JP6990101B2 - Image sensor - Google Patents

Description

The present invention relates to an image pickup device, and more particularly to an image pickup device in which a decrease in light collection rate is improved in a peripheral portion of an image pickup area.

In recent years, conventional image pickup devices such as CCD (Charged-coupled devices) type image sensors and CMOS (Complementary metal-oxide-semiconductor) type image sensors have been used as image pickup devices. The size and the number of pixels are increasing, and at the same time, the pixel size is becoming smaller and smaller. In such a reduction in pixel size, the light receiving sensitivity in the light receiving unit, which is one of the basic performances of the image pickup apparatus, is lowered, so that it becomes difficult to take a clear image in a place where the illuminance is low. Therefore, it has been enthusiastically studied to improve the light receiving sensitivity per unit pixel. For example, in order to improve the light-collecting efficiency of each light-receiving part, a microlens, which is a convex lens for light-collecting, is provided on each light-receiving part.

Further, various inventions have been made so that the focusing rate of such a microlens is uniform over the entire imaging area. The most common method described above is to optimize (scale) the position of the microlens with respect to the pixel aperture. Here, scaling is a method for improving the decrease in the focusing rate in the peripheral portion of the imaging area, which is caused by the incident angle of the image light incident through the camera lens being different between the central portion and the peripheral portion of the imaging area of the imaging element. This is a method of arranging the pixels in the peripheral portion of the imaging area by adjusting the positions of the aperture center and the microlens center so as to be optimum with respect to the incident angle of light (see Patent Documents 1 and 2).

On the other hand, as a method proposed for the purpose of improving the resolution of the camera, there is a method of arranging pixels two-dimensionally in an oblique direction. This has been proposed as a pre-process type or honeycomb type image pickup sensor (see Patent Documents 3 to 4).

Japanese Unexamined Patent Publication No. 2000-349268 (published on December 15, 2000) Japanese Unexamined Patent Publication No. 2010-02438 (published on March 18, 2010) Japanese Unexamined Patent Publication No. 5-326913 (published on December 10, 1993) JP-A-2007-306490 (published on November 22, 2007)

However, in the conventional area sensor in which the pixel cells are two-dimensionally arranged diagonally with respect to the imaged angle of view area, the focusing rate in the peripheral portion of the imaged area is even if the conventional scaling method of the microlens arrangement is used. There is a problem that it cannot be improved efficiently.

In order to solve the above problem, in the image pickup lens according to one embodiment of the present invention, a plurality of lenses arranged in a two-dimensional manner are arranged in a two-dimensional manner to generate a signal charge in an amount corresponding to the amount of incident light from the subject by photoelectric conversion. A light receiving portion, a layer including a plurality of opening regions and a plurality of light shielding portion regions arranged on the subject side of the light receiving portion, and a microlens formed on each subject side of the plurality of opening regions. , The two-dimensional arrangement direction has an inclination with respect to the horizontal and vertical directions of the imaging angle of view, and the center of the microlens of the microlens and the opening region thereof. The amount of deviation from the center of the opening region is set to be larger in the peripheral portion than in the central portion of the imaging area, and the imaging angle of view is larger than that of the microlens in the horizontal and vertical directions with respect to the center of the imaging angle of view. The amount of deviation of the microlens in the oblique direction with respect to the center is set to be large, and the amount of deviation pitch between the center of the microlens of the microlens and the center of the opening region of the opening region is the imaging angle of view. It is set to gradually increase from the horizontal and vertical directions to the diagonal direction .

In order to solve the above problem, in the image pickup device according to another embodiment of the present invention, the image pickup element is arranged in a two-dimensional shape in which an amount of signal charge corresponding to the amount of incident light from the subject is generated by photoelectric conversion. A plurality of light receiving portions, a layer including a plurality of opening regions and a plurality of light shielding portion regions arranged on the subject side of the light receiving portion, and a color formed on each subject side of the plurality of opening regions. An image pickup element including a filter, wherein the two-dimensional arrangement direction has an inclination with respect to the horizontal and vertical directions of the image pickup angle of view, and the color filter center and the opening portion of the color filter. The amount of deviation from the center of the opening of the region is set to be larger in the peripheral portion than in the center of the imaging area, and the imaging is performed more than the color filters in the horizontal and vertical directions with respect to the center of the imaging angle of view. The amount of deviation of the color filter in the diagonal direction with respect to the center of the angle of view is set to be large, and the amount of deviation pitch between the center of the color filter of the color filter and the center of the opening region of the opening region is captured. The angle of view is set to gradually increase from the horizontal and vertical directions to the diagonal direction .

According to one embodiment of the present invention, it is possible to obtain a good image with a small difference in focusing rate over the entire imaging area.

It is a figure which shows the appearance that the microlenses of the image pickup device in this invention are arranged diagonally two-dimensionally with respect to the total image pickup angle of view. It is a schematic diagram which shows the structure of the image pickup element in FIG. It is an enlarged view which shows the appearance that the microlenses are two-dimensionally arranged in the region shown by the alternate long and short dash line in FIG. 1 regarding the image pickup device in this invention. FIG. 3 is a diagram showing the positional relationship between the incident light in the A-B direction of FIG. 3, the opening region of the B light receiving portion, and the microlens from the cross-sectional direction. FIG. 3 is a diagram showing the positional relationship between the incident light in the AC direction of FIG. 3, the opening region of the C light receiving portion, and the microlens from the cross-sectional direction. It is a figure which shows the image pickup image example of the image pickup element which microlenses are arranged two-dimensionally in this invention. It is a schematic diagram which shows the structure of the image pickup element which comprises the color filter in this invention. It is an enlarged view which shows the appearance that the color filters in this invention are arranged two-dimensionally. FIG. 8 is a diagram showing the positional relationship between the incident light in the AB direction of FIG. 8, the opening region of the B light receiving portion, the color filter, and the microlens from the cross-sectional direction. FIG. 8 is a diagram showing the positional relationship between the incident light in the AC direction of FIG. 8, the opening region of the C light receiving portion, the color filter, and the microlens from the cross-sectional direction. It is a figure which shows the appearance that the microlenses of the image pickup element in the comparative example are arranged diagonally two-dimensionally with respect to the total image pickup angle of view. It is an enlarged view which shows the appearance that the microlenses are two-dimensionally arranged in the region shown by the alternate long and short dash line of FIG. 11 with respect to the image pickup element in the comparative example. 12 is a diagram showing the positional relationship between the incident light in the A ″ -B ″ direction of FIG. 12, the opening region of the B ′ light receiving portion, and the microlens from the cross-sectional direction. 12 is a diagram showing the positional relationship between the incident light in the A ″ -C ″ direction of FIG. 12, the opening region of the C ′ light receiving portion, and the microlens from the cross-sectional direction. It is a figure which shows the image pickup image example of the image pickup element which microlenses are arranged two-dimensionally in the comparative example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
This embodiment will be described with reference to FIGS. 1 to 6. The image pickup device 1 in this embodiment is used, for example, in an image pickup device.

FIG. 1 is a diagram showing a state in which the light receiving units 100 are arranged diagonally two-dimensionally with respect to the entire image pickup angle of view in the image pickup device 1 in the present embodiment. FIG. 2 shows the configuration of the image pickup device 1 in FIG. 1, and is a schematic view of the image pickup device 1 as viewed from the cross-sectional direction.

As shown in FIGS. 1 and 2, the image pickup device 1 includes a light receiving layer 10, an aperture layer 20, and a microlens layer 30. In particular, as shown in FIG. 2, the light receiving layer 10, the aperture layer 20, and the microlens layer 30 are arranged in the order from bottom to top (from the back side to the front side in FIG. 1) in the coordinate axis Z direction. In FIG. 2, the upward direction is the subject side.

The light receiving layer 10 is configured by two-dimensionally arranging a plurality of individual light receiving elements (light receiving units 100) that generate signal charges in an amount corresponding to the amount of incident light from the subject by photoelectric conversion. Here, the light receiving element may be made of, for example, a photodiode.

The opening layer 20 includes a plurality of opening regions 20A and a plurality of light-shielding portion regions 20B, and is arranged on the subject side of the light receiving layer 10.

In the microlens layer 30, microlenses are formed on each subject side of the plurality of opening regions 20A.

In addition, one light receiving part, an opening corresponding to the light receiving part, and a microlens corresponding to the said opening are collectively referred to as a pixel cell. Further, as an example, a pixel cell formed into a square is referred to as a square pixel. In this embodiment, a square pixel will be described as an example, but the shape of the pixel is not limited to a square and may be a rectangle.

FIG. 3 is an enlarged view showing how the microlenses 30A formed on the microlens layer 30 in the present embodiment are two-dimensionally arranged.

The solid line portion in FIG. 3 indicates the opening region 20A, and the dotted line portion indicates the microlens 30A. Further, reference numeral 20AC is the center of the opening region of the opening region 20A, and reference numeral 30AC is the center of the microlens of the microlens 30A.

As shown in FIG. 3, in the image pickup element 1 in the present embodiment, the two-dimensional arrangement directions of the opening region 20A and the microlens 30A are the horizontal and vertical directions of the image pickup angle of view, similarly to the light receiving portion 100. Has a tilt.

Further, as shown in FIG. 3, the amount of deviation between the microlens center 30AC of the microlens 30A and the opening region center 20AC of the opening region 20A is set to be larger in the peripheral portion than in the imaging area center portion. There is.

Further, as shown in FIG. 3, the amount of deviation between the microlens center 30AC of the microlens 30A and the opening region center 20AC of the opening region 20A is larger in the oblique direction than in the horizontal and vertical directions of the imaging angle of view. It is set to be.

FIG. 4 shows the positions of the incident light IL-AB in the AB direction of FIG. 3, the opening region 20A-B of the light receiving portion located in the AB direction, and the microlens 30AB located in the AB direction. It is a figure which showed the relationship from the cross-sectional direction. FIG. 5 is a diagram showing the positional relationship between the incident light IL-AC in the direction AC of FIG. 3, the opening region 20A-C of the C light receiving portion, and the microlens 30AC from the cross-sectional direction.

As shown in FIGS. 4 to 5, since the point C is farther from the center of the imaging area as compared with the point B, the incident light IL-AC is incident at a more oblique angle. Further, the length of the opening region 20A-C in the incident light IL-AC direction at the point C is 1 / √2 times longer than the length of the opening region 20A-B in the incident light IL-AB direction at the point B. small.

However, the position of the microlens 30AC at point C and the deviation amount (δ2) of the opening region 20A-C are set to be larger than the deviation amount (δ1) between the position of the microlens 30AB at point B and the opening region 20A-B. Has been done. The obliquely incident light IL-AC incident on the microlens 30AC at the point C can be focused near the center of the opening region 20A-C. That is, even in a region far from the center of the imaging area, imaging can be performed without a large difference between the focusing rate in the vertical and horizontal directions and the focusing rate in the oblique maximum 45 degree direction.

An example of such a captured image is shown in FIG. 6 below.

FIG. 6 is a diagram showing an example of an image captured by an image pickup device in which microlenses are two-dimensionally arranged in the present embodiment. As shown in FIG. 6, even in the peripheral portion of the imaging area, there is no large difference between the light collection rate in the vertical and horizontal directions and the light collection rate in the diagonal maximum 45 degree direction.

With the above configuration, in the image pickup element 1 having a microlens configuration obliquely arranged two-dimensionally with respect to the image pickup angle of view, the positions of the microlens 30 and the aperture region 20 are horizontal to the center of the image pickup angle of view. And by making the amount of deviation of the microlens oblique to the center of the imaged angle of view larger than that of the microlens in the vertical direction, it is possible to obtain a good image with a small difference in focusing rate over the entire imaging area.

Further, in addition to the above configuration, the amount of deviation pitch between the microlens center 30AC of the microlens 30 and the opening region center 20AC of the opening region 20A gradually increases from the horizontal and vertical directions of the imaging angle of view to the oblique direction. It is preferable that it is set to be.

More specifically, in the image pickup element 1 in the present embodiment, the center of the aperture region and the center of the microlens in the peripheral portion of the image pickup are more closely aligned with each other than the amount of deviation between the center of the aperture region and the center of the microlens at the center of the image pickup angle. The amount of deviation is set to be larger, and it is preferable that the amount of deviation pitch between the center of the aperture region and the center of the microlens is set to be larger in the oblique direction than in the horizontal and vertical directions.

Here, in the present specification, the deviation amount is an amount with respect to a unit pixel, and the deviation pitch amount is an amount that defines the regularity of the deviation amount with respect to a plurality of pixels (in other words, the change in the deviation amount with respect to a plurality of pixels). be.

With the above configuration, the object of the present invention can be achieved more easily.

Further, in addition to the above configuration, it is preferable that the plurality of light receiving units 100 have an inclination of 45 degrees with respect to the horizontal and vertical directions of the imaging angle of view.

With this configuration, the amount of deviation between the microlens center 30AC of the microlens 30 and the opening region center 20AC of the opening region 20A can be maximized, so that the object of the present invention can be more easily achieved.

In the above description, the light collection rate is improved mainly by shifting the position of the microlens and scaling as described above, but this is not limited to the present embodiment, and the aperture region and the aperture region thereof are not limited to this. Scaling may be performed by shifting the position of the corresponding light receiving element in the direction opposite to the shifting direction of the microlens described above. Even with such a configuration, the light collection rate can be improved.

[Second Embodiment]
Hereinafter, the image pickup device 1a having the color filter according to the present embodiment will be described with reference to FIGS. 7 to 10. In the following description, the same members as those already described will be designated by the same reference numerals, and the description thereof will be omitted.

The color filter according to the present embodiment can be designed to transmit light having an arbitrary wavelength of visible light, an arbitrary wavelength of infrared light, or an arbitrary wavelength of ultraviolet light. The specific wavelength of the light transmitted through the color filter does not limit the present embodiment.

FIG. 7 is a schematic diagram showing the configuration of the image pickup device 1a including the color filter layer 40 in the present embodiment. As shown in FIG. 7, the image pickup device 1a according to the present embodiment includes a color filter layer 40 between the aperture layer 20 and the microlens layer 30.

FIG. 8 is an enlarged view showing a state in which the color filters 40A formed on the color filter layer 40 in the present embodiment are two-dimensionally arranged. As shown in FIG. 8, in the image pickup element 1a, the two-dimensional arrangement directions of the opening region 20A and the color filter 40A have an inclination with respect to the horizontal and vertical directions of the imaging angle of view. Correspondingly, the image sensor 1a includes light receiving units 100 arranged with inclinations with respect to the horizontal and vertical directions of the imaging angle of view, as in the first embodiment.

As described above, the image pickup device 1a according to the present embodiment has a plurality of light receiving units 100 arranged in a two-dimensional manner for generating a signal charge in an amount corresponding to the amount of incident light from the subject by photoelectric conversion, and the light receiving light. An opening layer 20 including a plurality of opening regions and a plurality of light-shielding region regions arranged on the subject side of the portion, and a color filter 40A formed on the subject side of each of the plurality of opening regions in the following order. It is equipped with a microlens 30A.

Further, as shown in FIG. 8, the amount of deviation between the color filter center 40AC of the color filter 40A and the opening region center 20AC of the opening region 20A is set to be larger in the peripheral portion than in the imaging area center portion. There is.

Further, as shown in FIG. 8, the amount of deviation between the color filter center 40AC of the color filter 40A and the opening region center 20AC of the opening region 20A is larger in the oblique direction than in the horizontal and vertical directions of the imaging angle of view. It is set to be.

Although not explicitly shown in FIG. 8, the image pickup device 1a according to the present embodiment includes a microlens 30A arranged in the same manner as in the first embodiment. That is, also in the image pickup device 1a according to the present embodiment, the amount of deviation between the microlens center 30AC of the microlens 30A and the aperture region center 20AC of the aperture region 20A is larger in the peripheral portion than in the image pickup area center portion. The amount of deviation between the microlens center 30AC of the microlens 30A and the opening region center 20AC of the aperture region 20A is set to be larger in the oblique direction than in the horizontal and vertical directions. ..

9 shows the positional relationship between the incident light IL-AB in the AB direction of FIG. 8, the opening region 20A-B of the light receiving portion arranged in the AB direction, the color filter 40AB, and the microlens 30AB. Is shown from the cross-sectional direction. FIG. 10 shows the positional relationship between the incident light IL-AC in the AC direction of FIG. 8, the opening region 20A-C of the light receiving portion arranged in the AC direction, the color filter 40AC, and the microlens 30AC. Is shown from the cross-sectional direction.

As shown in FIGS. 9 to 10, since the point C is farther from the center of the imaging area as compared with the point B, the incident light IL-AC is incident at a more oblique angle. Further, the length of the opening region 20A-C in the incident light IL-AC direction at the point C is 1 / √2 times longer than the length of the opening region 20A-B in the incident light IL-AB direction at the point B. small.

However, the deviation amount (δ4, δ2') between the position of the color filter 40AC and the microlens 30AC at the point C and the opening area 20A-C is the deviation between the position of the color filter 40AB at the point B and the opening area 20A-B. It is set larger than the amount (δ3, δ1'). The obliquely incident light IL-AC incident on the color filter 40AC at the point C can be incident on the vicinity of the center of the opening region 20A-C. That is, even in a region far from the center of the imaging area, imaging can be performed without a large difference between the focusing rate in the vertical and horizontal regions and the incident rate of light in the oblique maximum 45 degree direction.

Even with the above configuration, the effect of the first embodiment can be achieved.

Further, in addition to the above configuration, the plurality of light receiving units 100 have an inclination of 45 degrees with respect to the horizontal and vertical directions of the imaging angle of view.

With this configuration, the amount of deviation between the color filter center of the color filter and the opening region center of the opening region can be maximized, so that the object of the present invention can be more easily achieved.

In the above description, the light collection rate is improved mainly by shifting and scaling the positions of the microlens and the color filter as described above, but this does not limit the present embodiment and is not limited to the opening. Scaling may be performed by shifting the position of the region and the corresponding light receiving element in the direction opposite to the shifting direction of the microlens and the color filter lens described above. Even with such a configuration, the light collection rate can be improved.
[Third Embodiment]
Although the image pickup element provided with the microlens and the image pickup element provided with the color filter have been described above, the image pickup element provided with the color filter without the microlens may be configured.

That is, the image sensor 1b (not shown) has a plurality of light receiving units arranged in a two-dimensional manner that generate a signal charge in an amount corresponding to the amount of incident light from the subject by photoelectric conversion, and the light receiving unit on the subject side. An image pickup device comprising an arranged layer including a plurality of opening regions and a plurality of light-shielding regions, and a color filter formed on each subject side of the plurality of opening regions. The two-dimensional arrangement direction has an inclination with respect to the horizontal and vertical directions of the image pickup angle of view, and the amount of deviation between the color filter center of the color filter and the opening area center of the opening area is the image pickup. It is set to be larger in the peripheral portion than in the central portion of the area, and is set to be larger in the oblique direction than in the horizontal and vertical directions at the image sensor angle.

In this case, as compared with the configuration of the first embodiment, the configuration is such that the microlens is replaced by a color filter, and therefore detailed description thereof will be omitted.

Even with the above configuration, the same effect as that of the above embodiment can be obtained.

For comparison, the configurations and effects of the comparative examples will be described below.

<Comparison example>
Hereinafter, a comparative example according to the present embodiment will be described with reference to FIGS. 11 to 15.

FIG. 11 is a diagram showing a state in which the light receiving portions 100C of the image pickup device 1C in the comparative example are arranged diagonally two-dimensionally with respect to the entire image pickup angle of view. FIG. 12 is an enlarged view showing how the microlenses in the comparative example are arranged two-dimensionally.

FIG. 13 shows the incident light IL-AB in the A''-B'' direction of FIG. 12, the opening region 20A-B of the light receiving portion arranged in the A''-B'' direction, and the microlens 30AB. It is a figure which showed the positional relationship of. 14 shows the incident light IL-AC in the A''-C'' direction of FIG. 12, the opening region 20A-C of the light receiving portion arranged in the A''-C'' direction, and the microlens AC. It is a figure which showed the positional relationship of.

As shown in FIGS. 13 to 14, since the C'point is farther from the center of the imaging area as compared with the B'point, the incident light IL-AC is incident at a more oblique angle.

However, the length of the opening region 20A-C in the incident light IL-AC direction at the C'point is 1 / √ than the length of the opening region 20A-B in the incident light IL-AB direction at the B'point. Twice as small.

Therefore, although the incident light IL-AC is incident at a more oblique angle at the C'point than at the B'point, the length of the opening region 20A-C in the incident light IL-AC direction is smaller than C. 'The light collection rate at the point will be greatly deteriorated.

In such a case, the captured image has a good vertical and horizontal focusing rate to some extent in a region away from the center of the imaging area, but the focusing rate is very deteriorated in a region having a maximum diagonal angle of 45 degrees. It becomes.

Such a captured image is shown in FIG.

FIG. 15 is a diagram showing an example of an image captured by an image pickup device in which microlenses are two-dimensionally arranged in a comparative example.

As shown in FIG. 15, such an image pickup state results in a very uncomfortable captured image, and the image quality of the camera is significantly deteriorated.

In comparison with this comparative example, according to the configuration according to each of the above-described embodiments, even in the microlens arranged in the direction of up to 45 degrees from the center of the imaging area, the oblique light incident on the microlens is also the center of the opening region. The light is focused in the vicinity, and deterioration of sensitivity can be prevented even in such a peripheral microlens. That is, it is possible to obtain a good image without causing a large difference in focusing rate as in the conventional case in the entire imaging area.

〔summary〕
The image pickup device according to the first aspect of the present invention has a plurality of light receiving units arranged in a two-dimensional manner for generating a signal charge in an amount corresponding to the amount of incident light from the subject by photoelectric conversion, and the subject side of the light receiving unit. An image pickup device comprising a layer including a plurality of aperture regions and a plurality of light-shielding regions, and microlenses formed on the subject side of each of the plurality of aperture regions, which are arranged in the image sensor. The two-dimensional arrangement direction has an inclination with respect to the horizontal and vertical directions of the image pickup angle of view, and the amount of deviation between the lens center of the microlens and the center of the aperture region is the center of the image pickup area. It is set to be larger in the peripheral portion than in the horizontal direction, and is set to be larger in the oblique direction than in the horizontal and vertical directions of the image pickup angle.

According to the above aspect, in an image pickup element having a microlens unit configuration obliquely arranged two-dimensionally with respect to the image pickup angle of view, the positions of the microlens and the aperture region are horizontal with respect to the center of the image pickup angle and By making the amount of deviation of the microlens oblique to the center of the imaged angle of view larger than that of the microlens in the vertical direction, it is possible to obtain a good image with a small difference in focusing rate over the entire imaging area.

The image pickup device according to the second aspect of the present invention is the image pickup device according to the first aspect, and the amount of deviation pitch between the microlens center of the microlens and the opening region center of the aperture region is the image pickup image. The angle may be set to gradually increase from the horizontal and vertical directions to the diagonal direction.

According to the above aspect, the object of the present invention can be achieved more easily.

The image pickup device according to the third aspect of the present invention is the image pickup device according to the above aspect 1 or 2, and may further include a layer having a color filter between the layer and the microlens. ..

According to the above aspect, the same effect can be obtained in the above mode.

The image pickup device according to the fourth aspect of the present invention is the image pickup device according to the above aspect 1 or 2, and the plurality of light receiving units have an inclination of 45 degrees with respect to the horizontal and vertical directions of the image pickup angle of view. You may be doing it.

According to the above aspect, the amount of deviation between the center of the microlens of the microlens and the center of the opening region of the opening region can be maximized, so that the object of the present invention can be more easily achieved.

The image pickup device according to the fifth aspect of the present invention has a plurality of light receiving units arranged in a two-dimensional manner for generating a signal charge in an amount corresponding to the amount of incident light from the subject by photoelectric conversion, and the subject side of the light receiving unit. An image pickup device comprising a layer including a plurality of opening regions and a plurality of light-shielding regions, and a color filter formed on each subject side of the plurality of opening regions. The two-dimensional arrangement direction has an inclination with respect to the horizontal and vertical directions of the image pickup angle, and the amount of deviation between the color filter center of the color filter and the opening region center of the opening region is determined. It is set to be larger in the peripheral portion than the central portion of the image pickup area, and is set to be larger in the oblique direction than in the horizontal and vertical directions of the image pickup angle.

According to the above aspect, the same effect can be obtained in the above mode.

1, 1a, 1b, 1C Image sensor 10 Light receiving layer 100, 100C Light receiving part 20 Aperture layer 20A Aperture area 20AC Aperture area center 20B Light shielding part area 30 Micro lens layer (micro lens)
30AC microlens center 40 color filter layer (color filter)
40AC color filter center δ deviation amount IL incident light

Claims (4)

A plurality of two-dimensionally arranged light receiving units that generate a signal charge in an amount corresponding to the amount of incident light from the subject by photoelectric conversion, and
A layer including a plurality of opening regions and a plurality of light-shielding regions arranged on the subject side of the light-receiving portion,
An image pickup device comprising a microlens formed on each subject side of the plurality of openings regions.
The two-dimensional arrangement direction has an inclination with respect to the horizontal and vertical directions of the imaging angle of view.
The amount of deviation between the center of the microlens of the microlens and the center of the opening region of the opening region is
It is set to be larger in the peripheral part than in the central part of the imaging area, and
The amount of deviation of the microlens in the oblique direction with respect to the center of the imaged angle of view is set to be larger than that of the microlens in the horizontal and vertical directions with respect to the center of the imaged angle of view.
The feature is that the amount of deviation pitch between the center of the microlens of the microlens and the center of the opening region of the aperture region is set so as to gradually increase from the horizontal and vertical directions of the image pickup angle to the oblique direction. Image sensor. The image pickup device according to claim 1 , further comprising a layer having a color filter between the layer and the microlens. The image pickup device according to claim 1 , wherein the plurality of light receiving units have an inclination of 45 degrees with respect to the horizontal and vertical directions of the image pickup angle. A plurality of two-dimensionally arranged light receiving units that generate a signal charge in an amount corresponding to the amount of incident light from the subject by photoelectric conversion, and
A layer including a plurality of opening regions and a plurality of light-shielding regions arranged on the subject side of the light-receiving portion,
An image pickup device including a color filter formed on each subject side of the plurality of opening regions.
The two-dimensional arrangement direction has an inclination with respect to the horizontal and vertical directions of the imaging angle of view.
The amount of deviation between the center of the color filter of the color filter and the center of the opening region of the opening region is
It is set to be larger in the peripheral part than in the central part of the imaging area, and
The amount of deviation of the color filter in the diagonal direction with respect to the center of the imaged angle of view is set to be larger than that of the color filter in the horizontal and vertical directions with respect to the center of the imaged angle of view.
The feature is that the amount of deviation pitch between the center of the color filter of the color filter and the center of the opening region of the opening region is set so as to gradually increase from the horizontal and vertical directions of the image pickup angle to the diagonal direction. Image sensor.

Images