Solid state image sensor with protection against certain incident light

A solid state image sensor, comprising:

• a substrate;
• a plurality of pixels, each having a photoelectric conversion section formed in said substrate and a light-receiving section formed on the side of a light-receiving surface of said substrate, at least some of said plurality of pixels being ranging pixels, the photoelectric conversion section and the light-receiving section of each of said ranging pixels arranged to define a central line passing a center of the photoelectric conversion section and extending perpendicularly to said substrate through the photoelectric conversion section and the light-receiving section;
• and
• the light-receiving section of each of said ranging pixels comprising a filter having periodically arranged high and low permittivity sections, said filter being adapted to reflect incident light getting into the inside of said light-receiving section at a specific incident angle, wherein
• the solid state image sensor comprises a pair of ranging pixels arranged such that the normal line of the filter and the principal ray of the incident flux of light striking the filter represent a same angle of inclination but are inclined in opposite directions in each of the ranging pixels and outputs a signal for a ranging operation, using the signals from said pair of ranging pixels, and
• said filter is configured so as to respectively define first and second normal lines to the filter at first and second points thereof within a plane including the central line such that the first and second points are arranged on opposite sides relative to the central line, the first and second normal lines being parallel and inclined at an angle relative to a principal ray of a flux of light entering said filter.