LB1945 N-BK7 Bi-Convex Lens; Dia:1 in; f=200.0 mm Uncoated

The LB1945 N-BK7 Bi-Convex Lens is a high-quality optical component sourced from Thorlabs, a leading global vendor in the field of optics and photonics. This lens, with a diameter of 1 inch and a focal length of 200.0 mm, is designed for use in a wide range of optical systems and applications.

The lens is made of N-BK7, a type of borosilicate glass known for its excellent optical properties. This material is characterized by a high refractive index and low dispersion, making it an ideal choice for applications that require high-precision imaging or light manipulation. The N-BK7 designation indicates that this lens is made from Schott glass, a renowned brand known for its consistent quality and performance.

The LB1945 features a bi-convex geometry, meaning it has a convex shape on both sides. This design provides a large field of view and low spherical aberration, making it suitable for use in imaging systems, beam shaping, and other applications where high optical quality is required.

The lens has a diameter of 25.4 mm and a thickness of 2 mm at the edge, with a center thickness of 2.8 mm. The effective focal length (EFL) is 200.0 mm, and the back focal length (BFL) is 199.1 mm. The radii of curvature for the first and second surfaces are 205.6 mm and -205.6 mm, respectively.

This lens is uncoated, meaning it does not have any anti-reflective or other surface treatments. While this may result in higher reflective losses, it also means that the lens is more robust and less susceptible to damage from environmental factors.