High-Performance Engineering Diffuser ED25-S-20

Overview

The ED25-S-20 is a high-performance engineered diffuser that shapes an incident beam into a well-defined square spot while homogenizing its intensity profile. A precision micro-structured surface is formed on a High molecular polymer/Borofloat glass substrate substrate, giving a 21.49° x 21.33° ±5% scattering angle across the 400 nm-2000 nm operating range. The 25.4 mm element is 2.1 mm thick and offers a >90%CA clear aperture, so it can be dropped straight into a standard 25.4 mm mount.

Applications

• Laser beam homogenization and flat-top illumination
• Machine vision and structured illumination
• LiDAR and 3D sensing transmitter optics
• Display backlighting and general beam shaping

Construction & Performance

Unlike a ground-glass diffuser, the micro-structure is deterministic, so the output spot keeps its square shape and the scattered energy stays inside the specified cone instead of spreading into a wide random halo. Transmittance is >85% and the refractive index is 1.5466 @ 940 nm. Diameter tolerance is ±0.127 mm and thickness tolerance is ±0.075 mm. Key specifications for this model:

• Diameter: 25.4 mm
• Overall Thickness: 2.1 mm
• Operating Wavelength: 400 nm-2000 nm
• Spot Shape: Square
• Material: High molecular polymer/Borofloat glass substrate
• Clear Aperture: >90%CA
• Scattering Angle: 21.49° x 21.33° ±5%
• Diameter Tolerance: ±0.127 mm
• Thickness Tolerance: ±0.075 mm
• Transmittance: >85%
• Refractive Index: 1.5466 @ 940 nm

Storage & Handling

Handle the diffuser by its edges and keep the structured surface free of dust and fingerprints; the micro-structure is more delicate than a polished glass surface, so avoid abrasive wiping. When cleaning is unavoidable, blow off loose particles first and then use clean optical-grade solvent with lens tissue. Note the orientation of the structured face when mounting, and store the part in its original container in a clean, dry environment away from direct sunlight.