The 67-437 is a Plano-Convex lens, a type of spherical lens, sourced from Edmund Optics. This lens boasts a 2.5mm diameter and a 4.0mm focal length, making it suitable for a wide range of applications. The lens is fabricated from n-lasf9 Schott, a material known for its excellent optical properties.
The lens features a plano-convex geometry, meaning one side is flat while the other is curved. The curvature of the lens is defined by a radius of 3.4mm, and the lens has a central thickness of 0.8mm and an edge thickness of 0.56mm. The effective focal length (EFL) of the lens is 4mm, and the back focal length (BFL) is 3.57mm.
The 67-437 lens is coated with Edmund Optics' standard NIR-II coating on both the front and back surfaces. This coating is specifically designed for the near-infrared (NIR) spectrum, covering the wavelength range of 750-1550nm. This coating enhances the lens' performance in the NIR region, making it ideal for applications such as night vision, thermal imaging, and spectral analysis.