83-978 2 mm Dia. N-PSK53A/N-LASF9 Achromatic Doublet; EFL=9mm VIS 0° 425-675nm

The 83-978 is a high-quality achromatic doublet lens, sourced from Edmund Optics, featuring a 2 mm diameter and an effective focal length of 9mm. This lens is specifically designed for the visible spectrum, covering a wavelength range of 425-675nm.

The lens is constructed from two types of Schott glass, N-PSK53A and N-LASF9, which are carefully selected to minimize chromatic aberration, a common issue in optical systems. The curvature of the lens elements is also precisely controlled, with a first radius of curvature (r1) of 5.38mm and a second radius (r2) of -5.38mm. The lens also features a third radius (r3) of -20.79mm, which contributes to its overall optical performance.

The lens has a center thickness of 1mm and an edge thickness of 1.88mm, providing mechanical stability and resistance to deformation. The lens is also coated with the EDM Vis-0 std curve coating on both the front and back surfaces, which enhances its transmission in the visible spectrum and provides protection against environmental factors.

In terms of shape, the 83-978 is a multiplet lens, which means it consists of multiple elements. This design allows for more complex optical corrections and performance enhancements compared to single element lenses.

The lens is currently in stock and available for purchase through the Edmund Optics website, as indicated by its valid weblink status. With its high-quality materials, precise construction, and advanced coatings, the 83-978 is an excellent choice for a wide range of optical applications.