OPB-25C05-4-5 25 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=5 mm Uncoated

The OPB-25C05-4-5 is a 25 mm diameter N-BK7 round optical parallel flat window with a thickness of 5 mm, sourced from OptoSigma. This uncoated window is designed for use in optical systems where parallel light transmission is required.

The window is made from N-BK7, a high-quality borosilicate glass known for its excellent optical properties. It has a refractive index of approximately 1.5168 at 588 nm, making it suitable for a wide range of optical applications. The window's circular shape and flat geometry ensure efficient light transmission, while its thin lens shape allows for easy integration into various optical systems.

Notably, this window is uncoated, meaning it does not have any anti-reflective or other surface coatings. This may be desirable in applications where such coatings are not necessary or could interfere with the system's operation. However, it's important to note that uncoated windows can reflect a small percentage of incident light, which could be a consideration in high-precision applications.

The window is currently in stock and available for purchase through the OptoSigma website. Detailed specifications, including dimensional tolerances and surface quality, can be found on the product page linked below.

For more information and to purchase, visit: https://www.optosigma.com/us_en/optical-parallels-bk7-circle-i-10-20-OPB-C.html