Perfect Dia:0.5 in N-BK7 Bi-Convex Lens; EFL=20.0 mm Perfect Transmission

This is a Perfect Dia:0.5 lens, a high-quality optical component sourced from the renowned vendor 3DOptix. The lens is a bi-convex spherical lens, meaning it has two convex surfaces. This design is often used to spread light evenly over a wide area, making it ideal for applications such as beam expansion, collimation, and imaging.

The lens has a diameter of 12.7 millimeters and a thickness at the edge of 1.8 millimeters. The center thickness is 3.9 millimeters, providing structural integrity and minimizing optical distortion. The effective focal length (EFL) of this lens is 20.0 millimeters, a common choice for many optical systems due to its versatility.

The lens is made from N-BK7, a type of glass known for its excellent optical properties. This material, also known as Schott glass, has a high refractive index and low dispersion, making it suitable for a wide range of applications, including laser systems, imaging systems, and metrology.

The lens features perfect transmission coating on both the front and back surfaces. This coating enhances the lens's light transmission capabilities, ensuring minimal loss of light due to reflection. It also provides protection against environmental factors, extending the lens's lifespan and maintaining its performance over time.