Picture Paints a Thousand Words: Optical Interference and Langmuir Blodgett Thin Films

Copyright: © 2016 Sharma KR. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. AR. Anti-reflection nanocoatings were discussed as early as 1938. Coating with 102.8 nm thickness was applied to both sides of glass by an associate of Nobel Laureate Irving Langmuir of General Electric. The associate was Katherine B. Blodgett. She used this Nano coating to make glass form being visible (Washington Post 12-27-1938). Pure glass is found to transmit 92% of light. 99% of light was transmitted after Ms. K. B. Blodgett coated the glass. The coated pane could only be viewed using the edges per the news clip ‘Woman Scientist Discovers Coating to Make Glass Invisible’. Clocks dial faces and showcase glasses and window panes cease to be visible. Light is not reflected from any angle. This can be used in eyeglasses to keep wearers to be bothered by light reflection or stray beams from side or behind. Camera lens with 8% less reflection can be prepared. Some cameras with 3-4 of these lenses can be used to achieve a 25-35% light transmission. The chemical formula of the coating is not yet made public and the process was not on the market for commercial sale.