Abstract: There is disclosed a blind person guide device comprising a walking stick, a source mounted on a front face of the walking stick for emitting a beam of infrared radiation in a forward direction, a photoelectric element mounted on the front face of the walking stick for receiving infrared radiation reflected from an object irradiated by the beam, an electric circuit for producing information as to a distance to the object based on the illuminance or energy of received radiation on the photoelectric element, an oscillator for generating electric vibrations having a frequency and an amplitude which are dependent on the distance information produced by the electric circuit, and a vibrator vibratable in response to the electric vibrations and having a vibrating surface against which a human skin can be pressed.

Abstract: Blind guide device is disclosed. The device comprises a light-emitting element, a first electric circuit for generating an electric pulse and causing pulsating-conduction of the light-emitting element, a first lens for converging the light emitted from the light-emitting element onto a body to be detected, a mark attached to the body to be detected for performing retroreflection action, a second lens and a photo-detector element for receiving the light reflected by the body to be detected and the mark, a second electric circuit for amplifying the output electric signal of the photo-detector element and holding an electric signal synchronized with the electric pulse, a third electric circuit for generating an electric signal whose frequency or amplitude varies in response to the output electric signal of the second electric circuit, and an electro-acoustic transducer or vibrator for converting the output electric signal of the third electric circuit into a sound or into a stimulation.