,其中逆傅立叶变换是空间函数。 该方法还包括通过对傅里叶逆变换应用至少一个约束来计算估计的复传输函数。

    Apparatus for measuring a frequency-domain optical coherence tomography power spectrum from a sample
    7.
    发明授权
    Apparatus for measuring a frequency-domain optical coherence tomography power spectrum from a sample 有权
    用于从样本测量频域光学相干断层摄影功率谱的装置

    公开(公告)号:US08219350B2

    公开(公告)日:2012-07-10

    申请号:US13224555

    申请日:2011-09-02

    IPC分类号: G06F17/14 G01N21/00

    摘要: An apparatus is provided for measuring a frequency-domain optical coherence tomography power spectrum from a sample. The apparatus includes a partially reflective element configured to be optically coupled to a light source and to the sample. A first portion of light from the light source is configured to be reflected by the partially reflective element. A second portion of light from the light source is configured to propagate through the partially reflective element, to impinge the sample, and to reflect from the sample. The apparatus is configured to receive the first and second portions of light and to measure the frequency-domain optical coherence tomography power spectrum in response to the first portion of light and the second portion of light.

    摘要翻译: 提供了一种用于从样本测量频域光学相干断层摄影功率谱的装置。 该装置包括被配置为光耦合到光源和样品的部分反射元件。 来自光源的第一部分光被构造成被部分反射元件反射。 来自光源的第二部分光被配置成传播通过部分反射元件,以撞击样品并从样品反射。 该装置被配置为接收第一和第二部分光并且响应于第一部分光和第二部分光来测量频域光学相干断层摄影功率谱。

    Acoustic sensor with at least one photonic crystal slab
    8.
    发明授权
    Acoustic sensor with at least one photonic crystal slab 有权
    具有至少一个光子晶体板的声学传感器

    公开(公告)号:US08160406B2

    公开(公告)日:2012-04-17

    申请号:US12874104

    申请日:2010-09-01

    IPC分类号: G02B6/00 G01B9/02

    CPC分类号: G01H9/00 G01H9/004

    摘要: An acoustic sensor includes at least one structure including at least one photonic crystal slab and an optical fiber optically coupled to the at least one photonic crystal slab, and having at least one optical resonance with a resonance frequency and a resonance lineshape. The acoustic sensor further includes a housing mechanically coupled to the at least one structure. At least one of the resonance frequency and the resonance lineshape is responsive to acoustic waves incident upon the housing.

    摘要翻译: 声学传感器包括至少一个结构,其包括至少一个光子晶体板和光学耦合到所述至少一个光子晶体板的光纤,并且具有至少一个具有谐振频率和谐振线形的光学谐振。 声学传感器还包括机械地联接到所述至少一个结构的壳体。 谐振频率和谐振线形形状中的至少一个响应于入射到壳体上的声波。

    SUPERFLUORESCENT FIBER SOURCE WITH ENHANCED MEAN WAVELENGTH STABILITY
    9.
    发明申请
    SUPERFLUORESCENT FIBER SOURCE WITH ENHANCED MEAN WAVELENGTH STABILITY 有权
    超光纤光源具有增强的平均波长稳定性

    公开(公告)号:US20100220387A1

    公开(公告)日:2010-09-02

    申请号:US12719778

    申请日:2010-03-08

    IPC分类号: H01S3/09

    摘要: A doped superfluorescent fiber source (SFS) has an enhanced mean wavelength stability. A method stabilizes the mean wavelength of a SFS. The method includes pumping the SFS with pump light from a pump source having a wavelength dependent on the temperature of the pump source and dependent on the power of the pump light. The length of the fiber is selected to compromise between reduction of the dependence of the mean wavelength on the pump light power and reduction of the contribution of the forward amplified spantaneous emission light produced by the fiber to the output light.

    摘要翻译: 掺杂的超荧光光纤源(SFS)具有增强的平均波长稳定性。 一种方法稳定了SFS的平均波长。 该方法包括用来自泵浦源的泵浦光泵送SFS,其具有取决于泵浦光源的温度的波长并且取决于泵浦光的功率。 纤维的长度被选择为在平均波长对泵浦光功率的依赖性的降低和由光纤产生的向前放大的自发发射光对输出光的贡献的降低之间的折中。

    Optical image processing using minimum phase functions
    10.
    发明授权
    Optical image processing using minimum phase functions 有权
    使用最小相位函数的光学图像处理

    公开(公告)号:US07643952B2

    公开(公告)日:2010-01-05

    申请号:US11396935

    申请日:2006-04-03

    IPC分类号: G06F17/14 G01N21/00

    CPC分类号: G06E3/003 G01J3/45 G01J11/00

    摘要: A method processes an optical image. The method includes providing a measured magnitude of the Fourier transform of a two-dimensional complex transmission function. The method further includes providing an estimated phase term of the Fourier transform of the two-dimensional complex transmission function. The method further includes multiplying the measured magnitude and the estimated phase term to generate an estimated Fourier transform of the two-dimensional complex transmission function. The method further includes calculating an inverse Fourier transform of the estimated Fourier transform, wherein the inverse Fourier transform is a spatial function. The method further includes calculating an estimated two-dimensional complex transmission function by applying at least one constraint to the inverse Fourier transform.

    摘要翻译: 一种处理光学图像的方法。 该方法包括提供二维复数传输函数的傅立叶变换的测量幅度。 该方法还包括提供二维复数传输函数的傅立叶变换的估计相位项。 该方法还包括将测量的幅度和估计的相位项相乘以产生二维复数传输函数的估计傅里叶变换。 该方法还包括计算傅立叶逆变换的傅立叶逆变换,其中逆傅里叶变换是空间函数。 该方法还包括通过对傅里叶逆变换应用至少一个约束来计算估计的二维复传输函数。