Patent ID: 8591077
Filing Date: 2013-11-26
Classification: F21S,F21V,F21Y,G02B

Abstract:
1. A lens, capable of being used with a plurality of light sources in combination, and having a single focus, the lens comprising: a plurality of light incident portions each disposed so as to face each of the plurality of light sources, the plurality of light incident portions configured to collimate light beams emitted from the plurality of light sources in parallel with a predetermined optical axis while guiding the light beams inside the lens; and a light exiting portion including a refracting surface disposed on optical paths of the collimated light beams guided from the plurality of the light incident portions into the inside of the lens, the light exiting portion configured to cause the collimated light beams to exit and converge on the single focus, wherein: the light exiting portion includes a center lens portion and a surrounding lens portion configured to surround the center lens portion; the center lens portion includes a center light exiting surface disposed on at least part of the optical paths of the collimated light beams so that the collimated light beams exit through the center light exiting surface and converge on the single focus; the surrounding lens portion includes a surrounding light exiting surface configured to surround the center light exiting surface and a reflecting surface disposed on at least a part of the optical paths of the collimated light beams; and the reflecting surface configured to reflect the collimated light beams so as to cause the reflected light beams to exit through the surrounding light exiting surface and converge on the single focus.