公开(公告)号：US06236877B1

公开(公告)日：2001-05-22

申请号：US09016112

申请日：1998-01-30

申请人： Ann E. Elsner ,  Robert H. Webb ,  Andreas W. Dreher

发明人： Ann E. Elsner ,  Robert H. Webb ,  Andreas W. Dreher

IPC分类号： A61B505

CPC分类号： A61B3/12

摘要： An apparatus for separating an image of a target into a directly scattered component and a multiply scattered component by providing a stationary field stop having a first region and associated detector confocal to a point on the target. During a first interval, a light source directs a first beam to the target and the directly scattered component is selected by the first region. During a second interval, the light source directs a second beam to the target and the multiply scattered component us selected by the first region and its associated detector. Alternatively, a light source directs a first beam to the target and the directly scattered component is selected by the first region of the field stop and its associated detector, while the second region and its associated detector select for multiply scattered light.

摘要翻译： 一种用于通过提供具有第一区域和相关联的检测器的固定场停止来将目标图像分离为直接散射分量和多重散射分量的装置，其与目标物上的点共焦。 在第一间隔期间，光源将第一光束引导到目标，并且第一区域选择直接散射的分量。 在第二间隔期间，光源将第二光束引导到目标和由第一区域及其相关联的检测器选择的乘法散射分量。 或者，光源将第一光束引导到目标，并且由场致动器的第一区域及其相关联的检测器选择直接散射的分量，而第二区域及其相关联的检测器选择多个散射光。

公开(公告)号：US6099125A

公开(公告)日：2000-08-08

申请号：US206464

申请日：1998-12-07

申请人： Robert H. Webb ,  Stephen A. Burns ,  Carl Murray Penney

发明人： Robert H. Webb ,  Stephen A. Burns ,  Carl Murray Penney

IPC分类号： A61B3/103 ,  A61B3/10

CPC分类号： A61B3/1015

摘要： A refractometer provides a reference path coaxial with a measurement path and thereby simplifies construction by reducing the number of parts and simplifies maintenance by halving the number of optical axes to be aligned. The refractometer includes a reference projector for projecting a reference pattern on a reference pattern position on a detector during a reference interval, a site-selector for selecting a measurement site on an optical system, and a measurement projector for projecting a measurement pattern through this selected measurement site and onto a measurement pattern position on the detector during a measurement interval. The reference projector, the site selector, and the measurement projector are all aligned along the same optical axis. In the case in which the optical system is a human eye, the designated site in typically a site on the cornea and the detector is the retina of the eye. The refractometer provides an aligner for aligning the reference pattern position with a measurement pattern position. The amount by which these two positions are moved in order to achieve alignment provides a measure of the optimal wavefront corresponding to the measurement site.

摘要翻译： 折射计提供与测量路径同轴的参考路径，从而通过减少部件的数量来简化结构，并通过将对准的光轴的数量减半来简化维护。 折射计包括参考投影仪，用于在参考间隔期间将基准图案投影在检测器上的参考图案位置上，用于在光学系统上选择测量位置的位置选择器，以及用于通过所选择的投影测量图案投影测量图案的测量投影仪 测量位置和测量间隔内的检测器上的测量图案位置。 参考投影机，现场选择器和测量投影机都沿着相同的光轴对齐。 在光学系统是人眼的情况下，通常在角膜和检测器上的位置的指定部位是眼睛的视网膜。 折射计提供了一个对准器，用于将参考图案位置与测量图案位置对准。 移动这两个位置以实现对准的量提供对应于测量位置的最佳波阵面的量度。

公开(公告)号：US4764005A

公开(公告)日：1988-08-16

申请号：US876231

申请日：1986-06-19

申请人： Robert H. Webb ,  George W. Hughes

发明人： Robert H. Webb ,  George W. Hughes

IPC分类号： A61B3/12 ,  A61B3/14 ,  A61B3/10

CPC分类号： A61B3/1025

摘要： An optical instrument which operates with an incident optical beam scanned at high rates and with correspondingly small sized scanning devices, has a double-scanning optical system. The output reflected beam that is detected overfills the first-stage scanning element, yet the instrument attains a relatively high-contrast image. The instrument provides for astigmatism correction, graphic generation in the scanned beam, and the use of infrared wavelength laser beams as well as visible wavelength laser beams. It also provides for generating system timing pulses from a rotating scanning element.

摘要翻译： 以高速扫描的入射光束和相应小尺寸扫描装置工作的光学仪器具有双扫描光学系统。 检测到的输出反射光束超过第一级扫描元件，但是仪器获得相对高对比度的图像。 该仪器提供散光校正，扫描光束中的图形生成，以及使用红外波长激光束以及可见波长激光束。 它还提供从旋转扫描元件产生系统定时脉冲。