The 88-819-INK is a Plano-Convex lens, a type of spherical lens, sourced from Edmund Optics. This lens, with a diameter of 9.0mm, is designed for use in the visible light spectrum, specifically at a wavelength of 587.6nm. The lens has a front and back coating of YAG-BBAR, which is optimized for the wavelength range of 500-1100nm.
The lens's geometry is defined by its edge thickness of 1.73mm and center thickness of 2.0mm. The effective focal length (EFL) is 72.0mm, and the radius of curvature (R1) is 37.21mm. The back focal length (BFL) is 70.68mm, and both the inner and outer radii are 0mm.
The lens is made of N-BK7 Schott, a popular optical glass due to its excellent optical properties and relatively low cost. This lens is inked, which is a process that adds a dye to the lens to enhance its visibility or to mark it for identification purposes.
The weblink provided is valid and indicates that the lens is in stock, making it readily available for immediate use. This lens is a versatile and reliable option for applications that require a Plano-Convex lens with a specific wavelength range and coating.