Additionally, to thoroughly eliminate ghosting and lens flares, reflectivity was kept to half of the previous value at a wavelength of 450 to 650 nm, thanks to the lens surface treated with the Olympus-original ZERO (ZUIKO Extra-low Reflection Optical) coating.

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They are then mixed together to create a grey powder that floats in alcohol over the surface of the lens.

ECONOMIST: Microelectronics

The output is then relayed into a 1.4 mm thick plastic waveguide lens with input and output hologram structures on the surface which squeezes the light down the waveguide and then two dimensionally expands the image back into the user's eye, creating an image that is then mixed into the real world.

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CDM's imaging system, it passes first through conventional optical elements, and then through a lens moulded into a shape of a cubic-like function (ie, with a surface which, instead of being spherical, is relatively flat in the centre but has scalloped edges).

ECONOMIST: MONITOR

Brushing the surface of rocks with Curiosity's dust removal tool first enables the arm-held hand lens camera and X-ray spectrometer, in particular, to see features that might otherwise be obstructed.

BBC: Curiosity Mars rover deploys its rock brush