This is a Plano-Concave Spherical Lens, type HO-PVL50-06B, with a diameter of 50mm. The lens is sourced from Holmarc Opto-Mechatronics, a reputable vendor in the optical industry. The lens is made of N-BK7, a popular glass type known for its excellent optical properties, specifically from Schott, a leading glass manufacturer.
The lens has a center thickness of 2.5mm and an effective focal length (EFL) of -300mm, making it a negative or diverging lens. The radius of curvature (R1) is -156.485mm, and the lens has no inner or outer radius, indicating it is a plano lens on one side and concave on the other.
The lens is coated with BBAR (Broadband Anti-Reflection) coating, which is designed to reduce reflection and increase transmission over a wide range of wavelengths, specifically 400-700nm. This coating is applied on both the front and back surfaces of the lens, denoted as "hol bbbar 0 aoi" in the item data.
The lens is currently in stock and available for immediate purchase. For more information, please refer to the vendor's website or contact their sales department.