| 摘要 |
<p>PURPOSE:To reduce the irregularity of luminous intensity by transmitting emitted light into a light guide plate through an incident means provided at one end of the light guide plate, emitting the light to the outside of the light transmission plate at a specified angle by a diffracting means, reflecting the light which is not diffracted and reaches the other end of the light guide plate, and emitting the light to the outside of the light transmission plate at the specified angle by the diffracting means. CONSTITUTION:A red light beam 111 emitted from a light source 110 is made incident on the light guide plate 101 through an incident prism 102, and the red light beam 111 advancing in the plate 101 is made incident on a hologram 105. The hologram 105 changes the red light beam 111 at the specified angle, and radiates the red light beam 113 in a specified direction outside the plate 101. The light which is not diffracted in the hologram 105 is reflected on a mirror surface 104 provided on a deflecting prism 103, and becomes the red light beam 112. The red light beam 112 is made incident on the hologram 106 again, changed at the specified angle, and radiated in the specified direction outside the plate 101 as the red light beam 114. The red light beams 113 and 114 are utilized for a high mount stop lamp of a vehicle.</p> |
