Optical Images Formed by Conical Refraction
Optical Images Formed by Conical Refraction
复制标题
圆锥折射形成的光学图像
DOI：
10.1038/149552b0
复制
发表时间：
1942
期刊：
影响因子：
64.8
通讯作者：
T. M. Nedungadi
中科院分区：
文献类型：
--
作者：
C. Raman;T. M. Nedungadi
近似垂直于单射线速度轴切割的双轴晶片具有形成其前面的照明物体的光学图像的显著特性。这种效应首先是用文石1观察到的，但在最近的笔记2中描述的为锥形折射展示而准备的一盘萘以更引人注目的方式展示了这一效应。随附的复制说明了这一现象。1和3再现保持在晶体前面的物体，而2和4是形成在晶体后面并直接在照相底片上接收的相应图像。所记录的图像在任何情况下都是竖直的，并且是单位放大的。物体和图像到晶面的距离可以独立地从零到大的值变化。
A PLATE of biaxial crystal cut approximately normal to the axis of single-ray velocity has the remarkable property of forming optical images of an illuminated object held in front of it. This effect was first observed with aragonite1 but is exhibited in a much more striking fashion by a plate of naphthalene prepared for the exhibition of conical refraction as described in a recent note2. The accompanying reproduction illustrates this phenomenon. 1 and 3 reproduce objects held in front of the crystal, while 2 and 4 are the corresponding images formed in the rear of the crystal and received directly on a photographic plate. The image recorded is in every case erect and of unit magnification. The distances of the object and of the image from the crystal faces may be independently varied from zero up to large values.