LD4735-UV 25.4 mm Dia. UVFS Double-Concave Lens; EFL=-75.3mm 245-400nm

The LD4735-UV is a high-quality spherical lens from Thorlabs, designed with a double-concave structure and a base shape of 25.4 mm diameter. This lens is specifically engineered for use in the ultraviolet (UV) spectrum, with a wavelength of 588 nm, making it ideal for applications that require precise UV light manipulation.

The lens features an effective focal length (EFL) of -75.3 mm, which is a critical specification for optical systems. The negative EFL indicates that this is a diverging lens, meaning it spreads out light rays that pass through it. This can be useful in various applications, such as creating a wider beam of light or reducing the intensity of a light source.

The LD4735-UV is made from UVFS, a unique material with the material ID 1965. This material is specifically designed for use in the UV spectrum, ensuring high transmittance and minimal absorption in this range. The lens is also coated with THo UVFS UV BAR on both the front and back surfaces, which further enhances its performance in the UV spectrum.

The geometry of the lens includes a center thickness of 3.5 mm and inner and outer radii of 0 mm. The radii of 0 mm indicate that the lens is double-concave, meaning both surfaces are curved inward. This design further contributes to the lens's diverging properties.