| 摘要 |
PROBLEM TO BE SOLVED: To provide an illumination lamp in which utilization of reflection light is highly efficient and which has the degree of freedom for light distribution.SOLUTION: An illumination lamp includes: a light emitting part 60 on which a light source comprising an LED 51 is mounted; and an internal total reflection prism 70 which is arranged next to the light source, which changes a traveling direction of light radiated laterally from the light source and which emits light in which the traveling direction is changed; and a translucent light diffusion cover 40 which is arranged so as to cover the light source and the internal total reflection prism. The internal total reflection prism 70 includes: an incident prism 71 for allowing the light to enter; an emission prism 72 for emitting the light; and a reflection mirror 73. The incident prism 71 radiates the entered light to the reflection mirror 73, the reflection mirror 73 reflects the radiated light to the emission prism 72 and the emission prism 72 emits the reflected light. |
