22-937 15mm Dia. N-SF6 Precision NIR Aspheric Lens; EFL=30mm; NA=0.25 Laser V-Coat 1550nm

This is the 22-937 model from Edmund Optics, a 15mm diameter N-SF6 Precision Aspheric Lens, specifically designed for Near-Infrared (NIR) applications with a center wavelength of 1550nm. The lens boasts an effective focal length (EFL) of 30mm and a numerical aperture (NA) of 0.25, making it ideal for a wide range of optical systems.

The lens is made from N-SF6 Schott glass, a material known for its excellent optical properties and durability. The aspheric design of the lens helps to reduce spherical aberration, a common issue in optical systems, thereby improving image quality and resolution.

The lens features a laser-optimized V-coat, designed specifically for 1550nm, which enhances its transmission capabilities and reduces reflection. This coating is applied to both the front and back surfaces of the lens, ensuring optimal performance in both transmitting and receiving applications.

The lens has a thickness of 3.76mm at the edge and 5mm at the center. The front and back surfaces have a radius of curvature of 8.58mm and 0mm respectively, with the front surface having a very small inclination (e front: 7.761231e-05) and a negligible asphericity (f front: -1.512125e-08, g front: -1.010535e-09, h front: -6.978112e-12, j front: 4.47909e-14).