SLSQ-40B-70N 40.0 mm Dia. x -69.7 mm FL; Double-Concave Lens Uncoated

The SLSQ-40B-70N is a high-quality, double-concave lens offered by OptoSigma, a leading vendor in the optical industry. This lens, designed for use in a wide range of optical applications, boasts a 40.0 mm diameter and a focal length of -69.7 mm, making it a versatile choice for many setups.

The lens is crafted from fused silica, a material known for its excellent optical properties, including a low coefficient of thermal expansion and high transmission across a broad spectrum. This particular lens is uncoated, offering users the flexibility to apply their own coatings to suit their specific application needs.

The geometry of the lens is characterized by its concave-concave shape, with an edge thickness of 8.4 mm and a center thickness of 2 mm. The inner and outer radii are both 0, indicating a symmetrical design. The back focal length of the lens is -70.3 mm.

This lens is designed to work with a wavelength of 546.1 nm, making it suitable for a wide range of applications. Its spherical design ensures excellent image quality, making it a reliable choice for various optical systems.