67-590 3mm Dia. x 3mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm

The 67-590 is a high-performance double-convex lens, designed and manufactured by Edmund Optics, a leading global provider of optical components. This lens boasts a 3mm diameter and a focal length of 3mm, making it a compact yet powerful addition to any optical system.

The lens is crafted from n-SF5 Schott, a high-refractive index material that ensures excellent light transmission and minimal optical aberrations. The base shape of the lens is circular, and it features a double-convex geometry, with radii of curvature of 3.5mm and -3.5mm, respectively. This geometry provides a large numerical aperture, enhancing the lens's light-gathering capability.

The 67-590 lens is coated with Edmund Optics' NIR-II standard curve coating on both the front and back surfaces. This coating is specifically designed for use in the near-infrared (NIR) spectrum, covering the wavelength range of 750-1550nm. It ensures high transmission and low reflectance, making it ideal for applications such as NIR imaging, spectroscopy, and sensing.

The lens has a thickness of 1.62mm at the edge and 2.3mm at the center, providing a robust structure while maintaining a low profile. The effective focal length (EFL) is 3mm, and the back focal length (BFL) is 2.21mm. The lens has no inner or outer radius, indicating a uniform curvature across its surface.