33-961 25mm Dia. UVFS Aspheric Lens; EFL=17.5mm; NA=0.69 VIS 425-675nm

This is the 33-961 model from Edmund Optics, a 25mm diameter UV Fused Silica Aspheric Lens, specifically designed for applications within the visible light spectrum (425-675nm). The lens boasts an impressive numerical aperture (NA) of 0.69, indicating a high light-gathering capability and resolution.

The lens's effective focal length (EFL) is 17.5mm, suggesting a moderate magnification power. This makes it suitable for a wide range of applications, from imaging to beam shaping, where a balance between magnification and field of view is required.

The lens is made from UV Fused Silica, a material known for its excellent optical properties, including high transparency across a wide spectral range and high resistance to thermal shock and chemical etching. This makes the lens ideal for use in harsh environments or applications involving intense light sources.

The lens features an aspheric design, which helps to correct spherical aberration, a common issue in traditional spherical lenses. This results in improved image quality, particularly at the edges of the field of view. The lens also has a high-quality coating, specifically designed for the visible light spectrum (VIS 425-675nm), which further enhances its light transmission capabilities and protects it from environmental hazards.