The camera adopts 2 key features of feline eyes: vertical pupils and the tapetum lucidum, a layer behind the retina that boosts sensitivity.
Scientists have created a new camera that mimics the structure of a cat’s eye to tackle difficulties posed by low light and camouflage. Designed by Min Su Kim and team, the camera enhances the abilities of those used in drones and autonomous vehicles.
“Mimicking the eye structures of cats enhances camera performance in low-light conditions by incorporating features such as the tapetum lucidum and a vertically adjustable pupil. The tapetum lucidum, a reflective layer behind the retina in feline eyes, acts as a photonic crystal with rod-like structures that reflect incoming light back through the retina for a second absorption.“
“First, to replicate the tapetum lucidum, a silver metal reflector is positioned behind the image sensor. This design choice eliminates the wavelength dependence inherent in biological tapetum lucidum, ensuring a more uniform reflection of light across different wavelengths,” Minseok Kim explains.Inspired by the feline eye, Kim and team developed a custom vertical slit aperture and a hemispherical silicon photodetector array with silver reflectors.
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