The photophone is a telecommunications device that allows transmission of speech on a beam of light. It was invented jointly by Alexander Graham Bell and his assistant Charles Sumner Tainter on February 19, 1880, at Bell's laboratory at 1325 L Street in Washington, D.C. Both were later to become full associates in the Volta Laboratory Association, created and financed by Bell. On June 3, 1880, Bell's assistant transmitted a wireless voice telephone message from the roof of the Franklin School to the window of Bell's laboratory, some 213 meters (about 700 ft.) away. Bell believed the photophone was his most important invention. Of the 18 patents granted in Bell's name alone, and the 12 he shared with his collaborators, four were for the photophone, which Bell referred to as his "greatest achievement", telling a reporter shortly before his death that the photophone was "the greatest invention [I have] ever made, greater than the telephone". The photophone was a precursor to the fiber
El fotógrafo es un dispositivo de telecomunicaciones que permite la transmisión del habla en un rayo de luz. Fue inventado conjuntamente por Alexander Graham Bell y su asistente Charles Sumner Tainter el 19 de febrero de 1880, en el laboratorio de Bell en 1325 L Street en Washington, D.C. Ambos fueron más tarde para convertirse en socios completos en la Volta Laboratory Association, creado y financiado por Bell. El 3 de junio de 1880, el asistente de Bell transmitió un mensaje de voz inalámbrico desde el techo de la Escuela Franklin a la ventana del laboratorio de Bell, unos 213 metros (alrededor de 700 pies) lejos. Bell creyó que el fotógrafo era su invención más importante. De las 18 patentes concedidas en nombre de Bell solo, y los 12 que compartió con sus colaboradores, cuatro eran para el fotógrafo, que Bell se refirió a su "más grande logro", diciendo a un reportero brevemente que antes de su muerte el fotógrafo "el más grande jamás ha sido hecho en el [