In this manner, by adopting the reflective surfaces of which the light collecting position differs or by changing the height of right and left light guides, it is possible to make {HEAD ~ the change} of {TAIL ~ light distribution rate} smaller even though there is elevation of the document 
of
In this manner , by adopting the reflective surfaces of which the light collecting position differs or by changing the height of right and left light guides , it is possible to make { HEAD ~ the change } of { TAIL ~ light distribution rate } smaller even though there is elevation of the document
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