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…
| 单词 | θ64845 |
| 释义 | the world > physical sensation > sight and vision > optical instruments > instruments for observing > [noun] > scanning devices > to enable blind person to read (2) optophone1913 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… Optacon1970 A device for enabling a blind person to recognize printed characters by touch, the fingertip being placed on an array of numerous tiny rods certain… |
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