68-002 25mm Dia. x -100 FL; NIR II Coated; Plano-Concave Lens 750-1550nm

The 68-002 is a 25mm diameter Plano-Concave Lens with a focal length of -100, sourced from Edmund Optics. This lens is designed for use in the near-infrared (NIR) spectrum, specifically between 750 and 1550nm, making it suitable for a wide range of applications in this region.

The lens is made from N-BK7 Schott glass, a popular material for optical elements due to its excellent optical properties and versatility. The lens features a plano-concave geometry, meaning one side is flat while the other is curved inward. This design is often used to diverge or spread out light, making it ideal for use in imaging systems where a reduced beam size is required.

The 68-002 is coated with Edmund Optics' NIR-II standard curve coating on both the front and back surfaces. This coating is designed to enhance the lens' performance in the NIR spectrum, reducing reflections and increasing transmission. The coating also provides protection for the lens surface, helping to maintain its optical performance over time.

The lens has a thickness of 4.85mm at the edge and 3.5mm at the center. The inner and outer radii are both 0, indicating a simple, straightforward design. The lens's compact size and robust construction make it a reliable choice for various applications in the NIR spectrum.