公开(公告)号：WO1992011558A1

公开(公告)日：1992-07-09

申请号：PCT/US1990007603

申请日：1990-12-21

Applicant: ENVIRONMENTAL RESEARCH INSTITUTE OF MICHIGAN

Inventor： ENVIRONMENTAL RESEARCH INSTITUTE OF MICHIGAN ,  MARRON, Joseph, C.

IPC: G02C07/04

CPC classification number: G02C7/12 ,  G02C7/042 ,  G02C7/06

Abstract: A dual focal length ophthalmic lens (10) is formed from a birefringent material with its fast (A-B) and slow (A-C) axes perpendicular to the user's visual axis (A-O). The dual focal property arises due to the differing indices of refraction of the fast (A-B) and slow (A-C) axes. Light emanating from far objects (F) having one polarization and light emanating from near objects (N) having the opposite polarization are both focused onto the user's retina (24). Depending upon which object is being viewed, an in-focus and a blurred image appear simultaneously on the user's retina. The ability of the user's eye/brain system to distinguish between the two images provides bifocal action from a single lens. The invention may take the form of a spectacle (10), contact (26), or intraocular implant lens (32).

Abstract translation: 双焦距眼镜（10）由双折射材料形成，其快速（A-B）和慢（A-C）轴垂直于用户的视轴（A-O）。 由于快速（A-B）和慢（A-C）轴的折射率不同，产生双焦点特性。 从具有一个极化的远物体（F）发出的光和从具有相反极化的近物体（N）发出的光都被聚焦到用户的视网膜（24）上。 根据正在查看的对象，用户的视网膜上同时出现对焦和模糊图像。 用户的眼/脑系统区分两个图像的能力提供了来自单个透镜的双重作用。 本发明可以采取眼镜（10），接触（26）或眼内植入物透镜（32）的形式。

公开(公告)号：WO1996025764A1

公开(公告)日：1996-08-22

申请号：PCT/US1996001902

申请日：1996-02-14

Applicant: ENVIRONMENTAL RESEARCH INSTITUTE OF MICHIGAN

Inventor： ENVIRONMENTAL RESEARCH INSTITUTE OF MICHIGAN ,  PAXMAN, Richard, G. ,  MARRON, Joseph, C.

IPC: H01L27/00

CPC classification number: G01B11/24

Abstract: A system and method for creating a three-dimensional image (24) of an opaque object (12) utilize frequency diverse coherent illumination (10) in combination with an opacity constraint in performing three-dimensional phase retrieval and/or profile retrieval. An opaque object (12) is one which exhibits only surface scattering and no volume scattering over volumes that extend beyond the desired range resolution. The system and method require only fourier intensity information to create a three-dimensional image (24) which avoids the difficulties associated with prior art systems and methods requiring phase information ot produce similar images. Furthermore, the system and method of the present invention do not require imaging optics, precise alignment of optical components, or precise phase stability of the coherent illumination source.

Abstract translation: 用于创建不透明对象（12）的三维图像（24）的系统和方法在执行三维相位检索和/或轮廓检索时与不透明度约束相结合使用频率不同相干照明（10）。 不透明物体（12）是仅在表面散射且在超过所需范围分辨率的体积上没有体积散射的物体。 该系统和方法仅需要四分之一的强度信息来产生三维图像（24），这避免了与现有技术系统相关的困难和需要生成相似图像的相位信息的方法。 此外，本发明的系统和方法不需要成像光学元件，光学元件的精确对准或相干照明源的精确相位稳定性。