| 摘要 |
PROBLEM TO BE SOLVED: To improve the utilization efficiency of optical signals from a light emitting element, to improve the photodetection ability of a light receiving element and to miniaturize a small-sized electronic equipment in the case of providing the light emitting element and the light receiving element. SOLUTION: A lens case unit (light guiding unit) 10 is provided with a first lens case (first light guiding member) 11 for guiding light emitted by the light emitting element 21 to the opening part 6 of a case 2, a second lens case (second light guiding member) 12 for guiding the light made incident from the opening part 6 to the light receiving element 22, a first lens 31 provided inside the first lens case 1 for converging the light emitted by the light emitting element 21 and a second lens 32 provided inside the second lens case 12 for converging the light made incident onto the light receiving element 22. In this case, the lens case unit (light guiding unit) 10 is arranged between the case 2 and the light emitting element 21 and the light receiving element 22. |
