These sets of four light shaping diffusers® smooth and homogenize light sources with hotpots and uneven light distribution, providing uniform illumination for critical applications. These diffusers efficiently and precisely distribute light into specific cone angles.
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light-shaping-diffusers - Drawings
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Specifications
Wavelength Range
300-1500 nm
Transmission
0.5°-20°: ≥90% 20°-80°: ≥85%
Material
Polycarbonate
Angular Deviation
≤1°: ±0.5° >1° <10°: ±1° >10°: ±10%
Thickness
Diffuser: 0.76 mm Housing: 2.5 mm
Damage Threshold
0.22 J/cm2 with 10 nsec pulses at 1064 nm, typical
Cleaning
DI water rinse followed by forced air drying, wipe gently with lens tissue soaked with methanol, followed with forced clean air or nitrogen drying (acetone can not be used)
Features
Random, Non-periodic Surface Structures
These diffusers have a surface that is holographically replicated on polycarbonate from a holographic master. They have a surface with completely random, non-periodic structures that can be thought of as randomized micro lenslets. They cause light to diverge at up to the filter's specified cone angle. The random size and orientation of the structure eliminates both wavelength dependent effects and moiré interference effects. They will work with both polychromatic and monochromatic light that is either coherent or incoherent. They work best with collimated light but also work well in non-collimated light, albeit emitting somewhat wider than the nominal angle.
Smooth and Homogenize Light Sources
Hot spots and uneven light distribution are common problems with most light sources, including filament lamps, arc lamps, LEDs, cold cathode fluorescent lamps, fiber optics, and lasers. Light Shaping Diffusers® smooth and homogenize these sources while providing uniform light in critical applications. The energy distribution from these diffusers closely approximates a flat top distribution across the specified range of angles. Diffusers are available in both circular and elliptical beam patterns. Large angle diffusers produce the greatest degree of homogenized light.
Precisely Shape, Control, & Distribute Light
Light Shaping Diffusers also precisely shape, control, and distribute light into a specific cone angle. This cone angle can be either symmetrical (circular) or asymmetrical (elliptical). Standard circular angles range from 0.5° to 80° FWHM, while standard elliptical angles range from 0.2° x 10° to 35° x 95°. Transmission efficiency is superior to other diffusers between 365–1600 nm. The diffuser surface is antireflective in nature and therefore utilizes light that would otherwise be wasted due to Fresnel loss. LED light is shown before and after a circular and elliptical diffuser.
Applications
Homogenize laser beams and LEDs
Remove filament structure from extended sources
Homogenize and shape the output of fiber optic bundles
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