| 摘要 |
A reflector (10) for a fluorescent fixture having an elongate generally cylindrically concave inner surface (26) defining a cavity, which inner surface (26) has spaced parallel opposite edges (28) defining an open outlet side for the cavity and has a longitudinal reflectivity axis (30) midway between and parallel to the opposite edges (28) and spaced into the cavity from the open side of the cavity so that all portions of a fluorescent lamp (18) coaxially positioned along the reflectivity axis (30) are within the cavity. The inner surface (26) of the reflector (10) includes a specularly reflective major central portion (32) between its edges adapted to reflect a major position (20) of the light emitted from a fluorescent lamp (18) coaxially positioned along the reflectivity axis (30) in first directions generally normal to the reflectivity axis (30) and generally normal to an imaginary plane across the outlet side of the cavity (i.e., indirections deviating from a 90 degree angle with respect to that imaginary plane by less than about 35 degrees), and opposite reflective signal portions (24) adjacent those edges (28) each oriented so that a minor portion (22) of the light emitted by a fluorescent lamp (18) coaxially positioned along the reflectivity axis (30) is directed by each signal portion (24) across the open side of the cavity and past the opposite edge (28) of the inner surface. Thus, when the reflector (10) is positioned to direct light from a fluorescent lamp (18) coaxially positioned along the reflectivity axis (30) downwardly toward an area to be illuminated, light reflected from the signal portions (24) will indicate to persons spaced from the illuminated area in a direction generally normal to the edges (28) of the inner surface (26) that the fluorescent lamp (18) is emitting light. |
