A new, dual-polarity lens made of metamaterials offers extra flexibility for focusing and imaging devices and may find application in integrated nano-optoelectronics.
Fourier incoherent single-channel holography can record spatially incoherent digital holograms, avoiding the twin-image problem. This could enable the development of instruments such as holographic telescopes and video cameras.
A new projection method using laser diodes, optical fibers, and liquid crystal phase modulators can produce color, high-quality, high-contrast images with a handheld device and without photon loss.