3-D Version of a Spade (image) The Optical Society Caption A 3-D version of a spade (left) is first rendered in 2-D from the thermal infrared energy emitted by the object. The different colors represent areas of higher and lower temperature as measured by the sensor. The image on right is the optically reconstructed object. The gray ground plane was added to provide context. Credit Optics Express Usage Restrictions None 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.