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1. 发明授权

US06834959B2 Spider-web placido pattern 有权
公开(公告)号：US06834959B2
公开(公告)日：2004-12-28
申请号：US10261539
申请日：2002-09-30
申请人： Gregg D. Niven , Joseph R. Bentley , Barry T. Egan , Lloyd Caldwell , Lloyd Allred
发明人： Gregg D. Niven , Joseph R. Bentley , Barry T. Egan , Lloyd Caldwell , Lloyd Allred
IPC分类号： A61B310
CPC分类号： A61B3/107
摘要： A placido pattern 10 for use in obtaining a topography of an eye, includes a series of spaced arcuate segments 12 centered about a central point 14 and a series of spaced radial lines 16 emanating from the central point 14. Each pair of adjacent radial lines 16 defines a boundary of a portion of the arcuate segments 12.

2. 发明申请

US20060132712A1 Dot radial ringed placido 有权
标题翻译：点径向环状普拉西多
公开(公告)号：US20060132712A1
公开(公告)日：2006-06-22
申请号：US11013597
申请日：2004-12-16
申请人： Donald Grove , Lloyd Allred
发明人： Donald Grove , Lloyd Allred
IPC分类号： A61B3/10
CPC分类号： A61B3/107
摘要： An ophthalmic placido pattern 10 is used to determine a curvature of an anterior surface of a cornea of an eye. The pattern 10 includes a series of alternating light and dark concentric rings 12 and 14 centered about a central point 16. A series of shaped geometric shapes 18 and 20 are placed about at least some of the concentric rings 12 and 14. The shapes 18 and 20 are of a contrasting color with respect to the ring 12 or 14 on which the shape 18 or 20 is placed.
摘要翻译：眼用平滑图案10用于确定眼睛角膜前表面的曲率。图案10包括以中心点16为中心的一系列交替的明暗和同心圆环12和14。围绕至少一些同心环12和14放置一系列成形的几何形状18和20。形状18和20相对于放置形状18或20的环12或14具有对比色。

3. 发明授权

US07281799B2 Corneal topography slit image alignment via analysis of half-slit image alignment 有权
公开(公告)号：US07281799B2
公开(公告)日：2007-10-16
申请号：US11186733
申请日：2005-07-21
申请人： Lloyd Allred
发明人： Lloyd Allred
IPC分类号： A61B3/10
CPC分类号： A61B3/107 , A61B3/135 , A61B3/152
摘要： A corneal topography slit image alignment system 10, includes a half-slit projector 14 for projecting half-slit images onto a patient's eye 16. Half-slit images 28 and 30 are aligned into a single slit image. A camera 18 captures an image of the aligned slit image. Processor 20 including a memory 26 connected to the half-slit projector 12 and the camera 18 analyzes the alignment of the half-slit images 28 and 30. An edge detector 22 detects the edges of each captured half-slit image and determines an amount of misalignment of the half-slit images 28 and 30 relative to half-slit images being aligned into a single slit image. This amount of misalignment allows computer processor 20 to correct the three-dimensional coordinates of the slit images obtained by a slit beam system 14.

4. 发明申请

US20070019158A1 Corneal topography slit image alignment via analysis of half-slit image alignment 有权
标题翻译：通过半狭缝图像对准分析的角膜地形狭缝图像对准
公开(公告)号：US20070019158A1
公开(公告)日：2007-01-25
申请号：US11186733
申请日：2005-07-21
申请人： Lloyd Allred
发明人： Lloyd Allred
IPC分类号： A61B3/14
CPC分类号： A61B3/107 , A61B3/135 , A61B3/152
摘要： A corneal topography slit image alignment system 10, includes a half-slit projector 14 for projecting half-slit images onto a patient's eye 16. Half-slit images 28 and 30 are aligned into a single slit image. A camera 18 captures an image of the aligned slit image. Processor 20 including a memory 26 connected to the half-slit projector 12 and the camera 18 analyzes the alignment of the half-slit images 28 and 30. An edge detector 22 detects the edges of each captured half-slit image and determines an amount of misalignment of the half-slit images 28 and 30 relative to half-slit images being aligned into a single slit image. This amount of misalignment allows computer processor 20 to correct the three-dimensional coordinates of the slit images obtained by a slit beam system 14.
摘要翻译：角膜形貌狭缝图像对准系统10包括用于将半狭缝图像投影到患者眼睛16上的半狭缝投影仪14.半狭缝图像28和30被对准成单个狭缝图像。相机18捕获对准的狭缝图像的图像。包括连接到半狭缝投影仪12的存储器26和相机18的处理器20分析半狭缝图像28和30的对准。边缘检测器22检测每个捕获的半狭缝图像的边缘，并且确定半狭缝图像28和30相对于半狭缝图像的未对准被对准成单个狭缝图像。这种未对准的量使得计算机处理器20能够校正由狭缝光束系统14获得的狭缝图像的三维坐标。

5. 发明申请

US20050231687A1 Edge detector in an ophthalmic eye evaluation system 审中-公开
标题翻译：边缘检测器在眼科眼睛评估系统中
公开(公告)号：US20050231687A1
公开(公告)日：2005-10-20
申请号：US11072369
申请日：2005-03-04
申请人： Lloyd Allred
发明人： Lloyd Allred
IPC分类号： A61B3/107 , A61B3/10
CPC分类号： A61B3/107
摘要： An ophthalmic eye evaluation system 10 includes a pattern 12 of alternating light and dark areas. An illumination source 14 projects the pattern 12 onto a patient's eye 16. A camera 18 captures one or more images of the pattern 12 reflected from the eye 16. A memory 20 is connected to the camera 18 for storing the images of the reflected pattern. An edge detector 22 determines a transition point where the stored reflected pattern alternates from a light area to a dark area. The edge is determined as being at a point 50% between a maximum stored intensity level and a minimum stored intensity level.
摘要翻译：眼睛评估系统10包括交替的明暗区域的图案12。照明源14将图案12投影到患者眼睛16上。相机18捕获从眼睛16反射的图案12的一个或多个图像。存储器20连接到照相机18，用于存储反射图案的图像。边缘检测器22确定存储的反射图案从光区域交替到暗区域的转变点。边缘被确定为在最大存储强度水平和最小存储强度水平之间的50％的点。

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