OPB-30C03-4-5 30 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=3 mm Uncoated

The OPB-30C03-4-5 is a 30 mm diameter N-BK7 round optical parallel flat window with a thickness of 3 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 flat geometry ensures that light passing through it remains parallel, making it ideal for use in beam delivery systems, interferometers, and other applications where maintaining the integrity of the light path is crucial.

The window's thin lens shape further enhances its optical performance, minimizing optical aberrations and distortions. Despite its thin profile, the window is robust and durable, capable of withstanding the rigors of regular use in a variety of environments.

The window is uncoated, meaning it does not have any anti-reflective or other coatings applied to its surfaces. This can be advantageous in certain applications where a high level of reflectivity is desired, or where the introduction of a coating could potentially degrade the window's optical performance. However, in applications where minimizing reflectivity is important, an anti-reflective coating may be applied to the window.