33-944 25 mm Dia. L-BAL35 Precision Aspheric Lens; EFL=50mm; NA=0.25 Uncoated

The 33-944 is a high-precision aspheric lens, boasting a 25 mm diameter and a numerical aperture of 0.25. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for purchase on their website. The lens is uncoated, which means it does not have any additional layers to enhance light transmission or protect the surface.

The lens is made from L-BAL35, a high-quality optical glass developed by Ohara. This material is known for its excellent transparency and low autofluorescence, making it ideal for applications that require high-resolution imaging and minimal background noise.

The geometry of the lens is carefully designed to optimize its performance. It has an inner radius of 0 mm, an outer radius of 0 mm, and a thickness at the edge of 2.8 mm. The effective focal length (EFL) is 50 mm, and the back focal length (BFL) is 46.54 mm. The thickness at the center of the lens is 5.5 mm.

The lens also features an aspheric surface with a conic constant of -0.71. This design helps to correct spherical aberration, a common issue in traditional spherical lenses. The lens has a high degree of symmetry, with the front and back surfaces having the same curvature (R1 and R2 are both 29.457 mm).

The lens is suitable for use with light of wavelength 587.6 nm. It is important to note that the lens does not come with any coatings, so it may not perform optimally in environments with high levels of dust or moisture.