公开(公告)号：US20030086058A1

公开(公告)日：2003-05-08

申请号：US09992497

申请日：2001-11-06

Applicant: Leica Microsystems Inc.

Inventor： Christopher J. Percival ,  Douglas H. Hoover

IPC: A61B003/14

CPC classification number: A61B3/113 ,  A61B3/1208

Abstract: A fast position detection system and related method for an ophthalmic instrument utilize stored geometrical relationships determined by multiple regression during instrument calibration to compute X-Y-Z alignment status of the instrument relative to a patient's eye based on local x-y position information from a pair of lateral detectors receiving corneally reflected light from a corresponding pair of lateral light sources. In a preferred embodiment, the lateral detectors are quad-cell detectors. A heads-up display image is preferably provided along an optical axis of the instrument for supplying instructive cues to an operator for moving the instrument to achieve alignment, whereby the operator sees both a macro-image of the patient's eye and the display image. The speed of the position detection system makes it particularly suitable for use in hand-held ophthalmic instruments.

Abstract translation: 用于眼科仪器的快速位置检测系统和相关方法利用在仪器校准期间由多个回归确定的存储的几何关系，以基于来自一对接收角膜的横向检测器的局部xy位置信息来计算器械相对于患者眼睛的XYZ对准状态 来自相应的一对横向光源的反射光。 在优选实施例中，横向检测器是四单元检测器。 优选地，沿着仪器的光轴提供平视显示图像，用于向操作者提供用于移动仪器以实现对准的指导线索，由此操作者看到患者眼睛的宏观图像和显示图像。 位置检测系统的速度使其特别适用于手持式眼科仪器。

公开(公告)号：US20020159050A1

公开(公告)日：2002-10-31

申请号：US09842463

申请日：2001-04-26

Applicant: Leica Microsystems Inc.

Inventor： Keshav D. Sharma ,  Kyle R. Bleyle

IPC: G01N021/41

CPC classification number: G01N33/143 ,  G01N21/43 ,  G01N33/30 ,  G01N2201/0221

Abstract: A hand-held automatic refractometer comprises a linear scanned array having a plurality of photoelectric cells and an optical system for directing light onto the array, the particular photoelectric cells of the array which are illuminated by said light being determined by the index of refraction of a sample substance placed on a sample surface of a prism of the optical system. A reflective surface is arranged close to the array at an acute angle thereto for directing primary light from the sample-prism boundary to the array, and for redirecting stray reflected light from the array back onto the array. The disclosed refractometer has a compact design wherein the linear array extends in a direction substantially parallel to the prism sample surface. The prism is mounted in a housing and the sample surface faces upward to allow access through a sample well of the housing, while the array is mounted in the housing facing in a downward direction.

Abstract translation: 手持式自动折射计包括具有多个光电单元的线性扫描阵列和用于将光引导到阵列上的光学系统，由所述光照射的阵列的特定光电单元由折射率 样品物质放置在光学系统的棱镜的样品表面上。 反射表面以锐角配置在阵列附近，用于将来自样品 - 棱镜边界的初级光引导到阵列，并将来自阵列的杂散反射光重新引导到阵列上。 所公开的折射计具有紧凑的设计，其中线性阵列在基本上平行于棱镜样品表面的方向上延伸。 棱镜安装在壳体中，并且样品表面面向上以允许通过壳体的样品阱进入，同时阵列安装在面向下方的壳体中。