Sensors can read high-tech banknotes

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Mitsubishi Electric Corp said Tuesday it will launch contact image sensors in late May that enable automated teller machines and other financial terminals to detect a special luminous ink used in banknotes.

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The new sensors, the world’s first, are capable of reading special ink on banknotes that reacts to ultraviolet rays. The ink was introduced recently as a measure against counterfeiting, according to Mitsubishi Electric.

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Until now, there have been no optical sensors that could respond to the luminous ink because ultraviolet radiation causes damage to conventional materials for sensors. ATMs and vending machines have therefore had difficulty reading the high-tech banknotes.

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Mitsubishi Electric’s new sensors are made of highly durable materials in order to endure long periods of ultraviolet radiation exposure, according to the company.

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