Title: Light-Figure Microscope Newly Designed and Its Crystallographic Application to Metal Specimens
Abstract: Light-figure microscope has been newly devised for the rapid, accurate and perfect orientation determination of crystal grains of microscopic size. This microscope consists of two main parts: one is an optical system which produces a clear-cut light figure in the viewing field of the microscope and the other a goniometric mechanism which measures the orientation angles. Full accounts are given of the construction of the microscope, its principle and the procedure and accuracy of the orientation determination with actual examples. It can be applied to large single crystals as well as to crystal grains of the smallest diameter of 15μ with an accuracy well within ±0.2°∼0.5°. It can also serve as a usual metallurgical microscope.