66-313 40 mm Dia. L-BAL35 Precision Aspheric Lens; EFL=30mm; NA=0.66 Uncoated

The 66-313 is a high-precision aspheric lens, designed and manufactured by Edmund Optics. This lens, with a catalog number 66-313, is a part of their extensive catalog, available for purchase on their official website. The weblink provided is valid and indicates that the lens is currently in stock.

The lens is made of L-BAL35, a material identified by the ID 'l-bal35 ohara'. This material is specifically designed for optical applications, ensuring high transparency and durability. The lens has a base shape of a circle, with a diameter of 40 mm, making it suitable for a wide range of optical systems.

The lens has an effective focal length (EFL) of 30 mm, which is a crucial parameter in lens selection. The numerical aperture (NA) of the lens is 0.66, indicating a high light-gathering capability. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties.

The lens's geometry is carefully designed to optimize its performance. It has an inner radius of 0 mm and an outer radius of 0 mm. The thickness at the edge is 2.56 mm, and the thickness at the center is 15.5 mm. The back focal length (BFL) is 20.6 mm.

The lens's shape is aspheric, which means it has a non-spherical surface. This design helps to reduce spherical aberration, a common issue in optical systems. The lens's shape is defined by its radii (r1 and r2), which are 18.22 mm and 400 mm, respectively.