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Advance the State of the Art

We believe that one cannot advance the state of the art without first mastering it, so we see this list as evidence of some of our expertise. One of our employees was either sole or co-inventor for each of these patents. Clicking on the text will take you to the patent on the official USPTO web site.

You may notice that none of these patents are assigned to Eckhardt Optics LLC. Many of the patents are assigned to 3M, because that’s where Steve worked for 18 years. More recently, we’ve been inventing things for customers, so the patents are assigned to them. How can we help you advance the state of the art?

PAT. NO.Title
8,721,153Backlight reflectors having a prismatic structure
8,675,194Apparatus for Measuring Retroreflectance of Materials
7,804,649Microreplicated achromatic lens
7,684,126Fresnel field lens
7,475,991Polarizing beamsplitter assembly
7,411,734Color-splitting optical element and an optical system utilizing the color-splitting optical element
7,329,006Projection system having low astigmatism
7,152,981Projection illumination system with tunnel integrator and field lens
6,976,759Compound polarization beam splitters
6,857,752Projection illumination system with tunnel integrator and field lens
6,721,096Polarizing beam splitter
6,719,426Compound polarization beam splitters
6,672,721Projection system having low astigmatism
6,486,997Reflective LCD projection system using wide-angle Cartesian polarizing beam splitter
6,104,536High efficiency polarization converter including input and output lenslet arrays
5,803,568Dual grooved Fresnel lens for overhead projection
5,596,455Fixed-focus triplet projection lens for overhead projectors
5,515,123Condensers for illumination systems
5,475,535Condensers for overhead projectors
5,400,094Condensers for overhead projectors