This is a 25 mm diameter achromatic doublet lens, catalog number 13-010, sourced from Edmund Optics. The lens is designed for use in the 400-700nm spectral range, making it suitable for a wide range of optical applications. The lens is mounted and coated with MgF2, which is known for its standard curve characteristics.
The lens features a focal length of 125mm, indicated by the EFL (Effective Focal Length) value. The geometry of the lens includes a thickness of 6.89mm at the edge, a center thickness of 6mm, and a center thickness 'a' of 2.4mm. The lens's inner and outer radii are 0, and it has a base shape of a circle.
The lens is composed of two types of glass, N-BK7 and N-SF5, both from Schott. The use of these materials in a doublet configuration helps to correct chromatic aberration, a common issue in optical systems. The lens is designed as a multiplet, which means it is composed of multiple elements to achieve superior optical performance.
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