67-677 50mm Dia. x 250mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm

This is a 67-677 model double-convex lens, manufactured by Edmund Optics, with a diameter of 50mm and a focal length of 250mm. The lens is designed for use in the near-infrared (NIR) spectrum, specifically between 750nm and 1550nm, making it suitable for various applications in this range.

The lens is made from n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence. This makes it an ideal choice for applications that require high-resolution imaging and minimal signal interference.

The double-convex geometry of the lens, with radii of curvature of 257.57mm and -257.57mm for the first and second surfaces, respectively, provides a high degree of focusing power. The lens has an effective focal length (EFL) of 250mm, a central thickness of 4.93mm, and an edge thickness of 2.5mm, contributing to its robustness and durability.

The lens features a standard NIR-II coating on both the front and back surfaces, which is designed to enhance its performance in the NIR spectrum. This coating helps to reduce surface reflections and increase transmission, thereby improving the overall image quality.

In terms of shape, the lens is spherical, which is a common and versatile lens shape due to its ease of manufacturing and wide range of applications. The lens is circular in base shape, further adding to its versatility and applicability in various optical systems.

According to the provided data, the lens is currently in stock and can be purchased directly from the vendor's website. The link to the product page is provided for your convenience.