Due to the longer focal length, telephoto lenses are inherently bigger and heavier ... to the 17th century – was in astronomical telescopes because the folded optical path enabled significant ...

Our research interests include extending the depth of field of imaging systems, increasing image resolution beyond Rayleigh's resolution criterion, and quantifying the optical path length ...

For this, it’s crucial to understand the behavior of light within the optical fiber. The path taken by light inside the fiber is termed a “mode.” Each mode represents a unique trajectory.

Optical phase measurements – which can be used to measure distance, position, displacement, acceleration, and optical path length – are of particular interest. Quantum entanglement enables higher ...