Light Shaping Diffusers (LSD)

High Transmission Efficiency – up to 92% Luminit’s holographic Light Shaping Diffusers offer superior optical transmission between 400nm and 1500nm. Depending on the angle of distribution, LSDs will achieve between 85% and 92% transmission efficiency. The low back-scatter of LSD structures are anti-reflective in nature and utilize light that would otherwise be wasted due to Fresnel loss. A clear piece of polycarbonate substrate is 89% transmissive. With LSD, transmission improves to 92%. Note: Luminit measures transmission utilizing an integrated sphere with the LSD structure incident to the light source. Listed are the transmission efficiencies of a 10° LSD measured at the following wavelengths: 532nm-90%, 632nm-90%, 850nm-89%, 980nm-89%, 1064nm-89%, 1550nm-88%. (UV Transmitting Diffusers are also available.)  Higher transmission results in more light output from the same source.

Beam Shaping LSDs precisely shape, control and distribute light. The Patented holographic master recording process, allows a variety of circular or elliptical light patterns. Standard circular angles range from 0.5° to 80° FWHM. A wide variety of standard elliptical angles are available from 0.2° x 10° to 95° x 35°.  Beam shaping puts more of the light where it is needed.

Homogenized Light “Hotspots” and uneven light distribution are common problems with filament, arc, LED, CCFL, fiberoptic and laser light sources. LSDs greatly smooth and homogenize sources while providing uniform light in critical applications such as LCD backlights, LED displays, machine vision, automotive lighting and viewing screens. Large angle LSDs produce the greatest degree of homogenized light.   Homogenization provides a uniform pattern of light in the target area.

See Downloads/ Catalogs/ LSD Angles, Sizes and Substrates for additional information.