G314323329 25.4 mm Dia. N-BK7 Plano-Concave Lens; EFL=-200mm 1064nm

This is a Plano-Concave lens with a diameter of 25.4 mm, sourced from the renowned optical components manufacturer, Qioptiq Photonics. The lens is made of N-BK7, a popular glass type known for its excellent optical properties, particularly its high refractive index and low dispersion.

The lens features a center thickness of 1.5 mm and an effective focal length (EFL) of -200 mm at a wavelength of 1064 nm. The negative EFL indicates that this is a diverging lens, which spreads out light rays that pass through it. This can be useful in various applications where beam expansion is required.

The lens's geometry includes a radius of curvature (R1) of -104.41 mm on the concave surface. The inner and outer radii are both zero, indicating that the lens has a flat outer surface.

The lens is coated with Qio HP Nbar ARHS-YAG on both the front and back surfaces. This anti-reflection coating is designed to reduce surface reflections and increase transmission, particularly at the YAG laser wavelength of 1064 nm.

The lens is spherical in shape, a common geometry for optical lenses due to its ease of manufacturing and good optical performance.

According to the vendor's website, this item is currently in stock, making it readily available for immediate use. For more information, you can refer to the provided weblink.