# Barium gallogermanate (BGG) glass

BGG glass, a member of the heavy crown glass family, is distinguished by its high refractive index and moderate optical dispersion. These characteristics make it an appealing choice for specialized optical systems that demand precise control over chromatic aberrations or a specific focal length. Due to its high refractive index, BGG glass enables the design of shorter focal lengths or smaller optical elements, potentially leading to more compact and lightweight optical systems. Commonly found in the catalogs of industry standards like Schott Glass, the BGG classification serves as a shorthand to convey key optical properties of the glass. As such, BGG glass is often employed in high-end camera lenses, scientific instruments, and other applications requiring exceptional optical performance. Its unique attributes make it an invaluable resource for optical designers striving for excellence in imaging and light manipulation.

## Composition

BaO : Ga2O3 : GeO2