X-Ray topograph reproducing apparatus

An X-ray topograph reproducing apparatus comprising

• an X-ray supply source which emits two characteristic X-rays K.alpha..sub.1 and K.alpha..sub.2 whose wave lengths are different from each other,
• means for supporting a specimen to be observed and for moving said specimen in such a direction that the distance between the X-ray source and the specimen is kept nearly constant,
• a first slit fixedly arranged between said X-ray supply source and said specimen supporting means, said slit for allowing passage of an incident beam to the specimen which beam is divergent enough for satisfying the Bragg reflection condition for both the K.alpha..sub.1 and K.alpha..sub.2 radiations,
• a second slit fixedly arranged so that both of the characteristic X-rays K.alpha..sub.1 and K.alpha..sub.2 diffracted from said specimen can pass through said second slit,
• an X-ray sensing television camera for receiving said two diffracted characteristic radiations K.alpha..sub.1 and K.alpha..sub.2,
• a detector means mechanically connected to said specimen supporting means and for producing an electric signal indicating the position on the specimen where one of the two characteristic radiations K.alpha..sub.1 and K.alpha..sub.2 satisfies the Bragg condition during the motion of the specimen,
• a gate circuit connected to said X-ray sensing television camera and said detector means, for extracting an image reproducing output signal due to one of the two diffracted radiations K.alpha..sub.1 and K.alpha..sub.2 during the motion of the specimen,
• a charge storage tube connected to both said gate circuit and detector means, for successively storing the image due to said output signal from said gate circuit at positions on the image storage surface in the storage tube corresponding to the detected positions on the specimen, and
• a direct viewing means connected to said charge storage tube, for directly viewing the image stored in said charge storage tube.