49-622 25.0 x 25.0 mm N-BK7 Precision Protective Flat Window; t=4 mm Uncoated

The 49-622 is a 25.0 x 25.0 mm N-BK7 Precision Protective Flat Window with a thickness of 4 mm, sourced from the reputable optical components vendor, Edmund Optics. This uncoated window is a prime example of a high-quality flat window, designed for precision applications.

The window is fabricated from N-BK7, a popular borosilicate crown glass known for its excellent optical properties. This material is often chosen for its low dispersion and high Abbe number, making it an ideal choice for applications that require high optical performance and minimal chromatic aberration. The N-BK7 Schott designation indicates that the glass used in this window adheres to the strict quality standards set by Schott, a leading glass manufacturer.

The window boasts a thin lens shape, with a width and length of 25.0 mm each. This rectangular base shape ensures a large aperture, allowing for efficient light transmission. The window's thickness of 4 mm provides robust protection for the optical components placed behind it, while maintaining minimal optical path deviation.

Notably, this window is uncoated, meaning it does not have any anti-reflective or other surface coatings. While coatings can enhance the performance of an optical window in specific applications, an uncoated window like this one can be advantageous in situations where environmental factors, such as humidity or temperature fluctuations, could negatively impact coating performance.