49-365-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=225mm VIS-NIR 400-1000nm

The 49-365-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 25 mm, is designed for use in the visible to near-infrared spectrum, specifically catering to the wavelength range of 400-1000nm.

The lens boasts an effective focal length (EFL) of 225mm, making it suitable for a wide range of optical applications. The achromatic doublet design, which combines two different types of glass (N-BK7 and N-SF5), effectively minimizes chromatic aberration, ensuring sharp and clear images across the entire spectral range.

The lens geometry is meticulously designed, with a central thickness of 3mm and edge thickness of 4.67mm. The radii of curvature for the first and second surfaces are 139.53mm and -100.21mm respectively, while the third surface has a radius of -291.32mm. The lens is coated with Edmund Optics' VIS-NIR coating (edm visnir0sp2002000) on both the front and back surfaces, enhancing its transmission capabilities and overall performance in the specified wavelength range.

In terms of shape, the lens is a multiplet, indicating that it is composed of multiple elements. This complex construction further contributes to the lens's ability to correct optical aberrations and deliver superior image quality. The lens is currently in stock and available for immediate purchase through the provided weblink.