OPTICAL DIFFRACTOMETRY OF A PICTURE APPEARING ON LIQUID-CRYSTAL TV AND ITS APPLICATION TO HIGH-RESOLUTION TRANSMISSION ELECTRON-MICROSCOPY

Diffractogram or Fourier image is obtained from a picture on a liquid crystal TV display by light optical diffraction. As an application of this method, images of an amorphous film which are captured with an el ectron microscopy TV camera are transformed and their diffractograms a re displayed on a monitor TV. This is powerful for the correction of t he tilt of the beam axis and the stigmation of the objective lens in a routine operation of a high-resolution transmission electron microsco pe. This method is applicable to continuous and simultaneous observati on of diffractogram of a moving object.