"The '519 patent concerns an imaging optical lens assembly comprising five lens elements arranged from object side to image side. The representative claim requires specific configurations, including: A first lens element with negative refractive power having a concave object-side surface; A second lens element having positive refractive power; A third lens element having negative refractive power; A fourth lens element having positive refractive power; and A fifth lens element with negative refractive power has an image-side surface that is concave in a paraxial region."
"Motorola argued that "Chung Embodiments 11 and 12 met all claim limitations except the final R1/ f limitation, which Sekine disclosed." Motorola contended that a skilled artisan would have been motivated to apply Sekine's R1/ f teaching to Chung to maintain image quality while increasing the field of view. Motorola's expert presented ZEMAX modeling evidence to demonstrate that 'a [skilled artisan] would have had a reasonable expectation of success and required no undue experimentation'."
The CAFC affirmed the PTAB decision upholding claims 1–27 of U.S. Patent No. 9,696,519 owned by Largan. The patent claims an imaging optical lens assembly with five elements having alternating positive and negative refractive powers and specified mathematical relationships among radii and focal lengths. Motorola challenged the claims as obvious over Chung in view of Sekine and argued that applying Sekine's R1/f teaching to Chung would preserve image quality while increasing field of view. Motorola's expert offered ZEMAX modeling showing feasibility. The CAFC concluded that the modeling established feasibility but not a motivation to combine, and affirmed the PTAB.
Read at IPWatchdog.com | Patents & Intellectual Property Law
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