| 摘要 |
<p>PROBLEM TO BE SOLVED: To branch incident light into a plurality of luminous fluxes parallel to one another with a simpler configuration.SOLUTION: An optical branching device includes: a light guide body having a first surface and a second surface which reflect light made incident and transmitting the light between the first surface and the second surface; a first branching layer provided on the second surface for reflecting a part of the light transmitted through the light guide body, transmitting a part of the light therethrough and branching the part thereof; a first transparent body provided at a position where the light transmitted through the first branching layer is made incident on the second surface having a first reflection surface for reflecting the light made incident; and a second transparent body provided at a position where the light reflected on the first branching layer and on the first surface is made incident on the second surface having a second reflection surface for reflecting the light made incident.</p> |
