49-378 30 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=300mm VIS-NIR 400-1000nm

The 49-378 is a high-quality achromatic doublet lens, designed and manufactured by Edmund Optics. This lens, with a diameter of 30 mm, is specifically engineered for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning from 400 to 1000nm.

The lens features a focal length (EFL) of 300mm, making it suitable for applications that require a long focal length. The achromatic design of the lens ensures that it effectively corrects for chromatic aberration, a common issue in optical systems where different wavelengths of light focus at different points.

The lens is composed of two elements, made from N-BK7 and N-SF5 Schott glass. These materials were chosen for their excellent optical properties, including high transmittance and low dispersion. The lens is coated with Edmund Optics' VIS-NIR coating (edm visnir0sp2002000), which further enhances its performance by reducing surface reflections and increasing transmission.

The lens geometry includes a central thickness of 4.5mm, with a slightly thinner edge at 2.5mm. The radii of curvature for the first and second surfaces are 184.4mm and -133.95mm, respectively, while the third surface has a radius of -394.96mm. The lens also features an inner radius of 0mm and an outer radius of 0mm.

According to the vendor's website, this lens is currently in stock, making it readily available for immediate use. For more information, including detailed specifications and purchasing options, please refer to the provided weblink.