| 摘要 |
PROBLEM TO BE SOLVED: To prevent light pollution by concentrating lights in the horizontal and the upper direction and to improve a luminous efficiency. SOLUTION: This aircraft obstruction light is equipped with a mirror (1) whose section is parabolic, an auxiliary reflective mirror (5) that is positioned inside the mirror (1) and that has a reflective surface smaller than the mirror (1), a slender light source (3) that is positioned near the focus of the auxiliary reflective mirror (5) and the mirror (1), and a case (4) that accommodates the light source (3), the mirror (1) and auxiliary reflective mirror (5). The auxiliary reflective mirror (5) is positioned oppositely to the mirror (1) with the light source (3) in between, the case (4) has an opening (4a) formed in the position that is the horizontal reflection of the mirror (1), the auxiliary reflecting mirror (5) is positioned between the opening (4a) and the light source (3), thus, light does not reflect lower than the horizontal direction. |
