LightPath 353215 | 4mm Dia., 0.25 NA, BBAR (350-700nm), Molded Aspheric Lens

Product Details Eliminate Spherical Aberration Multiple Coating Options Available Range of Numerical Apertures LightPath Geltech Molded Aspheric Lenses are used to eliminate spherical aberration and improve focusing and collimating accuracy in a variety of laser applications. Low NA aspheric lenses are designed to maintain beam shape, while high NA lenses gather all available light to maintain beam power over long distances. LightPath Geltech Molded Aspheric Lenses are ideal for applications including sighting systems, bar code scanners, laser diode-to-fiber coupling, optical data storage, or biomedical lasers. Specifications General Type: Aspheric Lens Typical Applications: Collimate or Focus Laser Light Lightpath Lens Code: 355215 Physical & Mechanical Properties Diameter (mm): 4.00 ±0.015 Center Thickness CT (mm): 2.80 +/-0.025 Edge Thickness ET (mm): 2.284 Clear Aperture CA (mm): 3.5 Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): 6.20 @ 520nm Focal Length Tolerance (%): ±1 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More H-FK61M f/#: 1.55 Numerical Aperture NA: 0.25 Coating: BBAR (350-700nm) Coating Specification: R avg ≤0.5% @ 350 – 700nm Wavelength Range (nm): 350 – 700 Aspheric Design Wavelength (nm): 520 Working Distance (mm): 4.33 Surface Quality: 40-20 Conjugate Distance: Infinite Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 247: Compliant ×