LM11-25-175 25.4 mm Dia. N-BK7 Negative Meniscus Lens; EFL=-175mm Uncoated

This is the LM11-25-175, a 25.4 mm diameter Negative Meniscus Lens from CeNing Optics. The lens is made of N-BK7, a popular optical glass type known for its excellent optical properties and high transparency in the visible spectrum. The lens features a concave-convex base shape, which is a common design for meniscus lenses.

The lens has a center thickness of 3 mm and an edge thickness of 3.8 mm, providing a robust structure while maintaining a sleek profile. The effective focal length (EFL) of this lens is -175 mm, indicating that it is a diverging lens, which spreads out light rays. This can be useful in various applications where beam expansion is required.

The lens's inner and outer radii are both 0, suggesting a symmetrical design. The first radius of curvature (R1) is 90 mm, and the second radius (R2) is 44.86 mm. These radii, combined with the lens's material and EFL, contribute to its unique optical properties.

The lens is uncoated, which means it does not have any additional layers to enhance its optical properties or protect it from environmental factors. However, uncoated lenses can be advantageous in certain applications due to their lower cost and simpler manufacturing process.

This lens is currently in stock and can be purchased directly from the vendor's website. For more information, please refer to the provided weblink.