An instrument designed to enable a blind person to read, in which a photoelectric cell is used to scan a text and produce electric signals that are converted into audible ones corresponding to the different characters.
Origin
Early 20th century. From opto- + -phone, after German Optophon.
Definition of optophone in US English:
optophone
nounˈɒptəfəʊn
An instrument designed to enable a blind person to read, in which a photoelectric cell is used to scan a text and produce electric signals that are converted into audible ones corresponding to the different characters.
Origin
Early 20th century. From opto- + -phone, after German Optophon.