This is a high-quality Double-Convex Lens, type L-14BCX700-1.5-1, manufactured by Standa. The lens is spherical in shape, with a base shape of a circle, and is designed for use in a wide range of optical applications.
The lens has a diameter of 38.1 mm and a thickness at the edge of 4.5 mm, while the thickness at the center is 5 mm. The effective focal length (EFL) of the lens is 700 mm, making it suitable for use in systems that require a long focal length. The lens features a double-convex design, with radii of curvature of 725.33 mm for the first surface and -725.33 mm for the second surface. The inner and outer radii are both 0 mm.
The lens is made from N-BK7 Schott glass, a popular material for optical elements due to its excellent optical properties and high transparency in the visible spectrum. The lens is uncoated, meaning it does not have any additional layers applied to its surfaces to alter its optical properties. This can make it more susceptible to environmental factors such as dust and moisture, but it also means that the lens will not introduce any additional chromatic aberration or other optical distortions.
The lens is designed to operate at a wavelength of 546 nm, which is in the middle of the visible spectrum. This makes it suitable for use in a wide range of applications, from imaging and metrology to laser systems and spectroscopy.