A microscope image shows the true scale of the device (image) University of Nottingham Share Print E-Mail Caption The optical fibre imaging sensor has a diameter of 125 micrometres, approximately the size a human hair, shown for perspective against a penny. A microscope image shows the true scale of the device, and its ability to conduct light. Credit Dr Salvatore La Cavera Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.