公开(公告)号：US20100284083A1

公开(公告)日：2010-11-11

申请号：US12308507

申请日：2007-06-14

申请人： Cédric Buchon ,  Renaud Molition ,  Cécile Bonafos

发明人： Cédric Buchon ,  Renaud Molition ,  Cécile Bonafos

IPC分类号： G02B5/18

CPC分类号： G02B27/0172 ,  G02B5/1847 ,  G02B27/0018 ,  G02B27/0037 ,  G02B27/4211 ,  G02B2027/0116 ,  G02B2027/0174

摘要： A light pipe for transmitting light signals from one of its ends, referred to as its inlet surface (1A), to its other end, referred to as its outlet surface (1B), facing towards the eye (3) of a user for viewing a virtual image, includes a diffractive component formed directly in the inlet surface (1A), the diffractive component being an element satisfying the equation of an aspherical component of revolution of the “kinoform” type. The diffractive component of the pipe has power situated in a range D(Thresh,X) defined by: D(Thresh,X)=DOPTDIF(Thresh)INTERSECTION DXT(X) where the range DTXT(X) corresponds to the range (ΔP) of diffractive power values of said component for which the value of the overall transverse chromatic aberration is below an acceptable transverse chromatic aberration threshold X; and where DOPTDIF(Thresh) is a power range determined as a function of a diffraction efficiency, written “Thresh”, corresponding to an acceptable value for 1/Rk, for given fabrication tooling, Rk being the ratio between the peak value of the intensity of the point image of the diffraction order k under consideration, and the peak value of the intensity of the point image of the design diffraction order.

摘要翻译： 被称为其入口表面（1A）的其一端（其被称为其入口表面（1A））的光信号的光管被称为其出口表面（1B），其面向用户的眼睛（3）以用于观察 虚拟图像包括直接形成在入口表面（1A）中的衍射部件，该衍射部件是满足“kinoform”类型的非球面旋转分量的方程式的元件。 管道的衍射部件具有位于由D（Thresh，X）= DOPTDIF（Thresh）INTERSECTION DXT（X）定义的范围D（Thresh，X）中的功率，其中范围DTXT（X）对应于范围（＆Dgr ; P）所述分量的衍射功率值，其中全横向色像差的值低于可接受的横向色差阈值X; 并且其中DOPTDIF（Thresh）是作为衍射效率的函数确定的功率范围，对于给定的制造工具，写入对应于1 / Rk的可接受值的“Thresh”，R k是强度的峰值之间的比率 考虑衍射级k的点图像，以及设计衍射级的点图像的强度的峰值。