LED RING LIGHT AND MANUFACTURE METHOD OF LED RING LIGHT AND IMAGE MEASURING DEVICE AND OPTICAL DEVICE USING LED RING LIGHT
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United States of America Patent
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May 26, 2016
app pub date -
Nov 20, 2015
filing date -
Nov 26, 2014
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Abstract
An LED ring light including a holding frame having a generally annular shape in a plan view and an aperture into which an objective lens can be inserted around a center of the holding frame; an LED substrate held inside the holding frame in a generally frusto-conical shape; and a plurality of LEDs arranged on an inner circumferential surface of the LED substrate. The LED substrate is divided at a plurality of locations in a circumferential direction of the inner circumferential surface of the holding frame by arranging a plurality of substrates side by side.
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