Lasers are very attractive for projection systems as they offer high contrast, a broad color spectrum and the advantage that images are always in focus. However, lasers do have the inherent problem of speckle: On optically rough surfaces, local interferences occur that manifest themselves as a grainy pattern of spots. This effect causes noise in projected images and reduces the resolution of measurement systems.
We offer a unique solution to this problem. Electroactive polymers (so-called artificial muscles) are used to oscillate a diffuser at a high frequency to average out the speckle patterns. This principle is extremely compact, completely free of mechanics and low in power consumption. Our laser speckle reducer can be customized in terms of size, frequency, coatings and diffuser structure to fit a variety of applications:
Results: In the example below, the LSR-5-17-24D-VIS was used right before a light pipe to create a homogenized, speckle free projection.
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