220-0231E 25.4 mm Dia. N-BK7 Precision Round Window; t=3 mm Uncoated

The 220-0231E is a precision round window, boasting a diameter of 25.4 mm and a thickness of 3 mm. This window is fabricated from N-BK7, a popular glass type from Schott, known for its excellent optical properties and wide transmission range.

The window is of the flat variety, designed for use in applications where minimal optical distortion is required. Its base shape is circular, making it suitable for a wide range of optical systems. The geometry of this window is defined by its diameter and thickness, both of which contribute to its optical performance.

This 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 the natural properties of the glass are desired, or where coatings may interfere with the system's operation.

The window is classified as a thin lens, indicating that its thickness is significantly less than its diameter. This is a common characteristic of windows used in optical systems, as it minimizes optical aberrations and distortions.

The window is designed to operate at a wavelength of 633 nm, making it suitable for a wide range of laser applications. The vendor for this window is EKSMA Optics, a reputable manufacturer of optical components.