• Combines a Condenser and a Diffuser into a compact Single Optic
• 50 mm Diameter
• 1500 Grit Polished
• AR Coating: 350 - 700 nm
• Offers Higher NA and Less Spherical Aberration than Spherical Lenses

This Thorlabs' Aspheric Condenser with Diffuser is designed for collimating light from lamp, LED, or similar light sources with a highly uniform illumination pattern. The fine grind, 1500 grit, provides a higher transmittance but has less diffusion.

When collimating high-power LEDs, the structure of the source can ultimately be imaged and shows a highly non-uniform illumination pattern. For many applications this is not desired. Adding a diffuser on the plano surface ensures a uniform illumination of the light source in far field. The aspheric surface is precision molded on the aspheric side and polished with 1500 grit on the plano side. Polished diffusers are advantageous over sand blasted diffusers as the surface has greater uniformity.

• Focal Length Tolerance: ±5%
• Design Wavelength: Visible
• Wavelength Range (A-Coated Lenses): 350 - 700 nm
• Surface Quality: 60 - 40 Scratch-Dig
• Diameter Tolerance: +0.0 mm / -0.5 mm
• Center Thickness Tolerance: ±0.3 mm
• Edge Thickness Tolerance: ±0.3 mm
• Centering Tolerance (Wedge): 30 arcmin
• Temperature (Max): 250 °C
• Glass Type: B270 Optical Crown Glass
• RoHS: Compliant
• Diameter: 50 mm
• f: 40 mm
• f/#: 0.80
• Clear Aperture (mm): >90%
• f_b: 26.20 mm
• Numerical Aperture (NA): 0.554
• Center Thickness: 21 mm
• Edge Thickness: 2.62 mm
• Non-Aspheric Surface: Plano