Reflector with negative focal length

Abstract

A luminaire with reflector of negative focal length is disclosed, which comprises a light source and a luminaire screen having a reflector of negative focal length, a side screen and a plate; wherein the reflector of negative focal length is capable of reflecting the upward-incident rays emitting from the light source; and the side screen is capable of reflecting the sideward-incident rays emitting from the light source and the reflected rays of the reflector; and the plate being disposed at the lower portion of the luminaire screen beneath the light source has a plurality of micro-structures arrange thereon and is capable of accepting the rays of the downward incident area along with both the reflected rays of the reflector and the side screen so as to diffuse the same for discharging. By the luminaire screen of the invention, the rays emitting from the light source of the luminaire are reflected and directed to a preferred discharging area so as to enable the rays to be discharge out of the luminaire by large angles for reducing glare, in addition, the height of the luminaire can be reduced.

Dependencies are inferred from the claim text.