OPB-15S03-20-2 15 x 15 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated

The OPB-15S03-20-2 is a high-quality optical window from OptoSigma, designed to provide excellent performance in a variety of optical systems. This window is rectangular in shape, with dimensions of 15 x 15 mm, and has a thickness of 3 mm, making it suitable for use in applications where a thin, yet robust optical element is required.

The window is made from N-BK7, a type of borosilicate glass that is known for its excellent optical properties. This material has a refractive index of 1.5168 at a wavelength of 588 nm, making it an ideal choice for use in visible light applications. The N-BK7 Schott designation indicates that this glass meets the stringent quality standards set by Schott, a leading manufacturer of optical glass.

The window is uncoated, meaning that it does not have any anti-reflective or other coatings applied to its surfaces. This can be beneficial in applications where such coatings are not required, as it reduces the complexity and cost of the optical system. However, it should be noted that uncoated windows can exhibit higher levels of reflection, which may need to be taken into account in the design of the optical system.

The window is classified as a flat window, meaning that its surfaces are parallel to each other. This is an important characteristic for optical windows, as it ensures that the light passing through the window is not distorted or refracted. The flatness of the window is ensured by the use of precise manufacturing techniques, which guarantee that the window meets the required flatness specifications.