This is a Plano-Convex Lens, type of Spherical Lens, offered by EKSMA Optics. The lens has a circular base shape with a diameter of 25.4 mm and a thickness edge of 2.5 mm. The effective focal length (EFL) of the lens is 400 mm, making it suitable for applications requiring long focal lengths. The lens's inner radius is 0, and the outer radius is also 0, indicating a plano-convex geometry.
The lens is made of Barium Fluoride (BaF2), a material with a wide transmission range from UV to IR, making it ideal for applications in the 3000 nm wavelength range. The material is identified as "baf2 cgdm" in the item data.
Notably, this lens does not come with any coating, as indicated by the empty "coating" field in the item data. Coatings are often applied to lenses to enhance their performance in specific applications, such as reducing reflection, increasing transmission, or providing environmental protection. However, this lens is offered in its uncoated form, which may be suitable for certain applications where coatings are not required or desired.
For more information about this lens, including pricing and availability, please refer to the vendor's website using the provided weblink. The link has been verified and is currently valid, indicating that the lens is in stock.