This is a Plano-Convex Lens, type Lens, from the renowned optical components manufacturer, Standa. The lens is circular in shape and is designed for use in the spherical geometry category. The lens has a diameter of 38.1 mm and a thickness at the edge of 3.1 mm, while the thickness at the center is 4 mm. The effective focal length (EFL) of the lens is 400 mm.
The lens's inner radius is 0, and the outer radius is also 0, indicating a plano-convex design. The radius of curvature (R1) is 206.68 mm. The lens is made of n-bk7 schott material, a popular choice for its high refractive index and low dispersion.
The lens is designed to operate at a wavelength of 546 nm. It does not come with any coating, as indicated by the empty 'coating' field in the item data. This could make it suitable for applications where coating is not required or desirable.
According to the item data, this lens is in stock and available for immediate purchase. For more information, you can refer to the vendor's website through the provided weblink, which has been verified and found to be valid.