45-639 20 mm Dia. B270 Glass Protective Flat Window; t=2 mm Uncoated

The 45-639 is a 20 mm diameter uncoated B270 window, a high-quality optical component designed for protective applications. Manufactured by Edmund Optics, this window boasts a thin lens shape and a 2 mm thickness, making it an ideal choice for various optical systems.

The window's base shape is circular, providing a uniform and consistent surface for interaction with other optical components. The B270 glass material, sourced from Schott, ensures excellent optical performance and durability. This material is particularly known for its low auto-fluorescence and high damage threshold, making it suitable for use in laser applications.

The 45-639 window is designed to operate at a wavelength of 587.6 nm, although its performance is not limited to this wavelength. Its uncoated surface ensures minimal reflection and dispersion, allowing for efficient light transmission. However, for applications requiring specific reflection or transmission characteristics, various coatings can be applied.