| 摘要 |
PROBLEM TO BE SOLVED: To provide a light emitting system having a lighting angle adjustment device and capable of changing a lighting angle [or a shape of light] of light flux.SOLUTION: A light emitting system 1 for projecting light flux toward a plane includes a light emitting device 18 and a lighting angle adjustment device. The light emitting device generates the light flux. The lighting angle adjustment device is positioned between the plane and the light emitting device and further positioned on a transmitting path of the light flux to change a lighting angle of the light flux. The lighting angle adjustment device includes a first lens 16. The first lens includes a light ejection part 162 and a light incident part 160 adjacent to the light ejection part. An outer diameter of the light ejection part is larger than an outer diameter of the light incident part, an outer diameter of the light incident part is gradually decreased as it is spaced apart from the light ejecting part, and a recess 164 is formed at a side opposite to the part adjacent to the light ejection part at the light incident part.SELECTED DRAWING: Figure 3 |
