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一、引言偏光显微鏡是研究岩石的主要工具,從事於岩石學學習者,必須掌握它。在掌握偏光顯微镜的過程中,首先要了解光線通過晶體時所發生酌情形,此種情形的變化往往因光線的性質而不同,而光線性質則又隨偏光顯微鏡的裝備而有所變化。按一般偏光顯微鏡的裝備,用以研究晶體的光線分为三種:即單偏光,正交偏光與聚斂偏光。正交偏光在應用上較廣泛,共通過非均質晶體情形的了解,亦为學習光性結晶學者的一個關鍵问題。因为它不僅可以说明干涉色
I. INTRODUCTION Polarizing microscopes are the main tools for studying rocks. They must master them if they are engaged in petrology learners. In the process of mastering a polarizing microscope, we must first understand the discrepancy of the light when it passes through the crystal. The change of such a situation often depends on the nature of the light, and the light property changes with the equipment of the polarizing microscope. According to the general polarization microscope equipment, to study the crystal light is divided into three types: the single polarization, orthogonal polarization and convergence polarization. Orthogonal polarization is widely used in a wide range of applications, through the understanding of heterogeneous crystal case, but also for the study of the crystallization of a critical issue scholars. Because it can not only explain the interference color