39-471 25.4mm Dia. ZnSe Aspheric Lens; EFL=12.7mm; NA=1 Uncoated

The 39-471 is a 25.4mm diameter ZnSe aspheric lens, sourced from Edmund Optics. This lens boasts an effective focal length (EFL) of 12.7mm and a numerical aperture (NA) of 1, making it a versatile choice for various optical applications.

The lens is made from ZnSe (Zinc Selenide), a material with a refractive index of 2.42 at 10.6µm, which is the wavelength specified in the item data. This material is often used in infrared (IR) optical systems due to its excellent transmission properties in the IR spectrum.

The aspheric design of the lens is a significant feature. Unlike spherical lenses, which can introduce spherical aberration, aspheric lenses can focus light more accurately over a wider range of wavelengths and field angles. This makes them ideal for applications requiring high image quality, such as imaging systems, beam shaping, and laser applications.

The lens is uncoated, meaning it does not have any additional layers to enhance its optical properties. While coatings can improve transmission, reduce reflection, and protect the lens surface, an uncoated lens can be a cost-effective choice when such enhancements are not required.

The geometry of the lens includes an inner radius of 0, an outer radius of 0, a thickness at the edge of 1.83mm, and a thickness at the center of 6mm. The front surface of the lens has a conic constant of -1.239588, indicating a relatively steep curvature.

According to the item data, this lens is in stock, making it readily available for immediate use. For more information, including detailed specifications and purchasing options, please refer to the provided weblink.