66-309 20 mm Dia. L-BAL35 Precision Aspheric Lens; EFL=15mm; NA=0.66 Uncoated

The 66-309 is a high-precision aspheric lens offered by Edmund Optics. This lens, with a catalog number 66-309, is made from L-BAL35 material, a product of Ohara. The lens is uncoated, which is a common choice for applications where the coating might interfere with the desired optical properties.

The lens has a base shape of a circle and a diameter of 20 mm. The edge thickness of the lens is 3.05 mm, and it has an effective focal length (EFL) of 15 mm. The lens's first radius of curvature (R1) is 9.08 mm, and the second radius (R2) is 200 mm. The back focal length (BFL) of the lens is 9.16 mm.

The lens's center thickness is 9.6 mm, and it has a numerical aperture (NA) of 0.66. The lens's shape is aspheric, which is ideal for applications requiring high-quality imaging or light collection over a wide field of view. The lens is designed to operate at a wavelength of 587.6 nm.

The lens's geometry is precisely controlled, with no inner or outer radii. The front and back surfaces of the lens are flat, with no curvature. The lens is in stock and available for immediate purchase from the Edmund Optics website.