CW Laser wavemeter/frequency locking technique
    1.
    发明授权
    CW Laser wavemeter/frequency locking technique 失效
    CW激光波长计/频率锁定技术

    公开(公告)号:US4631498A

    公开(公告)日:1986-12-23

    申请号:US727457

    申请日:1985-04-26

    CPC classification number: H01S3/1398 G02F2/00 H01S3/0064 H03L7/00

    Abstract: A wavemeter/frequency locking technique suitable for indirectly locking an optical frequency f.sub.0 to a radio frequency f.sub.1 or for locking the radio frequency to the optical frequency. A beam of optical frequency f.sub.0 is phase modulated by a signal of average frequency f.sub.1 that is itself modulated at frequency f.sub.2. The modulated beam is passed through a filter to a detector to produce a detector output signal that has components at linear integral sums of f.sub.1 and f.sub.2. A pair of control signals are generated that are proportional to the amplitude of two of the components of the detector output signal. These control signals are separately used in a pair of servo loops to separately establish fixed values of f.sub.0 /f.sub.f and f.sub.1 /f.sub.f, where f.sub.f is a characteristic frequency of the filter. A method is presented for stepping the value of f.sub.0 /f.sub.f to another value and measuring f.sub.1 /f.sub.2 at each of these values, thereby enabling the value of f.sub.0 to be determined.

    Abstract translation: 一种适用于将光频率f0间接锁定到射频f1或将射频锁定到光频率的波形计/频率锁定技术。 光频f0的光束由本身在频率f2调制的平均频率f1的信号进行相位调制。 调制的光束通过滤波器到达检测器,以产生检测器输出信号,其具有线性积分和f1和f2的分量。 产生与检测器输出信号的两个分量的幅度成比例的一对控制信号。 这些控制信号分别用在一对伺服环路中,以分别建立f0 / ff和f1 / ff的固定值,其中ff是滤波器的特征频率。 提出了一种用于将f0 / ff的值向另一个值进行步长的方法,并且在这些值的每个值处测量f1 / f2,从而确定f0的值。

    Angular michelson interferometer and optical wavemeter based on a
rotating periscope
    2.
    发明授权
    Angular michelson interferometer and optical wavemeter based on a rotating periscope 失效
    基于旋转潜望镜的角度michelson干涉仪和光学波长计

    公开(公告)号:US5583638A

    公开(公告)日:1996-12-10

    申请号:US95630

    申请日:1993-07-21

    CPC classification number: G01J9/0246

    Abstract: The present invention concerns an interferometer for measuring wavelengths using a rotating periscope and a laser of known wavelength. The rotating periscope uses parallel reflectors mounted on a rotating platform. A beam splitter splits an input beam into two optical paths which reflect off the rotating periscope and back reflectors so that the paths will have a path length difference. The beam splitter splits a reference beam from the laser with known wavelength into two reference optical paths which counter-propagate the input beam's optical paths. The light is recombined in a beam splitter to form an interference signal and a reference interference signal so that the input beam's wavelength can be determined.

    Abstract translation: 本发明涉及一种用于使用旋转潜望镜和已知波长的激光测量波长的干涉仪。 旋转潜望镜使用安装在旋转平台上的平行反射器。 分束器将输入光束分成两个反射离开旋转潜望镜和后反射器的光路,使得路径具有路径长度差。 分束器将具有已知波长的激光器的参考光束分离成两个反向传播输入光束的光路的参考光路。 光束在分束器中重新组合以形成干涉信号和参考干扰信号,从而可以确定输入光束的波长。

    Digital integtrating mixer
    3.
    发明授权

    公开(公告)号:US4906875A

    公开(公告)日:1990-03-06

    申请号:US191930

    申请日:1988-05-09

    CPC classification number: H03L7/00

    Abstract: A digital integrating mixer is described including a bandpass filter for filtering an input signal, a comparator for comparing the filtered signal to a reference signal to provide an output which may be of one of two values. A cascaded string of D flip-flops samples the comparator output at predetermined times to provide a first and second type of sample. The time interval between any two samples of the same type is an integral multiple of the cycles of the input signal. The time interval between any two samples of different types is different from an integral multiple of a cycle of the input signal. The mixer also includes a counter which counts up when the sample is of the first value and counts down when the sample is of the second value, when the sample is of the first type, and counts in the opposite direction when the sample is of the second type. If the string of D flip-flops samples approximately an equal number of the first and second types of samples, DC offset in the mixer is reduced. In addition a two channel digital integrating mixer with an analogous structure is disclosed. In the two channel mixer, the string of D flip-flops may also be used to sample the comparator output at predetermined times to provide four types of samples where the time interval between any two samples of the same type is an integral multiple of a cycle of the input signal. The time interval between any first type of sample and any second type of sample is different from an integral multiple of a cycle of the input signal; the same is true between the third and fourth types of samples. The time between any first and second type of sample and any third and fourth type of sample is other than a multiple of a half cycle of the input signal. A first counter is used to count in response to the first or second types of samples and the second in response to the third or fourth types of samples in the same manner as in the single channel mixer. If the string of D flip-flops samples approximately equal number of first and second types of samples and approximately an equal number of third and fourth types of samples, DC offset in the two channel mixer is reduced.

    Phosphor film composition for use in image capture
    5.
    发明授权
    Phosphor film composition for use in image capture 失效
    用于图像捕获的荧光膜组合物

    公开(公告)号:US5622807A

    公开(公告)日:1997-04-22

    申请号:US338922

    申请日:1994-11-14

    Abstract: The present invention is a composition for use in constructing a photosensitive film for recording color images. The preferred composition includes first, second, and third particle types. Each particle type comprises a crystalline base material having a trap dopant and a color dopant deposited therein. Each of the color dopants has a different activation energy for releasing electrons into the conduction/communication band of the crystalline base material. This results in a different spectral sensitivity for each dopant, and, hence for each particle type. In addition, each of the trap dopants has a different activation energy for releasing trapped electrons into the conduction/communication band of the crystalline base material. This enables the recorded color image to be read out one color at a time, which avoids color distortion.The invention also provides a photosensitive film for recording a color image. The film comprises a backing material having a plurality of depressions therein. The depressions are filled with a photosensitive material that includes first, second, and third particle types. Each particle type comprises a crystalline base material doped with atoms of a trap dopant and a color dopant. Each color dopant has a different spectral sensitivity, and each trap dopant has a different activation energy for releasing trapped electrons into the conduction/communication band of the crystalline base material.

    Abstract translation: 本发明是用于构建用于记录彩色图像的感光膜的组合物。 优选的组合物包括第一,第二和第三颗粒类型。 每个颗粒类型包括具有陷阱掺杂剂和沉积在其中的着色掺杂剂的晶体基材。 每个彩色掺杂剂具有不同的活化能,用于将电子释放到结晶基材的导电/连通带中。 这导致每种掺杂剂的不同光谱灵敏度,因此对于每种颗粒类型。 此外,每个陷阱掺杂剂具有不同的活化能,用于将捕获的电子释放到结晶基材的导电/连通带中。 这使得能够一次读出记录的彩色图像,避免颜色失真。 本发明还提供一种用于记录彩色图像的感光膜。 该膜包括其中具有多个凹陷的背衬材料。 凹陷中填充有包括第一,第二和第三颗粒类型的感光材料。 每个粒子类型包括掺杂有陷阱掺杂剂的原子的结晶基材和颜色掺杂剂。 每个颜色掺杂剂具有不同的光谱灵敏度,并且每个陷阱掺杂剂具有不同的活化能,用于将捕获的电子释放到晶体基材的传导/连通带中。

    C. W. laser wavemeter/frequency locking technique
    6.
    发明授权
    C. W. laser wavemeter/frequency locking technique 失效
    C. W.激光波长计/频率锁定技术

    公开(公告)号:US4746878A

    公开(公告)日:1988-05-24

    申请号:US883238

    申请日:1986-07-08

    CPC classification number: H03L7/00 G02F2/00 H01S3/0064 H01S3/1398

    Abstract: A wavemeter/frequency locking technique suitable for indirectly locking an optical frequency f.sub.0 to a radio frequency f.sub.1 or for locking the radio frequency to the optical frequency. A beam of optical frequency f.sub.0 is phase modulated by a signal of average frequency f.sub.1 that is itself modulated at frequency f.sub.2. The modulated beam is passed through a filter to a detector to produce a detector output signal that has components at linear integral sums of f.sub.1 and f.sub.2. A pair of control signals are generated that are proportional to the amplitude of two of the components of the detector output signal. These control signals are separately used in a pair of servo loops to separately establish fixed values of f.sub.0 /f.sub.f and f.sub.1 /f.sub.f, where f.sub.f is a characteristic frequency of the filter. A method is presented for stepping the value of f.sub.0 /f.sub.f to another value and measuring f.sub.1 /f.sub.2 at each of these values, thereby enabling the value of f.sub.0 to be determined.

    Abstract translation: 一种适用于将光频率f0间接锁定到射频f1或将射频锁定到光频率的波形计/频率锁定技术。 光频f0的光束由本身在频率f2调制的平均频率f1的信号进行相位调制。 调制的光束通过滤波器到达检测器,以产生检测器输出信号,其具有线性积分和f1和f2的分量。 产生与检测器输出信号的两个分量的幅度成比例的一对控制信号。 这些控制信号分别用在一对伺服环路中,以分别建立f0 / ff和f1 / ff的固定值,其中ff是滤波器的特征频率。 提出了一种用于将f0 / ff的值向另一个值进行步长的方法,并且在这些值的每个值处测量f1 / f2,从而确定f0的值。

    Waveguide array document scanner
    8.
    发明授权
    Waveguide array document scanner 失效
    波导阵列文档扫描仪

    公开(公告)号:US5930433A

    公开(公告)日:1999-07-27

    申请号:US898935

    申请日:1997-07-23

    CPC classification number: G02B6/06 G02B6/4249

    Abstract: The optical scanner comprises a light source, an image sensor, a planar array of elongate optical waveguides, and input and output coupling optics for communicating light to and from the image transmission optics. The light source is adapted to direct light toward and reflect light from an object to be scanned. The planar array of elongate optical waveguides is formed in a substrate. Each of the waveguides include an input end and an output end and can be tapered along the length of the waveguide. The input optics disposed between the object and the waveguide array can include tubes, single lenses per waveguide, larger lenses per cluster of waveguides, a GRIN lens array or comparable mirror systems for directing light reflected from the object to be scanned to the input ends of the waveguides. The output optics disposed between the waveguide array and the image sensor can include lenses or mirror systems similar to that used for the input coupling optics.

    Abstract translation: 光学扫描器包括光源,图像传感器,细长光波导的平面阵列,以及用于将光与图像传输光学器件通信的输入和输出耦合光学器件。 光源适于将光引导并反射来自待扫描物体的光。 细长光波导的平面阵列形成在衬底中。 每个波导包括输入端和输出端,并且可以沿着波导的长度逐渐变细。 设置在物体和波导阵列之间的输入光学器件可以包括管,每个波导的单个透镜,每个波导阵列的较大透镜,GRIN透镜阵列或类似的镜像系统,用于将从被扫描对象反射的光引导到 波导。 布置在波导阵列和图像传感器之间的输出光学器件可以包括类似于用于输入耦合光学器件的透镜或镜像系统。

    Frequency locking device
    9.
    发明授权
    Frequency locking device 失效
    频率锁定装置

    公开(公告)号:US4925302A

    公开(公告)日:1990-05-15

    申请号:US181129

    申请日:1988-04-13

    CPC classification number: G02F1/0327 H01S3/1304

    Abstract: An improved frequency locking circuit suitable for indirectly locking an optical frequency f.sub.0 to a radio frequency f.sub.1 or of locking the radio frequency to the optical frequency. A beam of optical frequency f.sub.0 is modulated by a compound signal which is the sum of a signal at frequency f.sub.2 and an FM subcarrier at frequency f.sub.1 that is phase modulated at frequency f.sub.3 to produce a phase modulated beam. The phase modulated beam is filtered by a filter having a transfer function having a characteristic frequency f.sub.f. A pair of control signals are generated that are proportional respectively to the amplitudes of two components of the filtered signal at frequencies f.sub.2, f.sub.3. These control signals are separately used in a pair of servo loops to separately establish fixed values of f.sub.0 /f.sub.f and f.sub.1 /f.sub.f. By using an optical cavity of the filter, the frequency locking circuit may be used for measuring the refractive index of a gas. The circuit may also be used for calibrating a multi-mode filter.

    Abstract translation: 一种改进的频率锁定电路,适用于将光频率f0间接锁定到射频f1或将射频锁定到光频率。 光频f0的波束由频率为f2的信号和频率为f1的频率为f1的FM副载波的和的复合信号调制,频率为f3的相位调制,以产生相位调制波束。 相位调制波束由具有特征频率ff的传递函数的滤波器滤波。 产生一对控制信号,它们分别与频率为f2,f3的滤波信号的两个分量的幅度成比例。 这些控制信号分别用在一对伺服回路中,以分别建立f0 / ff和f1 / ff的固定值。 通过使用滤光器的光腔,频率锁定电路可以用于测量气体的折射率。 电路也可用于校准多模式滤波器。

    Solid state based illumination source for a projection display
    10.
    发明授权
    Solid state based illumination source for a projection display 失效
    用于投影显示的基于固态的照明源

    公开(公告)号:US06364487B1

    公开(公告)日:2002-04-02

    申请号:US09240198

    申请日:1999-01-29

    CPC classification number: H04N5/74 G03B21/2033 G03B21/2073

    Abstract: An illumination source for use in projectors and the like. The illumination source includes a light source that generates a two-dimensional emission pattern having a light intensity that varies as a function of position in the emission pattern. A collector collects the light from the light source and illuminates an exit aperture therewith. The illuminated exit aperture has a two-dimensional emission pattern with a light intensity that varies as a function of position in a manner that is more uniform as a function of position than the emission pattern of the light source. An imaging optical element images the exit aperture onto a surface. The collector is preferably a compound parabolic concentrator or a compound elliptical concentrator. In one embodiment of the invention, a partially reflecting film is placed between the exit aperture and the imaging optical element. The partially reflecting film reflects light of a first polarization state back into the collector and transmits light of the orthogonal polarization state. In another embodiment of the invention, a quarter wave plate is introduced between the exit aperture and the partially reflecting film to further increase the radiance of the source.

    Abstract translation: 用于投影仪等的照明源。 照明源包括产生具有作为发射图案中的位置的函数而变化的光强度的二维发射图案的光源。 收集器收集来自光源的光并照射出口孔。 照射的出射孔具有二维发射图案,其具有以与光源的发射图案相比作为位置的函数更均匀的方式作为位置的函数而变化的光强度。 成像光学元件将出射孔图像到表面上。 收集器优选为复合抛物面浓缩器或复合椭圆形浓缩器。 在本发明的一个实施例中,部分反射膜被放置在出射孔和成像光学元件之间。 部分反射膜将第一偏振态的光反射回集光体,透射正交偏振态的光。 在本发明的另一个实施例中,在出口孔和部分反射膜之间引入四分之一波片,以进一步增加源的辐射度。

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