47-728 15 mm Dia. L-BAL35 Precision Aspheric Lens; EFL=22.5mm; NA=0.33 Uncoated

The 47-728 is a high-precision aspheric lens offered by Edmund Optics. This lens, with a catalog number 47-728, is made from L-BAL35 material, a product of Ohara. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties.

The lens has a base shape of a circle and a diameter of 15 mm. The edge thickness of the lens is 1.8 mm, and it has an effective focal length (EFL) of 22.5 mm. The numerical aperture (NA) of the lens is 0.33, indicating a wide acceptance angle and high light-gathering capability.

The lens's geometry is defined by its inner and outer radii, both of which are 0 mm. The back focal length (BFL) is 19.98 mm, and the center thickness is 4 mm. The lens's shape is aspheric, meaning it has a non-spherical surface to correct optical aberrations and improve image quality.

The lens's conic constant (k1) is -2.364143, and its NA is 0.33. The front diameter (d front) is 0 mm, and the front edge thickness (e front) is 9.56e-05 mm. The front sagitta (f front) is -2.61e-07 mm, the front curvature (g front) is 1.12e-09 mm, and the front conic constant (h front) is -3e-12 mm. The lens's aspheric coefficients (j front and l front) are both 0 mm.

This lens is available for purchase from the Edmund Optics website, and the link provided is valid and indicates that the lens is in stock.