<p><b>High Transmission Efficiency &ndash; up to 92%</b></p><p>Luminit&rsquo;s holographic Light Shaping Diffusers offer superior optical transmission between 400nm and 1500nm.&nbsp; Depending on the angle of distribution, LSDs will achieve between 85% and 92% transmission efficiency. The low backscatter of LSD structures is anti-reflective in nature and conserves light that would otherwise be wasted due to Fresnel loss.&nbsp; A clear piece of polycarbonate substrate is 89% transmissive.&nbsp;&nbsp; With LSD, the transmission improves to 92%. Note: Luminit measures transmission utilizing an integrated sphere with the LSD structure incident to the light source.&nbsp; Following are the transmission efficiencies of a 10&deg; LSD measured at the following wavelengths: 532nm-90%, 632nm-90%, 850nm-89%, 980nm-89%, 1064nm-89%, 1550nm-88%. (UV Transmitting Diffusers are also available.)&nbsp; Higher transmission results in more light output from the same source.</p><p><b>Beam Shaping</b></p><p>LSDs precisely shape, control and distribute light.&nbsp; Luminit&rsquo;s patented holographic master recording process, allows a variety of circular and elliptical light patterns.&nbsp; Standard circular angles range from 0.5&deg; to 100&deg; FWHM. A wide variety of standard elliptical angles are available from 0.2&deg;x10&deg; to 95&deg;x35&deg;.&nbsp;&nbsp; Beam shaping puts more of the light where it is needed.</p><p><b>Homogenized Light</b></p><p>&ldquo;Hotspots&rdquo; and uneven light distribution are common problems with filament, arc, LED, CCFL, fiber-optic and laser light sources.&nbsp; LSDs greatly smooth and homogenize sources, providing uniform light in critical applications such as LCD backlights, LED displays, machine vision, automotive lighting and viewing screens.&nbsp; Homogenization provides a uniform pattern of light in the target area.&nbsp; Large-angle LSDs produce the greatest level of homogenization.&nbsp;</p><p><a href="/tech-info/downloads">See Download Catalogs for additional information</a>.</p><p><b>How LSDs work</b></p><p>LSD&reg; diffuser films are passive, weakly-diffracting, optical components with random (non-periodic) holographic surface relief patterns that perform spectral and angular redistribution of energy carried by wavefronts of coherent sources (like lasers) and partially coherent sources (like cold cathode fluorescent tubes and light emitting diodes).&nbsp; LSDs are non-wavelength dependent and will work with white, monochromatic, coherent or incoherent light.&nbsp; LSDs work best with collimated light, but will also work well with non-collimated light.&nbsp;</p><p>LSDs are fabricated using patented holographic exposure techniques involving laser recording of submicron speckle features in photosensitive materials. The size and orientation of the speckles can be custom tailored to meet brightness, uniformity, and viewing angle requirements for a given application. The LSD&rsquo;s fully-randomized (non-periodic) microstructures produce high quality homogeneous light, are non-wavelength dependent, and eliminate moiré (color fringing) without chromatic aberration.</p><p>Incoming light is precisely controlled into well-defined output areas. Light does not escape these boundaries, resulting in greater control and utilization of light, thus maximizing photon utilization.&nbsp;&nbsp; LSDs provide greater photon density compared to other diffusers, making LSDs very suitable for high ambient or highly efficient light conditions.</p><p>&nbsp;</p>