Shack–Hartmann sensor: An instrument that divides an incoming wavefront into multiple subapertures to analyse local tilts and reconstruct the overall phase.

In this letter, we report a weighted modal wavefront control method for surmounting the problems of sub-aperture spot missing in Shack-Hartmann wavefront sensors (SHWFS) and the resultant unstable ...

A real-time VLSI optical centroid processor has been developed as part of a larger Shack-Hartmann wavefront sensor system for applications in adaptive optics. The implementation of the optical ...

Computer Science. Read all the latest developments in the computer sciences including articles on new software, hardware and systems.

Our TV reviewers detail the top-scoring OLED TVs they would personally recommend for every budget and type of viewer.

Between OLED and QLED, which TV technology is the best? We compare brightness, contrast, color and more to settle things once and for all.

OLED TVs are the pinnacle of TV technology and a huge upgrade compared to old LED-LCD TVs. Ready to embrace the future? Here are the best OLED TVs we've tested in 2025.

We demonstrate efficient light extraction from the active region of bottom-emitting organic light emitting devices (OLEDs) using a high refractive index, nondiffractive hemispherical microlens array ...

The best OLED TVs reviewed at home, plus expert advice on how to choose We tried and tested this year’s best OLED TVs, including LG, Sony and Samsung. Which TV is best?