Blind guide device

Details Blind guide device Blind guide device

1985-04-30

1987-03-10

Hix, L. T.

Optics: measuring and testing

Range or remote distance finding

With photodetection

135DIG11, 340600, 34087029, G01C 308

Patent

active

046487107

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.

REFERENCES:
patent: 3546467 (1970-12-01), Benjamin, Jr. et al.
patent: 3661459 (1972-05-01), Aoki

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