Light detecting device

A light detecting device comprising:

• a package having an opening;
• a light transmission section closing the opening;
• a Fabry-Perot interference filter disposed on one side of a first direction with respect to the opening and the light transmission section inside the package, and including a pair of mirror sections having a variable distance from each other in the first direction;
• a light detector disposed on the one side of the first direction with respect to the Fabry-Perot interference filter inside the package;
• a first aperture section having a first aperture located on the other side of the first direction with respect to the opening and the light transmission section outside the package;
• and
• a second aperture section having a second aperture located on the other side of the first direction with respect to the first aperture outside the package,
• wherein a first surface of the first aperture section facing the second aperture side and surrounding the first aperture has light absorbency, and
• a second surface of the second aperture section facing the first aperture side and surrounding the second aperture is separated from the first surface, and has light absorbency.