# BAK1 optical glass

BAK1 (Borosilicate Crown 1) is a type of optical glass that combines boron and silicate, among other elements, to achieve specific optical properties. This glass type is often used in specialized optical applications that require low dispersion and a high refractive index. BAK1 is known for its good transmission across the visible spectrum and into the near-infrared range, making it suitable for a variety of optical devices like telescopes, binoculars, and certain types of lenses. Its low level of optical aberrations makes it a choice material for high-quality imaging systems. Like other high-quality optical glasses, BAK1 can be expensive and is generally used in applications where its particular optical characteristics offer a noticeable advantage. Overall, BAK1 represents a specialized category of optical glass, designed for applications requiring high performance and specific optical properties.

## BAK1 or similar glasses produced by different makers

Maker | Glass
--- | ---
Schott | N-BAK1
Hikari | E-BAK1
Ohara | S-BAL11
CDGM | H-BAK8