542-7250 25.4 mm Dia. x -1000 mm FL; Uncoated; Plano-Concave Lens

This is a Plano-Concave Lens, type Spherical Lens, offered by EKSMA Optics. The lens has a circular base shape with a diameter of 25.4 mm and a center thickness of 2.5 mm. The effective focal length (EFL) is -1000 mm, indicating that it is a diverging lens. The first radius of curvature (R1) is -512.3 mm, while the second radius of curvature (R2) is not specified, as it is typically 0 for Plano-Concave lenses.

The lens is made of Barium Fluoride (BaF2), identified by the Material ID "baf2 cgdm". This material is known for its excellent transparency in the ultraviolet (UV) and infrared (IR) regions, making this lens suitable for applications in these spectral ranges. The wavelength of operation is 3000 nm.

The lens does not come with any coating, as indicated by the empty "coating" field in the item data. This may make it more susceptible to environmental factors such as dust, moisture, and scratches, but it can be beneficial for applications where coating may interfere with the desired optical properties.

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