ť̴ ̿(LD)ü. LD ȣ ϴ ݵü ڷ Ŀ(), ڵ ij, ̿ȴ. ݱ⺸ ǰ ߱ ̿(LED), ǥ߱ ̿(VCSEL) LED ϰ, VCSEL ü .
LD 1980 鿡 ۵ 2000 ұ Ȯƴ. 2005 Z ö, LED Ȯ뿡 κ ü LED ȯߴ. ̿ ť̰ LD ߰ ִ.
ȸ ֱ ߴ. 2б 66 7% پ. ҿ δ 7 46% ߰, 6 50% پ. ǰ Ǹŷ ҿ ̴.
ֽMRI м , 7%
ڰ ֽMRI м ť ŷµ 25 18 ü 128( 7%) ߴ.
ֿ ϸ 繫 ̴. Һ ͼ ɼ .
â 5 2 Ҵ. 繫Ȱ 帧 (+), 帧 (-) ݿƴ.
ֽMRI ڿ ü ǽð м . MRI ͼ强 繫 Ӹ ƴ϶ Ӽ ִ ° ְ ر Բ ǴѴ. ֽMRI 25 ְ ̸ 췮 ̴. 5 ΰ · Ÿ.
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