LD4797 6 mm Dia. UVFS Double-Concave Lens; EFL=-6mm Uncoated

The LD4797 is a spherical lens from Thorlabs, featuring a unique double-concave design. This lens has a diameter of 6 mm and a center thickness of 2.5 mm, making it a compact and lightweight option for various optical applications. The effective focal length (EFL) of this lens is -6 mm, indicating its diverging nature, which is further emphasized by its curvature radii of -5.9 mm for the first surface and 5.9 mm for the second.

The lens is made of UVFS material, specifically UVFS mal-1965, which is known for its transparency in the ultraviolet spectrum. This makes the LD4797 particularly suitable for applications that involve UV light. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties or protect it from environmental factors. However, uncoated lenses often provide better light transmission for a narrower range of wavelengths.

The lens is designed to operate at a wavelength of 587.6 nm, which is in the yellow-orange part of the visible light spectrum. This could be useful in applications that require precise manipulation of light in this wavelength range.