49-391 50 mm Dia. N-BAK4/N-SF10 Achromatic Doublet; EFL=150mm VIS-NIR 400-1000nm

The 49-391 is a high-quality achromatic doublet lens, boasting a 50 mm diameter and an effective focal length of 150mm. This lens is designed for use in the visible to near-infrared spectrum, covering the wavelength range of 400-1000nm.

The lens is composed of two elements, made from N-BAK4 and N-SF10 Schott glass, which are renowned for their excellent optical properties. The use of these materials helps to minimize chromatic aberration, ensuring sharp and clear images across the entire spectral range.

The lens has a robust construction, with a thickness of 8.92mm at the edge and 9.5mm at the center. The center thickness can be further adjusted to 4mm, providing flexibility for various optical configurations. The lens also features a generous inner radius of 0mm and an outer radius of 0mm, allowing for a wide range of applications.

The 49-391 is coated with Edmund Optics' VIS-NIR coating (edm visnir0sp2002000) on both the front and back surfaces. This coating is designed to enhance the lens's performance in the visible to near-infrared spectrum, reducing reflection and increasing transmission.

This lens is available from Edmund Optics and is currently in stock, making it an ideal choice for users looking for a high-performance achromatic doublet lens for their optical systems.