| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily realize a light emitting array which narrows a divergence angle of a light flux emitted from a light emitting element and does not produce flaring light. <P>SOLUTION: The light emitting element array 5 has micro lenses 4 which are formed on the light emitting elements 2 corresponding to each light emitting element face to face, and each micro lens 4 is a separated hemispherical lens. The shape of light emitting portion of the light emitting element 2 is a rectangle, when the length of the short side of the rectangle is L min, the pitch of arrangement of the light emitting element array is P, and the diameter of the lens is D, an expression Lmin≤D≤P is met. A light source unit has the micro lens corresponding to the light emitting element formed on a transparent thin film layer face to face. When the thickness from the light emitting surface of the light emitting element to the surface of the transparent thin film layer is T1 and the diameter of the micro lens is D2, an expression T1≤2×D2 is met. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
