SLB-40B-50NIR1 40.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 633-1064nm

The SLB-40B-50NIR1 is a high-quality double-concave lens, boasting a diameter of 40.0 mm and a focal length of -49.7 mm. This lens is sourced from OptoSigma, a renowned vendor known for their precision optical elements. The lens is made from n-bk7 schott, a material widely used in optical systems due to its excellent optical properties.

The lens features a unique double-concave geometry, with radii of curvature of -51.9 mm and 51.9 mm for the front and back surfaces, respectively. This geometry results in a back focal length of -50.3 mm, making it suitable for a wide range of applications. The lens has an edge thickness of 10 mm and a center thickness of 2 mm, ensuring robustness and durability.

The SLB-40B-50NIR1 is coated with opt ir1 on both the front and back surfaces. This coating enhances the lens's performance in the 633-1064nm wavelength range, making it ideal for use in systems operating in the near-infrared spectrum. The coating also provides improved scratch resistance and reduced light loss due to reflection, ensuring optimal performance and longevity.