BICV209 25.4 mm Dia. x -175 mm FL; Uncoated; Double-Concave Lens

The BICV209 is a high-precision double-concave lens, sourced from WTS Photonics, with a diameter of 25.4 mm and a focal length of -175 mm. This lens is designed for use in applications that require a concave-concave spherical lens with a circular base shape.

The lens's geometry is meticulously crafted, with an edge thickness of 2.89 mm and a center thickness of 2 mm. The effective focal length (EFL) is -175 mm, making it suitable for applications that require a negative focal length. The first radius of curvature (R1) is -181.13 mm, while the second radius of curvature (R2) is 181.13 mm, indicating a symmetrical double-concave design. The back focal length (BFL) is 174.12 mm.

The lens is made from n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low dispersion. This material is widely used in optical systems that require high precision and accuracy. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties. However, it can be customized with various coatings upon request.

This lens is designed to work with a wavelength of 546.1 nm, making it suitable for applications that use this specific wavelength, such as certain types of laser systems. The lens's shape is spherical, which is a common design for optical lenses due to its simplicity and effectiveness.