| 摘要 |
A solid state image sensor has a plurality of ranging pixels on the imaging area thereof and each of the ranging pixels has a photoelectric conversion section and an optical waveguide arranged at the light-receiving side of the photoelectric conversion section. The optical waveguide has at least two optical waveguides including a first optical waveguide arranged at the light-receiving side and a second optical waveguide arranged at the side of the photoelectric conversion section in the direction of propagation of light. The core region of the first optical waveguide shows a refractive index lower than the refractive index of the core region of the second optical waveguide and is designed so as to show a high light-receiving sensitivity relative to light entering at a specific angle.
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