SLSQ-40-200N 40.0 mm Dia. x -200.0 mm FL; Plano-Concave Lens Uncoated

OptoSigma's SLSQ-40-200N is a fused silica plano-concave lens, uncoated and designed for general use. This lens boasts a diameter of 40.0 mm and a focal length of -200.0 mm, making it suitable for a wide range of applications.

The lens's geometry is characterized by a thickness edge of 4.2 mm, a thickness center of 2 mm, and an effective focal length (EFL) of -200 mm. The radius of curvature (RoC) is -92 mm, and the back focal length (BFL) is -201.4 mm. The lens's inner and outer radii are both 0 mm, indicating a planar surface on one side and a concave surface on the other.

The lens is made of fused silica, a material with a high transmission range, low auto-fluorescence, and excellent thermal shock resistance. This makes it an ideal choice for applications involving high power lasers or extreme temperatures. The material ID for this lens is "fused sil mal-1965".

The lens is designed to operate at a wavelength of 546.1 nm. It is spherical in shape and uncoated, meaning it does not have any anti-reflective or other coatings applied to its surfaces. This may result in higher reflectivity, especially at larger angles of incidence, but can also simplify cleaning and maintenance procedures.