OPB-20C03-10-5 20 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=3 mm Uncoated

The OPB-20C03-10-5 is a high-quality optical window offered by OptoSigma, a leading vendor in the optical industry. This particular model features a base shape of a circle with a diameter of 20 mm and a thickness of 3 mm, making it a versatile component for various optical applications.

The window is made from N-BK7, a type of borosilicate glass known for its excellent optical properties. This material, also known as BK7, is often used in high-precision optical systems due to its low dispersion and high Abbe number. The specific type of N-BK7 used in this window is sourced from Schott, a renowned glass manufacturer, ensuring a high level of quality and reliability.

The window is designed for use at a wavelength of 588 nm, although it can be used across a broader spectrum depending on the specific requirements of the application. The window is uncoated, meaning it does not have any additional layers applied to modify its optical properties. This can be beneficial in applications where the natural properties of the glass are desired, or where additional coatings could interfere with the system's performance.

The window is classified as a flat window, indicating that its surfaces are parallel to each other. This is crucial in applications where maintaining a consistent optical path is essential. The window's thin lens shape further enhances its functionality, making it suitable for use in compact optical systems.