X-ray photography of zero-order reciprocal net planes of a crystal

Summary A method is described for obtaining an image of the zero-order reciprocal net plane without any distortion of the picture. This may be important, as all rays reflected by the crystal travel to the film along paths of equal length. Apart from the fact, that they reach the film at a constant angle, which can be adjusted so as to suit any special demands, the intermediate distances between the reciprocal net points on the photography can also be varied. These features render the method useful for the comparison of intensities. For research work on fibres it may also be of some use.