66-190 40 mm Dia. N-BK7 Ultra-Thin Protective Flat Window; t=0.2 mm Uncoated

The 66-190 is a 40 mm diameter uncoated ultra-thin protective flat window, designed and manufactured by Edmund Optics. This window is made from N-BK7, a popular optical glass known for its excellent optical properties and high damage threshold. The window features a base shape of a circle, making it suitable for a wide range of applications.

The geometry of the window includes a diameter of 40 mm and a thickness of 0.2 mm, making it one of the thinnest protective windows available in the market. This ultra-thin design ensures minimal optical distortion while providing adequate protection to the optical components placed behind it.

The window is uncoated, meaning it does not have any anti-reflective or other coatings applied to its surfaces. This can be advantageous in certain applications where the introduction of a coating might alter the optical properties of the window. However, it is important to note that uncoated windows can have higher reflectivity, which might need to be considered in the overall system design.

The window is designed to operate at a wavelength of 587.6 nm, which falls within the visible spectrum. This makes it suitable for use in applications where visibility and clarity are critical, such as in imaging systems, beam delivery systems, and optical metrology.