“You're not adding stress to make a shape, you're selectively removing stress in specific directions with carefully designed geometric structures, like dots or lines,” says Schattenburg, senior research scientist and director of the Space Nanotechnology Laboratory. And because the optical surface and the coating are adhered together, manipulating the coating material also reshapes the optical surface accordingly. Selectively treating the film coating in different areas controls where stress and tension is applied across the surface. Novel stress patterns are lithographically printed into the film so that researchers can change the properties of the material in specific areas. Substrates for optical surfaces are first coated on the backside with thin layers of high-stress film, made of materials like silicon dioxide. In this new approach, Yao has developed a novel arrangement of stress patterns for precisely controlling general stress. Chalifoux worked with the team on earlier papers to develop a mathematical formalism to connect surface stress states with deformations of thin plates, as part of his doctorate in mechanical engineering. The team’s work builds on the research of Brandon Chalifoux, who is now an assistant professor at the University of Arizona. “Using stress to deform optical or semiconductor surfaces is not new, but by applying modern lithographic technology, we can overcome many of the challenges of existing methods,” says Yao. Yao and the rest of the team imagine that these thinner and more easily deformable surfaces can be useful in broader applications, like augmented reality headsets and larger telescopes that can be sent into space at lower cost. Thin plate shaping is typically used for high-level, complex systems, like deformable mirrors or wafer-flattening processes during semiconductor manufacturing, but this innovation means future production will be more precise, scalable, and cheap. In a paper appearing in the April 20 issue of Optica, Yao, a research scientist and the paper’s lead author, explains their new approach to reshaping thin plate materials in a way that eliminates distortion and enables researchers to bend surfaces more arbitrarily into the precise and complex shapes they might need. ![]() Now, MIT researchers Youwei Yao, Ralf Heilmann, and Mark Schattenburg of the Space Nanotechnology Laboratory (SNL) within MIT’s Kavli Institute for Astrophysics and Space Research, as well as recent graduate Brandon Chalifoux PhD ’19, have devised new methods to work past this barrier. ![]() This is especially true for ultra-lightweight optical systems, such as space optics, where traditional optical fabrication methods struggle to meet exacting shape requirements. For example, the surfaces of mirrors and plates with microstructures that are necessary in these optical systems can be distorted by stressed surface coating materials, degrading optics quality. Link to Instagram Page Displays the Instagram logo and links to the iSpot.Technologies that depend on lightweight, high-precision optical systems, like space telescopes, X-ray mirrors, and display panels, have developed significantly over the past several decades, but more advanced progress has been limited by seemingly simple challenges.Link to LinkedIn Page Displays the LinkedIn logo and links to the page.Link to YouTube Page Displays the YouTube logo and links to the page.Link to Twitter Page Displays the Twitter logo and links to the page.Link to Facebook Page Displays the Facebook logo and links to the page.Get a second set of Skinny Stacks for 50 percent off with a special promo codeĪdd None have been identified for this spot As a special promotional offer, customers can get a second set of Skinny Stacks for 50 percent off with the use of a special promo code. Featuring a unique silicone cover, Skinny Stacks are able to wrap around food tightly to ensure no air gets in to spoil your food. Introducing the Skinny Stacks storage tray, a food storage tray designed to keep food fresh longer while limited wasted space in your refrigerator. ![]() If you are tired of food storage containers that clutter up your fridge and don't keep food fresh properly then George and Mary-Beth have an Incredible Invention for you. Marketing Stack Integrations and Multi-Touch Attribution.Real-Time Ad Measurement Across Linear and CTV.There's a Better Way to Measure TV & Streaming Ad ROI Spend □ TV Impressions □ National Impressions □ Local Impressions □ Comments Unlock These Ad Metrics Now National Airings □ First Airing □ Last Airing □ Creatives □ Recently Aired On □ Est.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |