| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a projector in which glare is reduced.SOLUTION: The projector includes a semiconductor light emitting element and a light transmission member 104 which transmits light from the semiconductor light emitting element toward the front. A plurality of Fresnel steps 154a to 154g are formed on an emission surface 104b of the light transmission member 104. The step widths Wa to Wg of the plurality of Fresnel steps 154a to 154g are larger than 0.5 mm and smaller than or equal to 50 mm, respectively. The focal distance of the light transmission member 104 is in a range from 50 mm to 100 mm.</p> |
