22-704 75mm Dia. N-BK7 Precision Aspheric Lens; EFL=112.5mm; NA=0.33 BBAR 425-675nm

The 22-704 is a high-precision asperic lens offered by Edmund Optics, boasting a 75mm diameter and a numerical aperture of 0.33. This lens is designed for use in the visible spectrum, specifically optimized for wavelengths of 587.6nm.

The lens is crafted from N-BK7, a high-quality borosilicate glass known for its excellent optical properties. This material ensures high transmission and low dispersion, making it ideal for a wide range of applications.

The asperic design of the lens provides superior image quality, reducing spherical aberration and other optical distortions. The lens features a 112.5mm effective focal length (EFL), making it suitable for use in moderate to high magnification systems.

The lens is coated with BBAR (Broadband Anti-Reflection) coating, which enhances its light transmission capabilities across the 425-675nm spectrum. This coating reduces surface reflections, improving the overall efficiency and quality of the optical system.

The lens has a center thickness of 16.8mm and an edge thickness of 4.13mm, providing robustness and durability. The front and back surfaces of the lens are coated with the same BBAR coating, ensuring optimal performance from both sides.