Looking Back 30, 20, and 10 Years Ago in OPN Medical lasers; ocean optics; infrared imaging Log in or become a member to view the full text of this article. This article may be available for purchase via the search at Optica Publishing Group. Optica Members get the full text of Optics & Photonics News, plus a variety of other member benefits. Publish Date: 01 April 2021 Add a Comment Please enable JavaScript to view the comments powered by Disqus.