The SLB-20-70NIR2 is a Plano-Concave Spherical Lens, sourced from the reputable vendor OptoSigma. This lens boasts a diameter of 20.0 mm and a focal length of -70.0 mm, making it suitable for a wide range of optical applications.
The lens is crafted from n-bk7 schott, a high-quality optical glass known for its excellent transmittance and homogeneity. The base shape of the lens is circular, and it features an inner radius of 0 mm and an outer radius of 0 mm.
The lens's geometry is defined by a thickness edge of 3.4 mm and a thickness center of 2 mm. The back focal length (bfl) is -71.3 mm, and the radius of curvature (r1) is -36.33 mm.
The SLB-20-70NIR2 is coated with opt ir2 on both the front and back, enhancing its performance in the 750-1550nm wavelength range. This coating ensures optimal light transmission and reduces surface reflections, making it an ideal choice for applications that require high-precision optical performance.