[Reading device for the blind based on the transformation of the optical image into a vibrotactile one].

The article describes a device in which the printed text letters after their photo-transforming are presented as a matrix of bimorphous piezoelements in the vibrotactile form. The operation of a bimorph as an element of a tactile matrix has been studied experimentally and requirements to parameters of excitation signals were settled. Consideration is given to the phototactile transformation principle and to some circuits for its practical embodiment.