JP2008071972A5 - - Google Patents

Claims (9)

An image sensor that receives a light beam through a photographing lens ,
A plurality of first pixels for capturing a subject image formed by the photographing lens ;
A plurality of second pixels for performing focus detection of the photographing lens ;
With
The first pixel is
First photoelectric conversion means that is not divided;
A first on-chip lens disposed above the first photoelectric conversion means;
An optical waveguide disposed between the first on-chip lens and the first photoelectric conversion means ;
Have
The second pixel is
A plurality of second photoelectric conversion means divided from each other;
A second on-chip lens disposed above the plurality of second photoelectric conversion means;
Have
The image pickup device , wherein the second pixel does not have an optical waveguide between the second on-chip lens and the second photoelectric conversion means. The first on-chip lens has a larger shape of the opening ratio than the second on-chip lens,
The second on-chip lens according to claim 1, characterized in <br/> that has a shape that the pupil and the plurality of second photoelectric conversion unit of the photographing lens to the imaging relationship The imaging device described in 1. The first on-chip lenses, the top surface is aspherical, and the imaging device according to claim 2, the shape of the opening is characterized in that it is a rectangle. The second on-chip lens, the upper surface is a sphere surface, and an imaging device according to claim 2 or claim 3 shape of the opening is characterized in that it is a circular shape. The image sensor according to claim 1, wherein the first pixel further includes a lens disposed between the first on-chip lens and the optical waveguide. The image pickup device according to claim 5, wherein the optical waveguide also serves as a color filter. The first on-chip lenses, the imaging device according to claim 1, wherein the thicker than the second on-chip lens. The second pixel is
Floating diffusion,
A plurality of transfer switches for transferring signal charges generated by the plurality of second photoelectric conversion means to the floating diffusion unit;
A source follower amplifier that outputs a signal corresponding to the potential of the floating diffusion portion;
The image pickup device according to any one of claims 1 to 7 , further comprising: A taking lens ,
The image pickup device according to any one of claims 1 to 8, wherein the image pickup device receives a light beam through the photographing lens .
Imaging system comprising the.