-
1.发明申请SIMPLE LOW COST TIP-TILT WAVEFRONT SENSOR HAVING EXTENDED DYNAMIC RANGE 有权简单的低成本TIP-TILT WAVEFRONT传感器具有延长的动态范围公开(公告)号：US20140248048A1
公开(公告)日：2014-09-04
申请号：US13785441
申请日：2013-03-05
申请人： Malcolm J. Northcott , J. Elon Graves , Siegfried Fleischer , Paolo Zambon , Jeffrey Tuttle , Rebecca Chang
发明人： Malcolm J. Northcott , J. Elon Graves , Siegfried Fleischer , Paolo Zambon , Jeffrey Tuttle , Rebecca Chang
IPC分类号： H04B10/2507
CPC分类号： H04B10/1125
摘要： A low cost, high reliability system for correcting aberrations in optical signals is disclosed. A foreoptic assembly, such as a telescope, receives an incoming optical signal and directs it to an active optical element, such as a fast steering mirror. The incoming optical signal is diffracted by a diffractive optical element to shape the image that is formed at a wavefront sensor, such as a quad-cell. The wavefront sensor measures a tip-tilt aberration of the incoming optical signal and the active optical element is adjusted to correct the measured aberration. An outgoing optical signal can be transmitted along substantially the same optical path as the incoming optical signal, but in the opposite direction. Thus, the aberration measured from the incoming optical signal can be automatically accounted for in the outgoing optical signal.
摘要翻译： 公开了一种用于校正光信号中的像差的低成本，高可靠性系统。 诸如望远镜的前置组件接收输入光信号并将其引导到诸如快速转向镜的有源光学元件。 入射光信号被衍射光学元件衍射以对形成在波前传感器（例如四单元）上的图像进行成形。 波前传感器测量入射光信号的尖端倾斜像差，并且调整有源光学元件以校正测量的像差。 出射光信号可以沿着与入射光信号基本相同的光路而沿相反方向传输。 因此，可以在出射光信号中自动考虑从入射光信号测量的像差。
-
2.发明授权Iris imaging system using circular deformable mirror mounted by its circumference 有权虹膜成像系统采用圆周可变形反射镜安装公开(公告)号：US08132912B1
公开(公告)日：2012-03-13
申请号：US12494087
申请日：2009-06-29
CPC分类号： A61B3/1216 , A61B3/14 , G02B26/0825
摘要： A rapid iris acquisition, tracking, and imaging system can be used at longer standoff distances and over larger capture volumes, without the active cooperation of subjects. Eye reflections from the subjects' eyes are used to steer a high resolution camera to the eyes in order to capture images of the irises. A circular deformable minor driven by one or more annular forces can be used to focus the camera. A circular mirror substrate is mounted by its circumference onto a minor mount and driven by an annular drive element that contacts the minor substrate along a ring. If the annular drive element has a certain diameter relative to the circumference of the mirror substrate, the mirror substrate will be deformed in the shape of a sphere.
摘要翻译： 快速虹膜采集，跟踪和成像系统可以在更长的距离距离和更大的捕获体积下使用，而不需要主体的积极配合。 来自受试者的眼睛的眼睛反射被用于将高分辨率相机引导到眼睛以便捕获虹膜的图像。 可以使用由一个或多个环形力驱动的圆形可变形小块来聚焦相机。 圆形反射镜基板由其圆周安装到次安装座上，并由环形驱动元件驱动，环形驱动元件沿环形接触次要基板。 如果环形驱动元件相对于镜面基板的圆周具有一定的直径，则反射镜基板将以球形变形。
-
3.发明授权Scale-invariant, resolution-invariant iris imaging using reflection from the eye 有权使用来自眼睛的反射的尺度不变，分辨率不变的虹膜成像公开(公告)号：US08243133B1
公开(公告)日：2012-08-14
申请号：US12493899
申请日：2009-06-29
申请人： Malcolm J. Northcott , J. Elon Graves , Dan Potter
发明人： Malcolm J. Northcott , J. Elon Graves , Dan Potter
CPC分类号： G06K9/00604
摘要： An optical system includes an active focus element that maintains an image in focus over a range of object distances. The active focus element and aperture stop are positioned such that the image scale and the image spatial resolution are also invariant (or at least have a reduced sensitivity) with respect to object distance.
摘要翻译： 光学系统包括主动聚焦元件，其在对象距离的范围内保持图像焦点。 定位有源聚焦元件和孔径光阑使得图像尺度和图像空间分辨率相对于物体距离也是不变的（或至少具有降低的灵敏度）。
-
公开(公告)号：US06721510B2
公开(公告)日：2004-04-13
申请号：US09892913
申请日：2001-06-26
IPC分类号： H04B1000
CPC分类号： H04B10/1125
摘要： A free-space optical data transmission system, comprised of first and second transceivers spaced a substantial distance from each other and having telescopes aimed at each other. Each transceiver has a light transmitter for transmitting data-encoded light from its telescope to the other telescope, and a light receiver for receiving the data-encoded light from the other telescope. Each transceiver has a wavefront sensor for determining the curvature of the wavefront of light transmitted between the telescopes, which light wavefront may be distorted by atmospheric aberrations, a deformable curvature mirror operably connected to the wavefront sensor and positioned in the path of the data-encoded light for modifying the wavefront curvature of the data-encoded light in response to the wavefront curvature determined by the wavefront sensor. Preferably, each transceiver has an arrangement for distinguishing/separating the transmitted and received light waves for bi-directional data transmission.
摘要翻译： 一种自由空间光数据传输系统，包括彼此间隔相当距离且具有彼此瞄准的望远镜的第一和第二收发器。 每个收发器具有用于将数据编码的光从其望远镜传输到另一望远镜的光发射器，以及用于接收来自另一望远镜的数据编码光的光接收器。 每个收发器具有用于确定在望远镜之间传输的光的波前的曲率的波前传感器，所述光波阵面可能由大气像差扭曲，可变形曲率镜可操作地连接到波前传感器并且位于数据编码的路径中 用于响应于由波前传感器确定的波前曲率来修改数据编码光的波前曲率的光。 优选地，每个收发器具有用于区分/分离发射和接收的光波用于双向数据传输的装置。
-
公开(公告)号：US06439720B1
公开(公告)日：2002-08-27
申请号：US09769892
申请日：2001-01-25
IPC分类号： A61B310
摘要： An apparatus for measuring optical aberrations of the human eye wherein the person positions his or her eye on an optical axis of the apparatus and looks at an illuminated target on the optical axis that is visible to the eye for allowing the eye to focus on the target and establish a position of the eye. A collimating lens on the optical axis is movable along the optical axis for adjusting the apparent optical distance between the eye and the target. A light source directs a predetermined light beam along the optical axis into the eye and onto the retina of the eye as a spot of light. A lens reimages the light scattered from the light spot on the eye retina into a wavefront curvature sensor that forms two oppositely defocused images on an image detector, and a computer processes and analyzes the two defocused images for measuring the optical aberrations of the eye.
-
公开(公告)号：US20130089240A1
公开(公告)日：2013-04-11
申请号：US13453151
申请日：2012-04-23
CPC分类号： G06K9/00604
摘要： A portable, hand held iris imaging system captures iris images that may be used in biometric identification. The system is constructed using two separate but coupled subsystems. A first subsystem augments the underlying functionality of the second subsystem. The first subsystem uses an iris camera to capture iris images. A tunable optical element positioned between the subject and the iris camera focuses light reflected from the subject's eye onto the iris camera. A controller coordinates the capture of the iris image with the second subsystem. The second subsystem captures face images of the subject, which are provided to a display through a computer. The user interface is overlaid over the face images to provide visual feedback regarding how the system can be properly repositioned to capture iris images. The system has a portable form factor so that it may be easily operated.
摘要翻译： 便携式手持虹膜成像系统捕获可用于生物识别的虹膜图像。 该系统使用两个单独但耦合的子系统构建。 第一个子系统增强了第二个子系统的基础功能。 第一个子系统使用虹膜相机捕获虹膜图像。 定位在被摄体和虹膜相机之间的可调光学元件将从被摄体的眼睛反射的光聚焦到光圈相机上。 控制器与第二个子系统协调捕获虹膜图像。 第二个子系统通过计算机捕获被提供给显示器的被摄体的脸部图像。 用户界面覆盖在脸部图像上，以提供有关如何正确重新定位系统以捕获虹膜图像的视觉反馈。 该系统具有便携式外形尺寸，使其可以容易地操作。
-
公开(公告)号：US07418115B2
公开(公告)日：2008-08-26
申请号：US11765401
申请日：2007-06-19
IPC分类号： G06K9/00
CPC分类号： G06K9/00604 , A61B3/1216 , A61B5/117
摘要： A rapid iris acquisition, tracking, and imaging system can be used at longer standoff distances and over larger capture volumes, without the active cooperation of subjects. The captured iris images can be used for biometric identification. Light illuminates the subjects' eyes. Reflections from the eyes are used to steer a high resolution camera to the eyes in order to capture images of the irises.
摘要翻译： 快速虹膜采集，跟踪和成像系统可以在更长的距离距离和更大的捕获体积下使用，而不需要主体的积极配合。 捕获的虹膜图像可用于生物识别。 光照亮受试者的眼睛。 眼睛的反射用于将高分辨率摄像机引导到眼睛以捕获虹膜的图像。
-
公开(公告)号：US07019888B1
公开(公告)日：2006-03-28
申请号：US10688087
申请日：2003-10-16
IPC分类号： G02B26/00
CPC分类号： G02B7/183 , G02B7/1827 , G02B26/0825
摘要： A deformable mirror for an adaptive optics system includes a number of electrodes for causing deformation of the mirror. An insulating layer and a layer of conductive traces over the electrodes allow the connection points for the electrodes to be moved to a perimeter region of the mirror, which facilitates connecting the mirror to a circuit board or other equipment. In one implementation, the deformable mirror is coupled to a circuit board by a strip connector (e.g., a zebra strip connector), which is maintained in a compressed state by a retaining plate.
摘要翻译： 用于自适应光学系统的可变形反射镜包括用于引起反射镜变形的多个电极。 电极上的绝缘层和导电迹线层允许电极的连接点移动到反射镜的周边区域，这有助于将反射镜连接到电路板或其它设备。 在一个实施方式中，可变形反射镜通过带状连接器（例如，斑马带连接器）耦合到电路板，该连接器由保持板保持在压缩状态。
-
公开(公告)号：US06464364B2
公开(公告)日：2002-10-15
申请号：US09769988
申请日：2001-01-25
IPC分类号： G02B2600
CPC分类号： G02F1/29 , G02B26/06 , G02B26/0825 , G02F1/0128
摘要： A deformable curvature mirror capable of controlled deformation by applying electrical voltages to electrode segments on the back of the mirror. Two plates of an electro-restrictive material, such as PZT or PMN, are jointed together with at least one conductive layer sandwiched therebetween. One plate has an outer conductive layer and a mirrored surface on the outer conductive layer. The conductive layers are electrically grounded. The other plate has a pattern of a plurality of electrode segments on the outer surface with each electrode segment having a separate electrical terminal for applying a variable electrical voltage thereto for separately transmitting a variable current through each electrode segment and through at least the other plate for causing variable expansion of the plate and thereby selectively deforming that plate and, in turn, the deformable curvature mirror.
摘要翻译： 一种可变形曲率镜，能够通过向反射镜背面的电极部分施加电压来控制变形。 诸如PZT或PMN的电极限制材料的两个板与夹在其间的至少一个导电层接合在一起。 一个板在外部导电层上具有外部导电层和镜面。 导电层电接地。 另一个板具有在外表面上的多个电极段的图案，其中每个电极段具有用于施加可变电压的单独的电端子，用于单独地传输可变电流通过每个电极段并且至少通过另一个板，用于 导致板的可变膨胀，并因此选择性地使该板变形，并且进而变形曲率镜。
-
公开(公告)号：US06452145B1
公开(公告)日：2002-09-17
申请号：US09579786
申请日：2000-05-26
IPC分类号： G01J120
CPC分类号： G02B26/06 , G01J9/00 , G02B26/0825
摘要： A wavefront sensor for detecting the wavefront produced by light waves from a light source comprises optically refractory or reflective means for receiving the light waves from the light source and producing two defocused pupil images at two different locations along an optical axis. A detector is positioned at a location spaced from the two locations of the two focused pupil images for the detector means to receive and detect two equally and oppositely defocused pupil images. A computer with appropriate software processes the characteristics of the two defocused pupil images from the detector to determine the curvature of the wavefront based on the light intensities with Dirichlet's boundary conditions for the light waves received by the wavefront sensor.
摘要翻译： 用于检测由光源的光波产生的波前的波前传感器包括用于从光源接收光波的光学耐火或反射装置，并且沿着光轴在两个不同位置产生两个散焦的瞳孔图像。 检测器位于与两个聚焦瞳孔图像的两个位置间隔开的位置处，用于检测器装置，以接收和检测两个相等且相对散焦的瞳孔图像。 具有适当软件的计算机处理来自检测器的两个散焦瞳孔图像的特征，以基于由波前传感器接收的光波的Dirichlet边界条件的光强度来确定波前的曲率。
-
-
-
-
-
-
-
-
-
搜索结果
24 条记录 (耗时 0.036 秒)