LM11-25-300 25.4 mm Dia. N-BK7 Negative Meniscus Lens; EFL=-300mm Uncoated

The LM11-25-300 is a spherical lens with a base shape of a circular geometry, sourced from CeNing Optics. This lens is a concave-convex type, designed for use in optical systems that require negative meniscus lenses. The lens has a diameter of 25.4 mm and a thickness of 3.5 mm at the edge, tapering down to 3 mm at the center.

The effective focal length (EFL) of this lens is -300mm, indicating its concave nature. The first radius of curvature (R1) is 235 mm, while the second radius (R2) is 93.13 mm. The back focal length (BFL) is -298.3 mm. The lens does not have any inner or outer radius, suggesting a uniform curvature throughout.

The lens is made of N-BK7, a popular optical glass from Schott. This material is known for its excellent optical properties, making it suitable for a wide range of applications. The lens is designed to operate at a wavelength of 546.1 nm.

Notably, this lens is uncoated. While coatings can enhance the performance of lenses by reducing reflections, increasing transmission, and protecting the lens surface, uncoated lenses can be advantageous in certain applications where specific reflectance properties are required or where cost is a significant factor.

According to the vendor's information, this lens is in stock, ensuring quick delivery for your optical system needs. For more details, you can refer to the vendor's website through the provided weblink.