Abstract
An apparatus for producing an image of light figure on a television has been designed and applied for the orientation determination of metal crystals. The apparatus consists of two main parts: one is a light-figure microscope which is provided with an optical system for producing an optical image of light figure and a goniometric mechanism for measuring the orientation angles by the light figure, and the other a television system which converts the optical image into the electrical signal and displays the light figure on the television. Full accounts are given of the construction of the apparatus and the procedure and accuracy of the orientation determination with some examples. It is shown that a clear-cut light figure can be observed on a television and the orientation work can be conducted without a dark-room. The accuracy of the determination of crystal orientations is well within 0.017 rad (1°).
