| http://www.w3.org/ns/prov#value | - According to the reflection mirror 1, rays of light whose reflecting directions are controlled by formation of many reflection steps 9, 9, . . . on the reflection surface including the reflection surface of the main reflection portion 2 and of the circumferential wall portion 3, can be utilized as rays of light effective for luminous intensity distribution (e.g., if the focuses of the group of par
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