Oxford University Innovation Limited

Opsydia Ltd

Martin Booth

Patrick Salter

Travis J Gould

Julian Fells

Lewis Fish

Matthew Ashdale

Joseph Dixon

Ajay Varghese

Simon Henley

John Sanford O'neill

Joerg Bewersdorf

Wei Huang

Ian Thompson

Daniel Burke

Yizhi Song

Bei Li

A liquid crystal device () is provided comprising: a liquid crystal layer having a thickness and comprising: a liquid crystal material; and a plurality of polymer structures () comprising polymerised liquid crystal material. Each polymer structure () is located at a different depth in the thickness of the liquid crystal layer. Electrodes are provided configured to apply an electric field to the liquid crystal layer. Each polymer structure () has a different selected locked-in liquid crystal state.

Liquid crystal for light modulation

Method of laser modifying an optical fibre to form a modified region at a target location within the fibre, comprising positioning at least a portion of an optical fibre in a laser system for modification by a laser, applying a correction to an active optical element of the laser system to modify wavefront properties of the laser to counteract an effect of aberration on laser focus, and laser modifying the optical fibre at the target location using the laser with the corrected wavefront properties to produce the modified region.

Method of laser modification of an optical fibre

A viewing device is configured to magnify and view a marking on a gemstone. The viewing device includes a light source, a mask, a magnifying optical device, and a camera. The light source generates light directed along a first path towards the gemstone. The mask partially obscures the light from the light source to generate a pattern. The partially obscured light is reflected off of the gemstone and magnified by the magnifying optical device. The camera is positioned to capture the magnified light. One or more additional light sources generate light directed along a second path towards the gemstone. The light enters the gemstone through a preferred facet and internally reflects. Internally reflected light scatters off of an internal mark in the gemstone and exits the gemstone through the gemstone's top face. The reflected and scattered light is magnified by the magnifying optical device and captured by the camera.

Gemstone inscription viewing system and applications thereof

Growing community of inventors

Oxford, United Kingdom

Martin Booth