39-274 50 mm Dia. Borofloat33 Protective Flat Window; t=1.1 mm Uncoated

The 39-274 is a 50 mm diameter, 1.1 mm thick uncoated Borofloat33 protective flat window, available from Edmund Optics. This window is designed for general-purpose use and is well-suited for a variety of applications due to its high optical quality and damage resistance.

Borofloat33 is a low-alkali glass with excellent transmittance across the visible spectrum, making it an ideal material for optical windows. It has a high Abbe number, indicating low dispersion, which reduces chromatic aberration in imaging systems. The 1.1 mm thickness provides sufficient strength and rigidity while maintaining a low profile, making it suitable for applications where space is limited.

The window features a flat base shape, ensuring a uniform optical path and minimal distortion. Its circular geometry, with a 50 mm diameter, is versatile and compatible with many optical systems. The uncoated surface allows for broadband transmission but may exhibit higher reflectance compared to coated surfaces.

This window is a thin lens type, meaning it has minimal optical power and will not significantly alter the focus or magnification of an optical system. It is an excellent choice for protecting optical components from environmental hazards, such as dust, moisture, or mechanical damage.