BICV-FS01 6 mm Dia. x -15 mm FL; Uncoated; Double-Concave Lens

The BICV-FS01 is a high-precision double-concave lens, sourced from WTS Photonics, with a diameter of 6 mm and a focal length of -15 mm. This lens is designed for use in applications where a negative focal length is required, making it suitable for use in various optical systems such as beam expanders, collimators, and other systems where light needs to be focused or diverged.

The lens is made from fused silica (mal-1965), a material known for its high transparency across a wide range of wavelengths, making it an ideal choice for applications in the visible spectrum, such as laser systems and metrology. 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 offer superior optical quality and lower cost compared to coated lenses.

The lens geometry includes an edge thickness of 2.15 mm and a center thickness of 1.5 mm. The inner and outer radii are both 0, indicating a symmetrical design. The back focal length (BFL) is 15.5 mm, slightly longer than the focal length due to the lens's concave-concave shape.