47-377 9 mm Dia. N-LAK22/N-SF6 Achromatic Doublet; EFL=30mm NIR II 750-1550nm

The 47-377 is a high-quality achromatic doublet lens, designed and manufactured by Edmund Optics. This lens, with a 9 mm diameter, is specifically engineered for use in the near-infrared (NIR) spectrum, covering the wavelength range of 750-1550nm.

The lens is constructed from two types of Schott glass, N-LAK22 and N-SF6, which are carefully selected and arranged to minimize chromatic aberration, a common issue in optical systems. The achromatic design ensures that the lens focuses both the blue and red components of light to the same point, resulting in sharper images and improved overall system performance.

The lens has an effective focal length (EFL) of 30mm, providing a moderate magnification and field of view. The geometry of the lens includes a thickness of 4.84mm at the edge, 3.5mm at the center, and 2mm at the center a. The inner and outer radii are 0, indicating a simple, circular shape.

The lens is coated with Edmund Optics' standard NIR-II coating on both the front and back surfaces. This coating is specifically designed to enhance the lens' performance in the NIR spectrum, reducing reflection and increasing transmission. The coating also provides protection against environmental factors, ensuring the longevity and reliability of the lens.