BICV305 38 mm Dia. x -200 mm FL; Uncoated; Double-Concave Lens

The BICV305 is a high-precision double-concave lens, 38 mm in diameter and featuring a focal length of -200 mm. This lens is sourced from WTS Photonics, a reputable vendor known for their quality optical elements. The lens is uncoated, offering a bare, unaltered glass surface that is suitable for specific applications where coating may not be necessary or desirable.

The lens is designed with a base shape of a circle and has a spherical geometry. The center thickness measures 3 mm, while the edge thickness is 4.75 mm, providing a robust structure that can withstand handling and mounting. The effective focal length (EFL) is -200 mm, indicating that it is a diverging lens, which spreads out light rays that pass through it.

The first radius of curvature (R1) is -206.7 mm, and the second radius (R2) is 206.7 mm, demonstrating the double-concave design. The back focal length (BFL) is 198.46 mm, which is the distance from the rear surface of the lens to the focal point. The inner and outer radii are both 0 mm, indicating that the lens has no special curvature or treatment at its edges.

The lens is made of n-BK7 Schott, a popular optical glass known for its excellent optical properties, including a high Abbe number and low dispersion. The lens is designed to work at a wavelength of 546.1 nm, making it suitable for applications that use visible light, such as metrology, machine vision, and biomedical imaging.