Fraen has been awarded US patent 9,411,083 for its colour-mixing zoom optics for leds. This two-part optical system has been mentioned in ths blog before, working with Led Engin LZ7 seven-colour leds, with which it zooms between: +/-29° (to 50%) and 0.7cd/lm to +/-3.5° and 14cd/lm Colour mixes in the narrow rod, and the end ...
Read full article: Fraen gets US patent for colour-mixing zoom lens
from Electronics Weekly http://www.electronicsweekly.com/blogs/led-luminaries/fraen-gets-us-patent-colour-mixing-zoom-lens-2017-02/
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