| 主权项 |
1. An LED optical assembly comprising:
a plurality of light emitting diodes (LEDs), each having an optical axis and a light emission pattern surrounding said optical axis, said plurality of LEDs being arranged in a linear array on a substantially planar support and provided with connections to electrical power, said linear array having a length and the optical axes of said plurality of LEDs included in a first plane perpendicular to said planar support; a pair of longitudinal reflecting surfaces separated by said first plane and extending along opposite sides of said linear array, said longitudinal reflecting surfaces defining a trough having a generally parabolic sectional configuration and a linear focal axis passing through the light emitting dies of said LEDs, said trough including surfaces of rotation extending from a bottom edge to a top edge of each said reflecting surface and defined by a curve rotated about the optical axis of each said LED, said trough including linear reflecting portions defined by a curve projected along the linear focal axis, said linear reflecting portions alternating with said surfaces of rotation; whereby light emitted from said at least one LED and incident upon said surfaces of rotation is redirected into trajectories parallel with the optical axis of said at least one LED and light incident upon said linear reflecting portions is redirected into trajectories at an angle of less than 20° divergence from said first plane. |
