The LC1715-C is a plano-concave lens made from N-BK7 Schott glass, sourced from the reputable vendor Thorlabs. This lens is designed for use in the infrared spectrum, specifically optimized for wavelengths between 1050nm and 1700nm. The plano-concave shape, characterized by a flat front surface and a curved back surface, is ideal for a variety of applications.
The lens has a diameter of 1 inch (25.4mm) and a thickness of 6.9mm at the edge, tapering to 3.5mm at the center. The effective focal length (EFL) is -50mm, indicating a diverging lens. The front and back surfaces of the lens are coated with a broadband anti-reflection coating (ARC), specifically designed for the 1050-1700nm range. This coating reduces surface reflections, thereby increasing transmission and improving overall system performance.
The lens is spherical in shape, with a radius of curvature (R1) of -25.7mm on the curved back surface. The back focal length (BFL) is -52.3mm. The lens does not have any inner or outer radii, indicating a simple, two-surface design.