Light detection device, light detection system, lidar device, mobile body, inspection method, and method for manufacturing semiconductor device

A light detection device, comprising:

• a first region including
• a plurality of first semiconductor light detection elements, and
• a plurality of first lenses respectively located on the plurality of first semiconductor light detection elements;
• a second region including a plurality of second semiconductor light detection elements, no lens being located directly above the plurality of second semiconductor light detection elements at a position in a first direction of the plurality of first lenses, the first direction being from one of the plurality of first semiconductor light detection elements toward one of the plurality of first lenses;
• a first electrode electrically connected with the plurality of first semiconductor light detection elements;
• and
• a second electrode electrically connected with the plurality of second semiconductor light detection elements,
• wherein
• the first electrode and the second electrode are pad electrodes and are separated from each other,
• the first electrode and the second electrode are configured to provide mutually different output signals independently from each other,
• the first electrode is configured to output a first signal corresponding to a number of the plurality of first semiconductor light detection elements, and
• the second electrode is configured to output a second signal corresponding to a number of the plurality of second semiconductor light detection elements.