Optic Device Mimics Human Retina

Why do we feed artificial intelligence data like a normal computer if it can think like a human brain? Scientists are addressing this question by considering the sensory input we humans receive and have developed an optic device inspired by how the human eye works. Researchers recently published the results of their optical sensor, which could significantly improve the efficiency of robotic components.

The optic device adapts its signals as it senses different light intensities using ultrathin layers of photosensitive perovskite material commonly used in solar cells. Perovskites are chemical materials made up of metal atoms with positive charges and oxygen or halide anions with negative charges that layer to form an intriguing lattice.

The charged lattice structure gives perovskites their distinct properties, as atomic-level changes in the structure can alter their electrical behavior. These properties make perovskites excellent semiconductors, capable of switching from insulating to conducting electricity.

Unlike solar cells, the optic device responds to changes in illumination rather than storing and using the light provided as energy. These new’retinomorphic’ sensors use light changes to send signals to process the image in front of them.

Photoreceptors in our eyes are sensitive to changes in light but less responsive to constant illumination. The researcher then began to sketch potential devices to mimic the processing behavior of these photoreceptors in our eyes.

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