JPH08265614A - Pupil division type image split image pickup device - Google Patents

Abstract

PURPOSE: To provide an image split image pickup device by which color informa tion is obtained with a simple configuration by forming plural images with different spectral characteristics split by an eccentric optical member and a color filter onto a two-dimensional image pickup element. CONSTITUTION: In an optical system forming a two-dimension image 2 formed by an objective lens 1 onto a two-dimensional image pickup element 4 again by means of an image re-forming lens 3, an eccentric optical member 5 dividing a pupil and each color filter 6 corresponding to each divided pupil are arranged between a position of a two-dimensional image 2 by the objective lens 1 and an image re-forming lens 3. The eccentric optical member 5 divides the aperture of the pupil and is provided with eccentric optical members 5a, 5b and each luminous flux through the divided partial aperture is bent in a different optical path and plural images 8a, 8b are formed to different positions of the two-dimensional images pickup elements 4. Furthermore, each of color filters 6a, 6b with different spectral characteristics are arranged to each partial aperture of the split pupil and plural images 8a, 8b with the different spectral characteristics are formed on the two-dimensional image pickup element 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly to a camera image pickup apparatus using an electronic image pickup device, and more particularly to an image division image pickup apparatus.

[0002]

2. Description of the Related Art A photographing optical system for dividing an image into a plurality of images in an optical path of a re-imaging optical system for re-imaging an image formed by an objective lens and re-imaging the image on an image sensor is disclosed in, for example, Japanese Patent Laid-Open Publication No. 63
Those described in JP-A-276012, JP-A-60-69617, JP-B-2-39763, and JP-A-61-282367 are known.

[0003]

Among the above-mentioned conventional examples, the image pickup apparatus disclosed in Japanese Patent Laid-Open No. 63-276012 uses a three-color separation prism, so that the image pickup elements are attached to the three-color separation prism in mutually different directions. In addition, it is difficult and time-consuming to align the image sensors with high accuracy. Also, as many image pickup elements as the number of images are required. As described above, the mechanical structure and the adjustment are complicated, and there is a drawback that the manufacturing cost becomes high. For details of the three-color separation prism, see "Television and Image Information Engineering Handbook", Chapter 6, Sections 6.1-6.2.
It is described in.

Further, the conventional example described in Japanese Patent Laid-Open No. 60-69617 is a color endoscope apparatus, and as many imaging lenses (relay lenses) as the number of divided images are used. The frame structure becomes complicated.

Further, the conventional example of Japanese Patent Publication No. 2-39763 is a focus detection device for a camera, which uses a line sensor (one-dimensional image pickup element), and an image to be handled is a one-dimensional image, and a color image is also used. It's not for getting images.

Further, the apparatus described in JP-A-61-282367 is a color copying machine and uses a line sensor, and scanning is required to obtain a two-dimensional image. It is for reading originals and cannot be used for general photography.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an image division photographing device which can obtain color information with a simple structure.

[0008]

An image segmentation and photographing apparatus of the present invention comprises an objective lens, and one re-imaging lens for re-imaging a two-dimensional image formed by the objective lens on a two-dimensional image sensor. A plurality of decentering optical elements for dividing the pupil of the optical system including the objective lens and the re-imaging lens, which are arranged between the image forming position of the objective lens and the two-dimensional image pickup element, are provided. An eccentric optical member and a plurality of color filters having different spectral characteristics provided corresponding to each of the eccentric optical elements are provided, and a plurality of images having different spectral characteristics divided by the eccentric optical member and the color filter are formed. It is formed on the two-dimensional image pickup device.

The image segmentation / shooting apparatus of the present invention is an optical system having the structure shown in FIG. 1 and re-imaging the two-dimensional image 2 formed by the objective lens 1 on the two-dimensional image pickup device 4 by the reimaging lens 3. The eccentric optical member 5 for dividing the pupil and the color filter 6 corresponding to the divided pupil are arranged between the position of the two-dimensional image 2 formed by the objective lens 1 and the re-imaging lens 3.
Here, the size of the pupil corresponds to the size of the light beam that passes through the aperture stop of the re-imaging lens 3, and if the actually used range shown in FIG. Core optical member 5
Is an arrangement in which the eccentric optical elements 5a and 5b are arranged by dividing the pupil opening 7, and each of the divided openings is a partial opening. For example, in the case of two divisions, it is divided into partial openings 7a and 7b as shown in FIG. The light fluxes that have passed through the partial openings 7a and 7b are 5a and 5a of the decentering optical member 5.
The two-dimensional image pickup element 4 is bent by b to have different optical paths.
Multiple images at different positions (in FIG. 1, two images 8a, 8
b) is formed. Further, a pupil (partial apertures 7a, 7a) divided between the image forming position of the objective lens 1 and the two-dimensional image pickup device 4 is formed.
The color filter 6 (6a, 6b) corresponding to b) is arranged. This color filter 6 has partial openings 7a and 7b.
Color filters 6a and 6b having different spectral characteristics are arranged for each, and a plurality of images having different spectral characteristics are formed on one two-dimensional image sensor 4. In this way, the two-dimensional image sensor 4 detects the color information of the subject.

As described above, the pupil division type image division image pickup device of the present invention can pick up a plurality of two-dimensional images having different spectral characteristics by one re-imaging lens and one two-dimensional image pickup device. It is possible to capture an image with a simple configuration having a small number of parts.

In the optical system of the present invention, the visual field range of each two-dimensional image is determined by the image forming range of the objective lens, and its contour is not clear and becomes darker toward the periphery of the visual field. Becomes zero. If there is only one image, the image sensor may be arranged in a necessary range so that unnecessary light in the peripheral portion is imaged outside the light receiving surface of the image sensor. However, in the case where a plurality of images are formed as in the image pickup apparatus of the present invention, if the image interval is narrowed to a certain value or more, unnecessary light in the peripheral portion of adjacent images is mixed as shown in FIG. That is, the image forming range (chain line portion) of the objective lens shown in (A) is mixed with other image portions (solid line) on the light receiving surface of the image sensor as shown in (B).

According to the present invention, a visual field mask is arranged at the image forming position of the objective lens so that unnecessary light is not mixed in as shown in FIG. 4, and many images can be efficiently formed on the image pickup device. .

Further, in the optical system of the present invention, the respective image forming positions of the divided light beams formed by the re-imaging lens 3 are displaced in the optical axis direction due to the chromatic aberration of the optical system as shown in FIG. If the deviation of the image formation position exceeds the allowable depth, the image is out of focus. In the case of a color television camera using a three-color separation prism, the problem of misalignment can be solved by arranging the three image pickup devices so as to shift in the optical axis direction in consideration of chromatic aberration. However, in the apparatus of the present invention, since a plurality of images are formed on one image sensor, the above problem cannot be solved by the method of moving the image sensor along the optical axis.

The present invention can be solved by correcting the deviation of the image forming position in the optical axis direction for each optical path of each image corresponding to the color filter. Specifically, as shown in FIG. 6, an optical member for correcting the positional deviation may be arranged at a position where the optical paths of the respective images do not overlap between the image forming position of the objective lens and the two-dimensional image sensor. This makes it possible to form a plurality of unblurred images on a single image sensor. In FIG. 6, (A) shows the deviation amount Δ by changing the thickness of the decentering optical element.
(B) is an example in which the surface of the eccentric optical element is a curved surface, and (C) is an example in which a plane plate is arranged in front of the image position for correction.

Further, in the image taking apparatus of the present invention, when the light amount is adjusted by the aperture stop to divide the pupil of the optical system, the partial aperture is reduced when the ordinary stop is used. It may not be possible to block it. In particular, when the number of pupil divisions is large, the problem of being unable to uniformly block is likely to occur, and it is necessary to devise a division method.

Therefore, in the image taking apparatus of the present invention, it is desirable that the decentering optical member be constructed as described below.

Of the decentered optical members used in the present invention, when the whole set is called a pupil aperture and each of the divided pupils is called a partial aperture, (1) the pupil aperture is a primary Partial apertures divided only in the original direction, (2) All partial apertures are close to one straight line passing through the center of gravity of the pupil aperture, (3) All partial apertures are in contact with the center of gravity of the pupil aperture Is desirable. Among these decentering optical members, the member having the configuration (1) is as shown in FIGS. 7A and 7C, and all the partial openings are arranged in one direction (vertical direction). , (2) has, for example, FIGS. 7 (B), (D),
As shown in (F), all the partial openings are close to the straight line (L _G ) passing through the center of gravity G, and the configuration of (3) is as shown in FIG.
As shown in (B) and (E), the partial openings are located radially with respect to the center of gravity G, so that the partial openings are arranged close to the center of gravity G. FIG. 7G shows the above (1) to (3).
It does not belong to any of the configurations of.

The decentering optical element used in the present invention is shown in FIG.
In the case of the above-mentioned configuration (1) such as (A) and (C), the diaphragm may be narrowed in a direction perpendicular to the dividing direction (the direction in which the partial openings are arranged), and FIGS. In the case of the configuration described in (2) such as D) and (F), it suffices to narrow down in the direction perpendicular to the straight line L _G , and the configuration described in (3) as shown in FIG. 7E. In the case of, the aperture may be reduced by a diaphragm whose diameter changes. That is, in the case of the configuration (1) (partial openings divided in the one-dimensional direction), FIGS.
In the case of (B), the configuration of (2) (the partial opening is close to the straight line passing through the center of gravity), the aperture is changed from FIG. 9 (A) to FIG. 9 (B).
In the case of the configuration (3) (the partial opening is close to the center of gravity), FIG.
It is only necessary to reduce (A) as shown in FIG. 10 (B), and it is preferable to use apertures each having the above function.

As another means for adjusting the amount of light in the optical system, it is desirable that an ND filter for controlling the light transmittance is detachably provided in the optical system of the photographing apparatus of the present invention.

When the light amount is adjusted by the ND filter as described above, the pupil division method is arbitrary and, for example, any of the methods of (A) to (G) of FIG. It is possible to prioritize the workability and the assemblability in the processing and assembling of the shapes of the optical element) and the ND filter. The shutter speed may be changed instead of adjusting the light amount in the optical system.

[0021]

EXAMPLES Next, examples of the photographing apparatus of the present invention will be described.

The first embodiment of the present invention has a constitution as shown in FIG. 11, in which the first surface (r ₁ ) to the 18th surface (r ₁₈ ) are objective lenses and the 19th surface (r ₁₉ ) is an objective lens. Imaging position of the lens,
The 20th surface (r ₂₀ ) to the 21st surface (r ₂₁ ) are decentered optical members,
The 22nd surface (r ₂₂ ) to the 23rd surface (r ₂₃ ) are color filters,
The 24th surface (r ₂₄ ) to the 39th surface (r ₃₉ ) are re-imaging lenses,
The 40th surface (r ₄₀ ) is an image formed by the reimaging lens. Note that the image sensor is shown to the right of r ₄₀ in FIG. Here, FIG. 12 is a diagram showing the configuration of the eccentric optical member 5, which is 15 mm vertically and horizontally, and 5 mm vertically (y direction).
It is divided into rectangular partial openings 12 having a width (x direction) of 3.75 mm. Further, the color filter 6 is also provided with twelve filters having different central wavelengths corresponding to the respective partial openings shown in FIG. Further, FIG. 13 shows the arrangement of the effective light-receiving surface of the image pickup device 4, and the numbers show the image formation positions of the light flux passing through the decentered optical elements having the same numbers.

The lens data of the first embodiment and
The shapes of decentered optical members (each decentered optical element) are shown in the table below.
As shown. First Example Table 1 r₁ = 52.0771 d₁ = 4.6875 n₁ = 1.74400 ν₁ = 44.79 r₂ = 159.9563 d₂ = 0.2083 r₃ = 35.3448 d₃ = 1.8750 n₂ = 1.60311 ν₂ = 60.70 r_Four = 13.3031 d_Four = 6.6667 r_Five = ∞ d_Five = 1.5625 n₃ = 1.60311 ν₃ = 60.70 r₆ = 17.1240 d₆ = 3.1250 r₇ = 59.6375 d₇ = 2.5000 n_Four = 1.51602 ν_Four = 56.80 r₈ = -161.5875 d₈ = 0.2083 r₉ = 28.3688 d₉ = 1.5625 n_Five = 1.77250 ν_Five = 49.60 r_Ten= 16.3969 d_Ten= 11.2500 n₆ = 1.60342 ν₆ = 38.01 r₁₁= -80.6979 d₁₁= 2.7083 r₁₂= -709.3208 d₁₂= 8.2292 n₇ = 1.77250 ν₇ = 49.60 r₁₃= -14.1292 d₁₃= 2.0833 n₈ = 1.69895 ν₈ = 30.12 r₁₄= 44.8073 d₁₄= 3.1250 r_Fifteen= -62.9885 d_Fifteen= 3.1250 n₉ = 1.69680 ν₉ = 55.53 r₁₆= -22.6677 d₁₆= 0.2083 r₁₇= 86.5750 d₁₇= 3.9583 n_Ten= 1.67,000 ν_Ten= 57.33 r₁₈= -61.1521 d₁₈= 39.5899 r₁₉= ∞ (image) d₁₉= D₁ r₂₀= ∞ d₂₀= D₂ n₁₁= 1.51680 ν₁₁= 64.20 r_{twenty one}= ∞ d_{twenty one}= 1.0417 r_{twenty two}= ∞ d_{twenty two}= 3.1250 n₁₂= 1.51633 ν₁₂= 64.15 r_{twenty three}= ∞ d_{twenty three}= 10.4167 r_{twenty four}= 69.0042 d_{twenty four}= 1.4792 n₁₃= 1.60342 ν₁₃= 38.01 r_{twenty five}= 31.9042 d_{twenty five}= 2.1354 r₂₆= 92.6208 d₂₆= 3.5938 n₁₄= 1.72916 ν₁₄= 54.68 r₂₇= -91.5219 d₂₇= 3.0125 r₂₈= 21.9219 d₂₈= 6.4583 n_Fifteen= 1.77250 ν_Fifteen= 49.60 r₂₉= 39.8448 d₂₉= 1.6146 r₃₀= 283.4521 d₃₀= 1.2396 n₁₆= 1.58144 ν₁₆= 40.75 r₃₁= 21.0448 d₃₁= 10.7917 r₃₂= -25.8646 d₃₂= 1.1458 n₁₇= 1.68250 ν₁₇= 44.65 r₃₃= 208.7990 d₃₃= 4.9375 n₁₈= 1.72000 ν₁₈= 46.03 r₃₄= -35.2969 d₃₄= 0.1042 r₃₅= -54.9979 d₃₅= 3.0417 n₁₉= 1.77250 ν₁₉= 49.60 r₃₆= -30.5771 d₃₆= 0.1042 r₃₇= 125.9396 d₃₇= 4.4896 n₂₀= 1.77250 ν₂₀= 49.60 r₃₈= -35.3448 d₃₈= 1.3542 n_{twenty one}= 1.75520 ν_{twenty one}= 27.51 r₃₉= -241.9844  d₃₉= D₃ r₄₀= ∞

Table 2 Thickness (D ₂ ) Center position Standard angle α Angle β XY No. 1 5.72917 1.87500 0 5.70200 -9.11300 No. 2 5.72917 5.62500 0 5.73400 -3.08200 No. 3 2.08333 1.87500 5.00000 0 -9.10000 No. 4 5.72917 5.62500 5.00000 0 -3.10000 No. 5 5.72917 1.87500 -5.00000 -5.70200 -9.11300 No. 6 2.08333 5.62500 -5.00000 -5.73400 -3.08200 No. 7 5.72917 -1.87500 0 5.70200 9.11300 No. 8 2.08333 -5.62500 0 5.73400 3.08200 No. 9 2.08333 -1.87500 5.00000 0 9.10000 No. 10 5.72917 -5.62500 5.00000 0 3.10000 No. 11 5.72917 -1.87500 -5.00000 -5.70200 9.11300 No. 12 2.08333 -5.62500 -5.00000 -5.73400 3.08200

[0025]

Table 4 Image Forming Position on Image Sensor (Center of Screen) XY No. 1 -4.69366 -2.90918 No. 2 -1.55636 -2.90674 No. 3 -4.65324 0.01333 No. 4 -1.56575 0.00422 No. 5 -4.64543 2.86425 No. 6 -1.60298 2.97939 No. 7 4.68064 -2.90134 No. 8 1.56650 -2.92618 No. 9 4.64216 0.01961 No. 10 1.55673 0.00694 No. 11 4.71149 2.91145 No. 12 1.60144 2.98605

[0027] In the above table, Table 1 is the lens data of Example 1 of the optical system shown in FIG. 11, where r ₁ , r ₂ , ... Are the radii of curvature of the respective surfaces,
d ₁ , d ₂ , ... Are the thicknesses and intervals of the respective lenses or optical elements, n ₁ , n ₂ , ... are the refractive indices of the respective lenses or optical elements, and ν ₁ , ν ₂ ,. It is the Abbe number of each lens or optical element. A field lens is arranged near the image position r ₁₉ of the objective lens, if necessary.

Table 2 shows the data of the arrangement position and shape of each decentered optical element used in the optical system for each partial aperture.
1, No. 2, ... Denote the partial openings shown in FIG. 12, and the central coordinate position is also the position shown in FIG. The thickness D ₂ and the inclination angles α and β show the values of D ₂ , α and β shown in FIG.

Table 3 shows the center wavelength of the color filter, N
o. refers to the filter with the number corresponding to the number of the partial opening.

Table 4 shows the image forming position on the image pickup element by the X and Y coordinate values of the image center position on the image forming surface.

Table 5 shows the image forming position (r ₄₀ ) in the optical axis (Z axis) direction by the distance (D ₃ ) from the image side surface of the re-imaging lens system.

In the lens data shown in Table 1, D ₁ and D _{2 respectively} indicate the distance from the image forming position of the objective lens to the decentering optical member and the thickness of the decentering optical member. In Example 1, D ₁ +
D ₂ = 218.0625. The value of D ₂ is as shown in Table 2.

In the first embodiment, the 19th surface (r
_{At the} image forming position of the objective lens of ₁₉ ), 9.6 mm × 9.6
A field mask with a size of mm is arranged. Further, as described above, the 40th surface (r ₄₀ ) is an image forming position by the reimaging lens, and 12 images corresponding to the respective color filters can be formed on the image pickup device. The size of each image is 2.5 mm x 2.5 mm
On the effective light-receiving surface of 9.8 mm × 15.6 mm with
They are arranged as shown in Table 4. Further, the field mask is used to form an image only in a necessary area, and the images can be efficiently arranged without mixing in unnecessary light. The image forming position of each image in the optical axis direction is as shown in Table 5. Each wedge prism is used as an optical member for correcting the deviation of the image forming position, and the thickness of the wedge prism is changed (the thickness D ₂ of the decentering optical element is changed as shown in Table 2).
The amount of deviation is corrected. As a result, the deviation amount is within 0.31 mm as shown in Table 5, that is, in Table 5, the distance from the image side surface of the re-imaging lens to the image is the maximum. No. 9 which is the smallest of 55.2579. 6 of 54.943
It is corrected within the difference from 51. Further, when adjusting the light quantity in the optical system, an ND filter may be used. The decentering optical element may be a decentered lens or a decentered mirror in addition to the wedge prism.

The second embodiment has the same optical system configuration as that of the first embodiment except for the decentering optical member and the color filter. In this embodiment, as shown in FIG. 16, of the pupil openings, an opening having a size of 16 mm × 16 mm is 8 mm × 8.
An eccentric optical member is arranged so as to be divided into four partial openings each having a size of mm, and a color filter is arranged corresponding to this. Tables 6 to 9 below show the arrangement position, shape, center wavelength of the color filter, and the like of this eccentric optical member.

The lens data of Example 2 is the same as that of Table 1, but differs from Example 1 only in that D ₁ + D ₂ = 219.0333. Second embodiment

Table 6 Center position coordinates α angle β XY No.1 4.00000 4.00000 3.15000 -3.95000 No.2 4.00000 -4.0000 -3.15000 -3.95000 No.3 -4.00000 -4.00000 -3.15000 3.95000 No.4 -4.00000 4.00000 3.15000 3.95000

[0037]

Table 8 Image Forming Position on Image Sensor (Center of Screen) XY No. 1 -2.03552 -1.62103 No. 2 -2.01031 1.60086 No. 3 1.99502 1.58739 No. 4 2.01031 -1.60086

[0039] Of the above Tables 6 to 9, Table 6 shows the center coordinates of the decentering optical element, the thickness of the wedge, and decentering data, Table 7 shows the center wavelength of the color filter, and Table 8 shows the result of each image. The image positions are shown in Tables 2 to 3 showing the data of Example 1, respectively.
Same as Table 4.

In the second embodiment, the image position r of the objective lens is
A field mask having a size of 9.2 mm × 2.3 mm is arranged at ₁₉ . The filter used in this example is No.
No. 1 is for obtaining blue information, No. 2 is for green information, No. 3 is for red information, and NO. 4 is for obtaining white or green information. The size of each image by this optical system is 2.4 mm × 3.
It is formed on the effective light receiving surface of 2 mm and 6.4 mm × 8.8 mm as shown in FIG. Further, a visual field mask is provided so that an image can be formed only in a necessary area, and the images can be efficiently arranged without mixing in unnecessary light.

Table 9 shows the image forming position of each image in the optical axis direction in Example 2, and is shown by the distance from the image side surface of the re-imaging lens as in Table 5. From this table, the deviation of the image forming position is 0.16 mm, which is within the allowable range. Therefore, in this embodiment, the optical member for correcting the deviation of the image forming position is not arranged. Further, in this embodiment, the arrangement of each partial opening (each eccentric optical element) of the eccentric optical member is as shown in FIG. 16, and corresponds to FIG. 7 (B). Therefore, the above-mentioned configuration (2) or (3) is obtained, and the amount of light can be adjusted by the diaphragm mechanism of the method shown in FIG.
It is also possible to adjust the light amount using an ND filter.

The pupil division type divided image photographing apparatus of the present invention is not only the invention described in the claims but also the following respective items which achieve the object of the present invention.

(1) In the photographing apparatus described in claim 1, claim 2, or claim 3, a region covered by a plurality of decentering optical elements forming the decentering optical member is a pupil opening, and An imaging apparatus in which each decentering optical element is arranged so as to divide the pupil opening only in one direction when a region covered by the decentering optical element is a partial aperture.

(2) In the photographing apparatus described in claim 1, claim 2 or claim 3, the area covered by the plurality of decentering optical elements is a pupil aperture, and the area is covered by each decentering optical element. An imaging apparatus in which each eccentric optical member is arranged such that all partial apertures are close to a straight line passing through the center of gravity of the pupil aperture when the region is defined as a partial aperture.

(3) In the photographing apparatus according to the first, second or third aspect of the present invention, the area covered by the plurality of decentering optical members is a pupil opening and is covered by each decentering optical element. An imaging apparatus in which each eccentric optical member is arranged so that all partial openings are close to the center of gravity of the pupil opening when the area is a partial opening.

(4) A photographing apparatus according to any one of claims 1, 2, and 3, wherein an ND filter for adjusting a light amount is removably arranged in an optical path of the photographing apparatus.

[0047]

According to the present invention, it is possible to realize an image division photographing device which can obtain color information with a simple structure.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a photographing apparatus of the present invention.

FIG. 2 is a diagram showing a pupil opening.

FIG. 3 is a diagram showing an image forming range and a necessary image range on a light receiving surface of an objective lens and an image pickup element.

FIG. 4 is a diagram showing an image forming range and a necessary image range on an objective lens and a light receiving surface when a field stop is used.

FIG. 5 is a diagram showing an image shift when an eccentric optical member is used.

FIG. 6 is a view showing a means for correcting the image shift.

FIG. 7 is a diagram showing an example of a pupil division method.

FIG. 8 is a diagram showing an example of a narrowing method using a diaphragm.

FIG. 9 is a diagram showing another example of a narrowing method using a diaphragm.

FIG. 10 is a diagram showing another example of a narrowing method using a diaphragm.

FIG. 11 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 12 is a diagram showing an arrangement of decentering optical members used in Embodiment 1 of the present invention.

FIG. 13 is a diagram showing the position of an image in the first embodiment.

FIG. 14 is a view showing the shape of an eccentric optical member.

FIG. 15 is a diagram showing a coordinate system that represents an inclination angle of an eccentric optical member.

FIG. 16 is a view showing the arrangement of decentering optical members used in Example 2 of the present invention.

FIG. 17 is a diagram showing the position of an image in Example 2 described above.

Claims (3)

[Claims] 1. An objective lens, one re-imaging lens for re-imaging a two-dimensional image formed by the objective lens on a two-dimensional imaging device, an imaging position of the objective lens, and the two-dimensional imaging device. And an eccentric optical member provided with a plurality of eccentric optical elements for dividing the pupil of an optical system including the objective lens and the re-imaging lens, and each of the eccentric optical elements. An image pickup device that is provided with a plurality of color filters having different spectral characteristics that are provided correspondingly, and that forms a plurality of images with different spectral characteristics that are divided by the eccentric optical member and the color filter on the two-dimensional image sensor. apparatus. 2. The image pickup apparatus according to claim 1, wherein a field mask is arranged at an image forming position of the objective lens. 3. An optical member for correcting a shift of an image forming position of an optical system of each image corresponding to each color filter is arranged between the image forming position of the objective lens and the two-dimensional image pickup device. The image pickup apparatus according to claim 1.