BICC-25.0/26.1UV 25.0 mm Dia. x -25 mm FL; Uncoated; Double-Concave Lens

This is a double-concave lens, also known as a biconcave lens, sourced from the renowned optical components manufacturer, Laser Components. The lens is specifically designed for use with a wavelength of 248 nanometers.

The lens features a base shape of a circle, with a diameter of 25 millimeters. The thickness at the edge of the lens is 8.4 millimeters, while the center thickness is 2 millimeters. The effective focal length (EFL) of the lens is -25 millimeters, indicating that it is a diverging lens, causing incoming light rays to spread out after passing through it.

The lens is made from fused silica, specifically identified as "fused sil mal-1965" in the material data. This material is known for its excellent optical properties, making it suitable for a wide range of applications.

Notably, this lens is uncoated. While coatings can enhance the performance of lenses in various ways, such as reducing reflection or increasing transmission, an uncoated lens can be advantageous in certain situations. For instance, it may be more cost-effective or suitable for applications where specific coatings could interfere with the desired optical effects.

The lens's geometry includes inner and outer radii of 0 millimeters, with radii of curvature of -26.1 millimeters for the first surface and 26.1 millimeters for the second surface. This specific curvature contributes to the lens's diverging properties.

According to the vendor, this item is currently in stock and the associated datasheet is available for reference.