OSA | Living History

Katharine Burr Blodgett invented “invisible” or nonreflecting glass.

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Katharine Burr Blodgett

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)