66-323 40 mm Dia. L-BAL35 Precision Aspheric Lens; EFL=30mm; NA=0.66 BBAR 425-675nm

The 66-323 is a high-precision aspheric lens offered by Edmund Optics, featuring a 40 mm diameter and a numerical aperture of 0.66. This lens is designed for use in the visible spectrum, with a wavelength of 587.6 nm.

The lens is made from L-BAL35, a material from Ohara, which is known for its excellent optical properties. The aspheric design of the lens helps to reduce spherical aberration, providing sharper images than spherical lenses.

The lens has an effective focal length of 30 mm and a back focal length of 20.6 mm. The thickness at the edge of the lens is 2.56 mm, while the thickness at the center is 15.5 mm. The lens has a k1 value of -0.632215, which is a measure of the degree of asphericity.

The lens is coated with BBAR (Broadband Anti-Reflection) coating, which reduces reflection and increases transmission in the 425-675 nm range. This coating helps to improve the contrast and clarity of the images produced by the lens.

The 66-323 is a versatile lens that can be used in a wide range of applications, including imaging, beam shaping, and laser applications. Its high numerical aperture and aspheric design make it an excellent choice for applications that require high resolution and low distortion.