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OSA | Living History

Katharine Burr Blodgett invented “invisible” or nonreflecting glass.


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)