Gaggione has introduced a 67mm dia one-piece zoom collimator for 6mm diameter emitter CoBs – where is it said to zoom across ±5 to ±11° to 50% (10-22° FWHM) and ±9° to ±22.5° to 10% (18-45° FWTM). As this is zoomed simply by moving the one-piece collimator back and forth in front of the CoB, I was ...
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from Electronics Weekly https://www.electronicsweekly.com/blogs/led-luminaries/67mm-zoom-collimator-gaggione-new-website-2018-07/
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