49-630 35.0 x 35.0 mm N-BK7 Precision Protective Flat Window; t=3 mm VIS 0 425-675nm

This 49-630 optical window, sourced from Edmund Optics, is a high-precision protective flat window designed for use in the visible light spectrum. The window measures 35.0 x 35.0 mm with a thickness of 3 mm, making it suitable for a wide range of optical applications.

The window is made from N-BK7 glass, a popular choice in the optical industry due to its excellent optical properties and high damage threshold. This material is known for its low coefficient of thermal expansion, making it resistant to thermal shock and suitable for use in environments with varying temperatures.

The window features a standard anti-reflection coating on both the front and back surfaces, specifically the EDMM Vis-0 coating. This coating is designed to minimize reflection and increase transmission in the visible light spectrum, specifically between 425 and 675 nm. This makes the window ideal for use in applications where maximum light transmission is required, such as in imaging systems, beam delivery systems, and laser applications.

The window is shaped as a thin lens, which is a type of lens where the thickness is much less than the radius of curvature. This shape allows for minimal optical aberration and distortion, further enhancing the window's performance in optical systems.