Photoelectric conversion device

A photoelectric conversion device comprising:

• a circuit board comprising an upper surface and a lower surface opposite to the upper surface;
• a first light emitting module;
• a first light receiving module;
• a second light emitting module;
• a second light receiving module, the first and second light emitting modules and the first and second light receiving modules mounted on the upper surface and being apart from each other;
• and
• an optical coupling member comprising a light incident surface facing toward the first and second light emitting modules and the first and second light receiving modules, a first reflection surface obliquely connected to the light incident surface, a first converging lens, a second converging lens, a third converging lens, a fourth converging lens, a second reflection surface, and a third reflection surface, the first, second, third and fourth converging lenses formed on the light incident surface and being apart from each other, the first reflection surface defining a recess, the second and third reflection surfaces arranged in the recess and perpendicularly connected to each other, the third converging lens optically coupled to the second light emitting module and configured to direct light from the second light emitting module to the second reflection surface, the second reflection surface configured to reflect the light from the third converging lens to the third reflection surface, the fourth converging lens optically coupled to second light receiving module and configured to direct the light from the third reflection surface to the second light receiving module.