APAC18 25 mm Dia. S-FSL5/S-TIH13 Aspherical Achromatic Doublet; EFL=50mm 425-675nm

The APAC18 is a high-performance lens from MKS/Newport, designed for use in the 425-675nm wavelength range. This lens boasts an effective focal length (EFL) of 50mm and features a compact 25 mm diameter. The lens is constructed as an achromatic doublet, utilizing S-FSL5 and S-TIH13 materials from Ohara to effectively minimize chromatic aberration.

The lens geometry is characterized by a 7.52mm edge thickness, a 9mm center thickness for the first element, and a 2.5mm center thickness for the second element, resulting in an overall center thickness of 11.5mm. The lens features aspherical surfaces with radii of curvature of 28.5mm and -31mm for the first element, and -66mm for the second element. The inner and outer radii are both zero, indicating a circular lens profile.

The APAC18 lens is coated with New Vis-0 on both the front and back surfaces, enhancing its transmission characteristics and overall optical performance. This lens is a multiplet, meaning it consists of multiple elements, which allows for more complex optical designs and superior performance compared to single element lenses.

The lens is currently in stock and available for purchase through the MKS/Newport website. For more information, users can refer to the provided catalog number and weblink.