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
8,721,153 Backlight reflectors having a prismatic structure
8,675,194 Apparatus for Measuring Retroreflectance of Materials
7,804,649 Microreplicated achromatic lens
7,684,126 Fresnel field lens
7,475,991 Polarizing beamsplitter assembly
7,411,734 Color-splitting optical element and an optical system utilizing the color-splitting optical element
7,329,006 Projection system having low astigmatism
7,152,981 Projection illumination system with tunnel integrator and field lens
6,976,759 Compound polarization beam splitters
6,857,752 Projection illumination system with tunnel integrator and field lens
6,721,096 Polarizing beam splitter
6,719,426 Compound polarization beam splitters
6,672,721 Projection system having low astigmatism
6,486,997 Reflective LCD projection system using wide-angle Cartesian polarizing beam splitter
6,104,536 High efficiency polarization converter including input and output lenslet arrays
5,803,568 Dual grooved Fresnel lens for overhead projection
5,596,455 Fixed-focus triplet projection lens for overhead projectors
5,515,123 Condensers for illumination systems
5,475,535 Condensers for overhead projectors
5,400,094 Condensers for overhead projectors