LD1357 N-BK7 Bi-Concave Lens; Dia:12.7 mm; f=-50.0 mm Uncoated

The LD1357 N-BK7 Bi-Concave Lens is a high-quality optical component sourced from Thorlabs, a leading global manufacturer of photonics equipment. This lens, with a diameter of 12.7 mm, is designed for use in a wide range of applications that require concave-concave lenses.

The lens features a base shape of a circle, with a center thickness of 3.5 mm and an edge thickness of 4.3 mm. The effective focal length (EFL) of this lens is -50.0 mm, making it suitable for use in optical systems where a negative focal length is required. The bi-concave design, with radii of curvature of -52.1 mm for the first surface and 52.1 mm for the second surface, ensures excellent optical performance.

The LD1357 lens is made from N-BK7 glass, a popular material for optical components due to its excellent optical properties and wide transmission range. The glass has an Abbe number of 64.2, indicating low dispersion, and a refractive index of 1.5168 at 587.6 nm, which is the wavelength used in the item data.

Notably, this lens is uncoated. While coatings can enhance the performance of optical components by reducing reflection, increasing transmission, or providing other benefits, uncoated lenses can be advantageous in certain applications due to their lower cost and simpler design.

According to the vendor's website, this item is currently in stock, ensuring quick delivery for your optical project needs. For more information, you can visit the product page at https://www.thorlabs.com/thorproduct.cfm?partnumber=LD1357.