| 摘要 |
A read only memory wherein an array of light emitting elements and an array of light sensing elements are positioned on opposite sides of an optical mask is disclosed. The mask is selectively provided with bit value defining light transmissive and non-transmissive portions at the intersection points of the light transmission paths as defined by the arrays and the mask. Individual emitting array and sensing array components are selectively energized and sensed respectively to determine the bit values defined by the mask.
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