LSB02304 4 mm Dia. Sapphire Ball Lenses Uncoated

The LSB02304 is a ball lens with a diameter of 4 mm, sourced from Knight Optical. This lens is specifically designed for use in the ultraviolet, visible, and near-infrared spectrum, making it a versatile choice for a wide range of optical applications.

The lens boasts an effective focal length (EFL) of 2.3 mm, which is a crucial parameter in determining the lens's performance in a given system. The EFL is the distance from the lens's center to the point at which light rays converge or diverge, and it plays a significant role in focusing and imaging applications.

The LSB02304 is made from high-quality sapphire, identified in the item data as "al2o3 mal-1972-n-o". Sapphire is a highly durable and scratch-resistant material, making it an excellent choice for applications that require robust and long-lasting optical components.

Notably, this lens is uncoated, meaning it does not have any additional layers applied to its surface to alter its optical properties. While coatings can be beneficial in reducing reflections, increasing transmission, or adding other specialized properties, an uncoated lens can be the best choice for certain applications, particularly those where simplicity, cost-effectiveness, or specific optical characteristics are paramount.