CONTENTS FEATURES 4 Spectroscopy Using an Optical Microscope 7 Backside Illumination Gets Fast APPLICATION BRIEFS 10 The Hidden Effects of Optical Coating Stress 13 Monitoring Additive Manufacturing with an Optical Microphone TECH BRIEFS 22 New Electron Microscopy Technique Offers First Look at Previously Hidden Processes 23 Engineering the Flow of Light 24 A Sharper Look at the Interior of Semiconductors 26 Say Goodbye to the Dots and Dashes to Enhance Optical Storage Media 26 Standard Digital Camera and AI to Monitor Soil Moisture During the manufacturing of fiber optic cable, precision ball screws drive the delivery of silicon preforms to heating elements for melting, dripping, and eventually hardening into a fine filament that is then pulled onto a takeup spool. To learn more, read the applications brief that begins on page 19. (Image courtesy of Thomson Industries) DEPARTMENTS 28 NEW PRODUCTS ON THE COVER SPECIAL SECTION Technology Leaders in Optics 17 Image Sticking - Cause, Test and Solutions 19 Optimizing 5G Fiber Optic Filament Production 2 Free Info at http://info.hotims.com/79417-724 Cov ToC Photonics & Imaging Technology, September 2021http://info.hotims.com/79417-724 http://www.abpi.net/ntbpdfclicks/l.php?202109TBNAV