66-311 30 mm Dia. L-BAL35 Precision Aspheric Lens; EFL=22.5mm; NA=0.66 Uncoated

The 66-311 is a high-precision aspheric lens, designed and manufactured by Edmund Optics. This lens, with a catalog number 66-311, is a part of their extensive catalog, available for purchase on their official website. The weblink provided is valid and indicates that the product is currently in stock.

The lens is designed with a base shape of a circle, featuring a diameter of 30 mm. It is made from L-BAL35, a material ID from Ohara, a renowned manufacturer of optical glass. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties or protect it from environmental factors.

The lens is designed to work with a wavelength of 587.6 nm. It has an effective focal length (EFL) of 22.5 mm, which is the distance from the lens's principal point to the focal point when the lens is focused at infinity. The lens's numerical aperture (NA) is 0.66, which indicates its light-gathering capability and resolution.

The lens's geometry is intricately designed. It has an inner radius of 0 mm and an outer radius of 0 mm. The thickness at the edge is 4.57 mm, and the thickness at the center is 14.4 mm. The first radius of curvature (r1) is 13.62 mm, and the second radius of curvature (r2) is 300 mm. The back focal length (BFL) is 13.73 mm.

The lens's shape is aspheric, which means it has a surface profile that deviates from a simple sphere. This design allows for improved optical performance, particularly in terms of reducing spherical aberration. The lens does not have any coatings, as indicated in the 'coating' parameter.