69-491 12.0mm Dia. x 54.0mm FL; Plano-Convex Lens Laser V-Coat 785nm

The 69-491 is a Plano-Convex spherical lens, a type of optical lens featuring one flat and one curved surface, with a diameter of 12.0mm and a focal length of 54.0mm. This lens is designed for use with a wavelength of 785nm, making it suitable for applications in the near-infrared spectrum.

The lens is fabricated from N-BK7 Schott, a popular optical glass due to its excellent optical properties, including a high Abbe number and low dispersion. This makes the lens ideal for applications requiring high image quality and minimal chromatic aberration.

The lens features a laser-optimized V-coat coating on both the front and back surfaces. This coating is specifically designed to enhance the lens' performance in laser applications, providing high transmission and low reflection at the specified wavelength. The coating also offers excellent environmental stability, ensuring the lens maintains its performance over time.

The geometry of the lens includes a thickness of 2.35mm at the edge and 3mm at the center. The lens's inner and outer radii are 0, indicating a uniform curvature across the lens surface. The lens's effective focal length (EFL) is 54.0mm, and the back focal length (BFL) is 52.02mm.

This lens is available from Edmund Optics and is currently in stock, according to the vendor's website. The provided weblink provides direct access to the product page for further information or to place an order.