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Ming-Kwei Lee and a team of researchers from the National Sun Yat-Sen University in Taiwan, Republic of China has fabricated a Fresnel microlens onto the sapphire substrate of a blue LED.The researchers say that adding a Fresnel microlens enhances the optical power of the LED by around 1.68 times at an injection current of 20mA.

A team of researchers from the National Sun Yat-Sen University in Taiwan, Republic of China has fabricated a Fresnel microlens onto the sapphire substrate of a blue LED.

The researchers say that adding a Fresnel microlens enhances the optical power of the LED by around 1.68 times at an injection current of 20 mA.

Image Credit: Ming-Kwei Lee

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