CONCENTRATOR Russian patent published in 1995 - IPC

FIELD: lighting engineering. SUBSTANCE: concentrator has inner reflecting surface fabricated in the form of n uniaxially arranged truncated right cones. Number of cones is found from equation , i=1,2,3.n, , where d_o is diameter of output hole of concentrator; d_n is diameter of input hole of concentrator; S_o - is area of output hole of concentrator S_i is area of projection of surface of i-th cone on plane perpendicular to axis of concentrator. In this case 1,4 ≅ α ≅ 2,5. EFFECT: diminished length of concentrator, simplified manufacturing process more uniform radiation density of output hole. 1 dwg, 1 tbl