The curvature measurement of the human eyeball

Retina-inspired flexible photosensitive arrays based on selective photothermal conversion

“…in which the electrical response matrix is the product of the photosensitive coefficient matrix (P) and N 0 matrix. As a result, the light signals based on N 0 could be calculated by inversing matrix P as eqn (5), and the difference in the absorption of nanoparticles actually ensures the existence of an inverse matrix. The specific values of the matrices P and P À1 are provided in eqn (S1) and (S2) (ESI †).…”

“…Moreover, these photoreceptor cells are distributed on a curved surface, which strictly matches the curved image field of the crystalline lens and avoids the generation of optical aberrations. 5 Compared to the retina, current artificial imaging arrays, which are mainly based on photoelectric conversion and could sense the photons with energy higher than the band gap, lack the ability of selective absorption toward light and only respond to brightness like rod cells. 6 As a result, the color distinction in such arrays requires extra spectroscopic systems or filters.…”

“…Moreover, these photoreceptor cells are distributed on a curved surface, which strictly matches the curved image field of the crystalline lens and avoids the generation of optical aberrations. 5…”