49-369 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=400mm VIS-NIR 400-1000nm

The 49-369 is a high-quality achromatic doublet lens, designed and manufactured by Edmund Optics. This lens, with a 25 mm diameter, is specifically engineered for use in the visible to near-infrared spectrum, spanning from 400 to 1000nm. The lens is part of Edmund Optics' extensive catalog, and it is currently in stock, as indicated by its weblink status.

The lens features a focal length of 400mm, indicated by its Effective Focal Length (EFL). The achromatic doublet design, which combines two different types of glass, N-BK7 and N-SF5, helps to minimize chromatic aberration, a common issue in optical systems where different wavelengths of light focus at different points. This makes the 49-369 an ideal choice for applications that require high optical precision and color correction.

The lens geometry includes a thickness of 5.03mm at the edge, with a central thickness of 3mm and a thickness of 2.5mm at the center a. The lens's base shape is circular, and it features three radii: r1 at 244.65mm, r2 at -179.62mm, and r3 at -534.1mm. The lens's inner and outer radii are both zero.

The 49-369 is coated with Edmund Optics' VIS-NIR coating (edm visnir0sp2002000) on both the front and back surfaces. This coating enhances the lens's transmission in the visible to near-infrared spectrum, further improving its performance in its intended application range.