Katharine Burr Blodgett’s research with Irving Langmuir at General Electric led to new ways to deposit coatings on glass and metal to any desired thickness.
She patented a color gauge to measure the thickness of these films. Her measurements revealed the exact thickness needed to cancel reflections from a glass surface and led to her discovery of “invisible” glass. Her work increased the efficiency of lens systems used in aerial cameras and submarine periscopes during World War II. (Photo: Smithsonian)
(Courtesy of Smithsonian)