Flint Glass

Flint glass is combination of silicon dioxide (SiO2) with lead or potassium. It creates a relatively high refractive index and high degree of light dispersing power compared to other types of glass. Flint glasses are arbitrarily defined as having an Abbe number of 50 to 55 or less. Flint glasses have refractive indices ranging between 1.45 and 2.00.As a result, this blend of glass is characterized by its brilliance and luminosity. This property makes flint glass especially desirable in the production of lenses, optical instruments, and prisms. In modern flint glass, lead oxides are replaced with other metal oxides such as titanium dioxide and zirconium dioxide without significantly altering the optical properties of the glass. 

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American Owned & Operated

Esco Optics is a leading manufacturer of custom and catalog optics, precision optical components, and ITAR optics in the United States.

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As the leader for military and defense optics in the United States, Esco Optics adheres to the International Traffic in Arms Regulations.

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ITAR registered and compliant, Esco manufactures ITAR optics for all of its customers with the strictest confidentiality.