LB1199 N-BK7 Bi-Convex Lens; Dia:2 in; f=200.0 mm Uncoated

The LB1199 N-BK7 Bi-Convex Lens is a high-quality optical component sourced from Thorlabs, a leading vendor in the field of precision photonics. This lens, with a diameter of 2 inches and a focal length of 200.0 mm, is designed for use in a wide range of optical systems, including imaging, beam shaping, and laser applications.

The lens is made from N-BK7, a popular glass type known for its excellent optical properties. This material, also known as BK7, is a borosilicate crown glass with a low refractive index and low dispersion, making it an ideal choice for many optical applications. The N-BK7 designation indicates that this particular lens is made from Schott glass, a renowned manufacturer known for its high-quality optical materials.

The lens features a bi-convex geometry, meaning it has two spherical surfaces that are both convex, or outwardly curved. This shape is often used to collimate or focus light, making it a versatile choice for many optical systems. The lens has an effective focal length (EFL) of 200.0 mm, which is the distance from the lens at which a collimated beam of light will come to a focus.

The lens has a diameter of 50.8 mm (2 inches) and a thickness of 3 mm at the edge, increasing to 6.2 mm at the center. The inner and outer radii are 0 mm, indicating that the lens surfaces are parallel. The back focal length (BFL) of the lens is 198 mm.

This lens is uncoated, meaning it does not have any anti-reflective coatings applied to its surfaces. While coatings can be beneficial in reducing unwanted reflections and increasing transmission, an uncoated lens can be a cost-effective choice for applications where such features are not required.

The LB1199 N-BK7 Bi-Convex Lens is currently in stock, according to the vendor's website. For more information, including detailed specifications and purchasing options, please refer to the vendor's webpage.