OPB-20S03-10-5 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated

The OPB-20S03-10-5 is a high-quality optical window from OptoSigma, designed with precision for various applications. This window is rectangular in shape, with dimensions of 20 x 20 mm, making it suitable for use in systems where a larger aperture is required. The window has a thickness of 3 mm, providing sufficient structural integrity while maintaining a low profile.

The window is made from N-BK7, a popular glass type in the optical industry due to its excellent optical properties. N-BK7, also known as BK7, is a borosilicate crown glass with a low refractive index and low dispersion, making it an ideal choice for a wide range of applications. This particular window is uncoated, meaning it does not have any additional layers applied to its surface to alter its optical properties.

The window is designed to be a flat window, which means it has parallel surfaces. This is crucial in applications where maintaining a consistent beam path is essential. The window's flatness ensures that light passing through it does not deviate from its original path, preserving the quality of the beam.

According to the provided data, the window is designed for a wavelength of 588 nm. This makes it suitable for applications that operate within this wavelength range, such as certain types of lasers or light-based measurement systems.