JP2012242488A - Imaging device, stereoscopic imaging optical system and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging device which can record a stereoscopic image with high image quality.SOLUTION: The imaging device includes: an imaging element; a first imaging optical system for rotating a right parallax image and a left parallax image to a first area and a second area different from the first area in the imaging element respectively, and performing image formation; image signal read out means for reading out a right parallax image signal from the first area of the imaging element and reading out a left parallax image signal from the second area; image processing control means for rotating the right parallax image signal and the left parallax image signal read out from the imaging element; and image recording means for recording the right parallax image signal and the left parallax image signal rotated by the image processing control means, on a recording medium.

Description

  The present invention relates to an imaging apparatus including an optical system for stereoscopic imaging.

  2. Description of the Related Art Conventionally, there has been proposed an imaging apparatus that can capture both a stereoscopic image having left and right parallax and a normal two-dimensional image using a single imaging element. For example, Patent Document 1 discloses an imaging apparatus that switches between capturing a stereoscopic image and a two-dimensional image by mounting an optical adapter that compresses an image in the left-right direction in an imaging apparatus including an imaging optical system and an imaging element. Has been. Patent Document 2 discloses an imaging apparatus that arranges a mirror that separates a light beam on the object side of an imaging optical system and captures an image by temporally switching between a left parallax image and a right parallax image.

JP 07-274214 A JP 2000-19663 A

  However, in the prior art disclosed in Patent Document 1, when the left and right images are compressed, the number of pixels when the images are read out is reduced by half and the image deteriorates. In addition, when the method of switching and imaging in time disclosed in Patent Document 2 is used, the shutter speed cannot be made faster than the reading time of the image sensor, so that the imaging conditions are limited.

  Therefore, the present invention provides an imaging apparatus capable of recording a stereoscopic image with high image quality.

  An imaging apparatus according to an aspect of the present invention is formed by rotating an imaging element, a right parallax image, and a left parallax image to a first area of the imaging element and a second area different from the first area, respectively. A first imaging optical system to be read, an image signal reading means for reading a right parallax image signal from the first area of the imaging element and a left parallax image signal from the second area, and reading from the imaging element Image processing control means for rotating the output right parallax image signal and the left parallax image signal, and image recording for recording the right parallax image signal and the left parallax image signal rotated by the image processing control means on a recording medium Means.

  A stereoscopic imaging optical system as another aspect of the present invention is a stereoscopic imaging optical system that forms a right parallax image and a left parallax image in a first region and a second region different from the first region, respectively. , Having two sets of imaging light rotating means including at least three reflecting members inclined about different axes, and the two sets of imaging light rotating means include the right parallax image and the left parallax image. Rotate to form an image.

  According to another aspect of the present invention, there is provided a program for rotating a right parallax image and a left parallax image in a first area of an image sensor and a second area different from the first area to form a stereoscopic image. An imaging apparatus that can be mounted by exchanging the first imaging optical system for performing imaging and the second imaging optical system for performing two-dimensional imaging by forming one image on the third region of the imaging element A program to be executed, the step of identifying the stereoscopic imaging and the two-dimensional imaging, and the right parallax image signal and the left parallax image signal read from the imaging element when the stereoscopic imaging is identified And recording on the recording medium, and when the two-dimensional imaging is identified, the planar image signal read from the imaging element is recorded on the recording medium without being rotated. .

  Other objects and features of the present invention are illustrated in the following examples.

  According to the present invention, it is possible to provide an imaging device capable of recording a stereoscopic image with high image quality.

It is a schematic block diagram of the imaging device in a present Example. It is a control block diagram of the imaging device in a present Example. It is a top view of the imaging optical system (stereoscopic imaging optical system) in a present Example. It is a side view of the imaging optical system (stereoscopic imaging optical system) in a present Example. It is a perspective view of the folding mirror (imaging light rotation means) in a present Example. It is detail drawing of the folding mirror (imaging light rotation means) in a present Example. It is explanatory drawing of the to-be-photographed image obtained using the imaging optical system in a present Example. It is a top view of the imaging optical system (stereoscopic imaging optical system) which is another embodiment in a present Example. It is a side view of the imaging optical system (stereoscopic imaging optical system) which is another embodiment in a present Example. It is detail drawing of the folding mirror (imaging light rotation means) which is another embodiment in a present Example. It is a top view of the imaging optical system (stereoscopic imaging optical system) which is another embodiment in a present Example. It is a top view of the imaging optical system (stereoscopic imaging optical system) which is another embodiment in a present Example. 3 is a flowchart illustrating an image recording method of the imaging apparatus according to the first exemplary embodiment. FIG. 2 is a diagram illustrating an image sensor in Example 1. 6 is a flowchart illustrating an image recording method of the imaging apparatus according to the second embodiment. 10 is a flowchart illustrating an image recording method of the imaging apparatus according to Embodiment 3.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same members are denoted by the same reference numerals, and redundant description is omitted.

  First, an imaging device (stereoscopic imaging device) according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic configuration diagram of an imaging apparatus according to the present embodiment. In FIG. 1, reference numeral 1 denotes an imaging optical unit (stereoscopic imaging optical system) that captures a stereoscopic image. The imaging optical unit 1 is provided with an imaging optical system 101 for capturing a right parallax image and an imaging optical system 102 for capturing a left parallax image. Reference numeral 2 denotes an imaging device (imaging device main body). The imaging device 2 is provided with an imaging element 21, an image processing control unit 22, and an image recording unit 23.

  The imaging device 2 is configured to be replaceable with an imaging optical unit 1 (first imaging optical system) that performs stereoscopic imaging and a second imaging optical system (not shown) that performs two-dimensional imaging. As will be described later, the first imaging optical system including the imaging light rotating unit forms a right parallax image and a left parallax image formed by inverting the horizontal direction and the vertical direction in different regions on the imaging element. The image sensor 21 photoelectrically converts a right parallax image and a left parallax image formed in a second area different from the first area and the first area, respectively. In the case of performing two-dimensional imaging, an image obtained from the second imaging optical system is formed on a third region and subjected to photoelectric conversion.

  FIG. 2 is a control block diagram in the imaging apparatus 2. As shown in FIG. 2, the image processing control unit 22 controls the identification signal reading unit 24, the image signal reading unit 25, the stereoscopic image information adding unit 26, and the image recording unit 23. As will be described later, the image processing control unit 22 rotates the right parallax image signal and the left parallax image signal read out from the image sensor 21 so as to return to the vertical and horizontal relations of the original subject (for example, rotated by 90 degrees). ) The identification signal reading unit 24 reads the identification signal from the imaging optical unit 1 and outputs it to the image processing control unit 22. The image processing control unit 22 determines whether or not image rotation processing is necessary according to the identification signal. If the imaging optical unit 1 is the second imaging optical system that performs two-dimensional imaging, the above-described processing is performed. The image signal is not rotated. The image signal reading unit 25 reads an image signal from the image sensor 21 and outputs it to the image processing control unit 22. Specifically, the image signal reading unit 25 reads the right parallax image signal from the first area of the image sensor 21 and reads the left parallax image signal from the second area when performing stereoscopic imaging. When performing two-dimensional imaging, a planar image signal is read from the third area of the image sensor 21. The image recording unit 23 records the output image from the image processing control unit 22 on the recording medium 27. Specifically, the image recording unit 23 records the right parallax image signal and the left parallax image signal rotated by the image processing control unit 22 in the recording medium 27 when performing stereoscopic imaging. When performing two-dimensional imaging, a planar image signal is recorded on the recording medium 27.

  Next, the configuration of the imaging optical unit 1 in the present embodiment will be described with reference to FIGS. 3 to 7. FIG. 3 is a top view of the imaging optical unit 1 (stereoscopic imaging optical system). Reference numeral 610 denotes an imaging optical system that captures right parallax, and 620 denotes an imaging optical system that captures left parallax. The distance between the viewpoints, that is, the base line length is preferably about 65 mm, but can be changed according to the demand for stereoscopic effect when displaying a stereoscopic image. FIG. 4 is a side view of the imaging optical system 610 shown in FIG.

  3 or 4, reference numerals 611 and 621 denote imaging lenses that generate intermediate images Mr and Ml, respectively. Reference numerals 612 and 622 denote field lenses that guide light rays to relay lenses 614 and 624 for forming the intermediate images Mr and Ml on the image sensor 21, respectively. Reference numerals 613 and 623 denote folding mirrors that fold the optical path between the relay lenses 614 and 624 and the imaging element 21 inside the left and right imaging optical systems 610 and 620 and rotate the imaging light (image) by 90 degrees, respectively. Imaging light rotating means). In the present embodiment, the folding mirrors 613 and 623 as the two sets of imaging light rotating means are positions of the second pupil where the first pupils of the imaging optical systems 610 and 620 are imaged by the field lenses 612 and 622. It is arranged in the vicinity. With such an arrangement, it is possible to reduce the size of the folding mirrors 613 and 623 by rotating the imaging light at a relatively small portion of the light beam diameter.

  Next, the configuration of the folding mirror (imaging light rotating means) in this embodiment will be described. FIG. 5 is a perspective view of the folding mirror 613. As shown in FIG. 5, the optical axis O (light beam) is bent downward (Y direction described later) by a mirror 6131 and then bent horizontally (X direction) by a mirror 6132. Subsequently, the optical axis O is bent by a mirror 6133 in a direction parallel to the direction of incidence on the folding mirror and incident on the relay lens 614.

  6 is a detailed view of the folding mirror 613, FIG. 6 (a) is a top view of the folding mirror 613, FIG. 6 (b) is a front view, and FIG. 6 (c) is a side view. The coordinate axes shown in FIG. 6 are the Z axis in the optical axis direction of the imaging optical systems 610 and 620, the X axis in the direction in which the imaging optical systems 610 and 620 in FIG. The direction orthogonal to the (axis) is indicated as the Y axis. As shown in FIG. 6, the three mirrors 6131, 6132, 6133 constituting the folding mirror 613 are at an angle of 45 degrees around three axes orthogonal to each other (any one of the X, Y, and Z axes). It is arranged at an angle. In FIG. 6, the folding mirror 623 is not shown, but is arranged symmetrically with the folding mirror 613 with respect to the center line of the image sensor 21. Thus, the folding mirror 613 includes at least three reflecting members (mirrors) that are inclined with respect to different axes. The same applies to the folding mirror 623. The folding mirrors 613 and 623 have a function of rotating the right parallax image and the left parallax image on the image sensor 21.

  Next, another embodiment of the imaging optical unit 1 will be described with reference to FIGS. 8 to 10. FIG. 8 is a top view of an imaging optical unit 1 (stereoscopic imaging optical system) which is another embodiment. Reference numeral 710 denotes an imaging optical system that captures right parallax, and 720 denotes an imaging optical system that captures left parallax. FIG. 9 is a side view of the imaging optical system 710 shown in FIG.

  8 or 9, reference numerals 711 and 721 denote imaging lenses that generate intermediate images Mr and Ml, respectively. Reference numerals 712 and 722 denote relay lenses for forming the intermediate images Mr and Ml on the image sensor 21, respectively. Reference numerals 713 and 723 respectively denote folding mirrors that fold the optical path between the relay lenses 712 and 722 and the imaging element 21 inside the left and right imaging optical systems 710 and 720 and rotate the imaging light (image) by 90 degrees. Imaging light rotating means).

  FIG. 10 is a detailed view of the folding mirror 713, FIG. 10 (a) is a top view of the folding mirror 713, FIG. 10 (b) is a front view, and FIG. 10 (c) is a side view. In the coordinate axes shown in FIG. 10, the optical axis direction of the imaging optical systems 710 and 720 is the Z axis, and the direction in which the imaging optical systems 710 and 720 of FIG. 8 are arranged is the X axis and the two axes (X axis, Z The direction orthogonal to the (axis) is indicated as the Y axis. The optical axis O (light beam) is bent in the horizontal direction by the mirror 7131 and then bent downward by the mirror 7132. Subsequently, the optical axis O is bent by a mirror 7133 in a direction parallel to the direction of incidence on the folding mirror and is incident on the image sensor 21.

  As shown in FIG. 10, the three mirrors 7131, 7132, and 7133 that constitute the folding mirror 713 are arranged with inclinations about different axes (any one of the X, Y, and Z axes). ing. Further, although the folding mirror 723 is not shown in FIG. 10, it is arranged in plane symmetry with respect to the center line of the image sensor 21. As described above, by arranging at least three mirrors tilted about different axes as described above, an image obtained by inverting the horizontal direction and the vertical direction of the image can be formed on the image sensor 21. .

  Next, still another embodiment of the imaging optical unit 1 will be described with reference to FIG. FIG. 11 is a top view of an imaging optical system which is still another embodiment. Reference numeral 801 denotes an imaging lens that generates an intermediate image M. Reference numeral 802 denotes a pupil imaging lens that is disposed in the vicinity of the intermediate imaging M and generates an image of the aperture of the imaging lens 801. Reference numerals 803 and 804 are provided in the vicinity of the image of the stop S imaged by the pupil imaging lens 802, a part of the light beam passing through the image of the stop S is sent to the first optical path 811 and another part of the light beam is the first. This is a splitting mirror that splits into two optical paths 821. Reference numerals 812 and 822 denote relay optical systems provided in the first optical path 811 and the second optical path 821, respectively, and images the light beams divided by the split mirrors 803 and 804 on the image sensor 21. Reference numerals 813 and 823 denote folding mirrors that fold the optical path between the relay optical systems 812 and 822 and the imaging element 21 inside the left and right imaging optical systems and rotate the image by 90 degrees. Reference numerals 814 and 824 denote mirrors that bend the respective optical paths.

  Next, still another embodiment of the imaging optical unit 1 will be described with reference to FIG. FIG. 12 is a top view of an imaging optical system which is still another embodiment. Reference numeral 901 denotes an objective lens that converts light from an object into parallel light. Reference numerals 902 and 903 are provided in the vicinity of a stop (not shown) of the optical system, and divide a part of the light beam passing through the stop into the first optical path 911 and another part of the light beam into the second optical path 921. It is a split mirror. Reference numerals 912 and 922 denote imaging optical systems provided in the first optical path 911 and the second optical path 921, respectively, and images the light beams divided by the dividing mirrors 902 and 903 on the image sensor 21. Reference numerals 913 and 923 denote folding mirrors that fold the optical path between the imaging optical systems 912 and 922 and the image sensor 21 inside the left and right optical systems and rotate the image by 90 degrees.

  Next, the effect of the mirror arrangement as described above will be briefly described. FIG. 7 is an explanatory diagram of a right parallax image Ir and a left parallax image Il obtained by forming an image of the subject Obj on the image sensor 21 using the imaging optical systems 610 and 620. By disposing three mirrors tilted about different axes as described above, two images (right parallax) in which the horizontal direction and the vertical direction are reversed with respect to the image of the subject Obj (FIG. 7A). The image Ir and the left parallax image Il) can be imaged on the image sensor 21 (FIG. 7B). In this embodiment, at least three mirrors may be provided, and more mirrors may be provided.

  According to the imaging device of each of the embodiments described above, it is possible to form an image on one imaging element in a state where the left and right parallax images are rotated 90 degrees as shown in FIG. For this reason, it is possible to acquire a high-quality left and right parallax image with one image sensor without compressing the horizontal direction of a horizontally long image like the aspect ratio of a conventional moving image. Further, since the horizontally long image is rotated 90 degrees and formed on the image sensor, the diagonal length of the image sensor can be made relatively small, and the entire image pickup optical system can be downsized. Furthermore, since the left and right parallax images can be acquired simultaneously, the photographing conditions such as the shutter speed cannot be increased are not limited. Furthermore, since the moving object position does not differ between the left and right parallax images even during moving object shooting, it is possible to realize a natural image as a stereoscopic image.

  Next, with reference to FIGS. 13 and 14, an image recording method executed by the imaging apparatus according to the first embodiment of the present invention will be described. FIG. 13 is a flowchart illustrating an image recording method in the imaging apparatus according to the present exemplary embodiment. The image recording method according to the present embodiment is a program executed by an imaging apparatus (control unit) that can be mounted by exchanging an imaging optical system that performs stereoscopic imaging and an imaging optical system that performs two-dimensional imaging. Stored in storage means.

  First, in step S1, the user switches on photographing. Subsequently, in step S <b> 2, the identification signal reading unit 24 reads the identification signals of the imaging optical systems 101 and 102 from the imaging optical unit 1. In step S3, the image processing control unit 22 determines whether the identification signal read by the identification signal reading unit 24 is a signal indicating a stereoscopic image (three-dimensional image) or a two-dimensional image. If it is determined in step S3 that the identification signal is a signal indicating a stereoscopic image, the process proceeds to step S4. On the other hand, when it is determined in step S3 that the identification signal is a signal indicating a two-dimensional image, the process proceeds to step S11.

  In step S <b> 4, the image reading unit 25 reads the right parallax image signal (right parallax image) from the first region of the image sensor 21 and outputs the right parallax image signal to the image processing control unit 22. Subsequently, in step S5, the image processing control unit 22 rotates the right parallax image signal by 90 degrees (returns the original rotation amount by the imaging light rotation unit). In step S6, the stereoscopic image information adding unit 26 adds information indicating that the image signal is a right parallax image (stereoscopic image information) to the right parallax image signal (image information) input to the image processing control unit 22. ) Is added.

  In step S <b> 7, the image reading unit 25 reads the left parallax image signal (left parallax image) from the second region of the image sensor 21 and outputs the left parallax image signal to the image processing control unit 22. Subsequently, in step S8, the image processing control unit 22 rotates the left parallax image signal by 90 degrees (returns the original rotation amount by the imaging light rotation unit). In step S9, the stereoscopic image information adding unit 26 adds, to the left parallax image signal (image information) input to the image processing control unit 22, information indicating that this image signal is a left parallax image (stereoscopic image information). ) Is added. Subsequently, in step S <b> 10, the image recording unit 23 continuously records two images of the right parallax image signal and the left parallax image signal on the recording medium 27.

  On the other hand, when the identification signal is a signal indicating a two-dimensional image, in step S <b> 11, the image reading unit 25 reads a two-dimensional image signal (two-dimensional image) from the third region of the image sensor 21. Is output to the image processing control means 22. The image processing control means 22 outputs the two-dimensional image signal to the image recording means 23 without rotating it. In step S <b> 10, the image recording unit 23 records one image composed of a two-dimensional image signal on the recording medium 27. After the image recording in step S10 or step S12 is completed, the process proceeds to step S13 to enter a standby state for the next shooting.

  FIG. 14 is a diagram illustrating the image sensor 21 in the present embodiment. In FIG. 14, a region 211 surrounded by a solid line is a first region, a region 212 surrounded by a dotted line is a second region, and a region 213 surrounded by a two-dot broken line is a third region. These three areas 211, 212, and 213 are different areas. In this embodiment, the areas 211 and 212 do not have a shared area with each other. On the other hand, a part of the areas 211 and 212 is shared with the area 213 (the area 213 has a shared area with the areas 211 and 212).

  As described above, in this embodiment, the imaging region of the image sensor 21 when performing stereoscopic imaging is set as shown in FIG. That is, when performing stereoscopic imaging, the right parallax image and the left parallax image are rotated by 90 degrees and formed on the image sensor 21. Then, the right parallax image signal and the left parallax image signal obtained by the photoelectric conversion are processed so as to be reversely rotated (returned to the original direction). For this reason, when performing stereoscopic imaging, a right parallax image and a left parallax image having the same resolution as an image obtained by two-dimensional imaging are simultaneously formed on the imaging element 21.

  The imaging optical unit 1 of the present embodiment is configured to be replaceable by a connection unit 4 shown in FIG. When the imaging optical unit 1 includes an imaging optical system that captures a two-dimensional image, the imaging optical unit 1 does not have a stereoscopic image identification signal.

  In the present embodiment, the image recording method for determining whether the image processing control means 22 is a stereoscopic image or a two-dimensional image and recording the image is described. However, the present invention is not limited to this. . For example, after image information is read from the image sensor 21, various image processes may be performed before the image information is recorded on the recording medium 27.

  Next, an image recording method executed by the imaging apparatus according to the second embodiment of the present invention will be described with reference to FIG. FIG. 15 is a flowchart illustrating an image recording method in the imaging apparatus according to the present exemplary embodiment.

  First, in step S <b> 21, when the power is turned on, the identification signal reading unit 24 reads the identification signals of the imaging optical systems 101 and 102 from the imaging optical unit 1. In step S22, the user switches on shooting. The present embodiment is different from the first embodiment in which the order is reversed after the identification signal is read and the photographing switch is turned on. Subsequent steps S3 to S13 are the same as those in the first embodiment, and a description thereof will be omitted.

  Next, with reference to FIG. 16, an image recording method executed by the imaging apparatus according to the third embodiment of the present invention will be described. FIG. 16 is a flowchart illustrating an image recording method in the imaging apparatus according to the present exemplary embodiment.

  First, in step S1, the user switches on photographing. Subsequently, in step S <b> 2, the identification signal reading unit 24 reads the identification signals of the imaging optical systems 101 and 102 from the imaging optical unit 1. The process up to this point is the same as in the first embodiment. Subsequently, in step S <b> 25, the image reading unit 25 reads an image signal from the image sensor 21. In step S3, the image processing control unit 22 determines whether the identification signal read by the identification signal reading unit 24 is a signal indicating a stereoscopic image (three-dimensional image) or a two-dimensional image. If it is determined in step S3 that the identification signal is a signal indicating a stereoscopic image, the process proceeds to step S40. On the other hand, when it is determined in step S3 that the identification signal is a signal indicating a two-dimensional image, the process proceeds to step S11.

  In step S <b> 40, the image processing control unit 22 cuts out image information in a range corresponding to the first region of the image sensor 21 as right parallax image information (right parallax image signal). Subsequently, in step S5, the image processing control means 22 rotates the right parallax image signal by 90 degrees. In step S6, the stereoscopic image information adding unit 26 adds information (stereoscopic image information) indicating that the image signal is a right parallax image to the right parallax image signal input to the image processing control unit 22. .

  In step S70, the image processing control unit 22 cuts out image information in a range corresponding to the second region of the image sensor 21 as left parallax image information (left parallax image signal). Subsequently, in step S8, the image processing control means 22 rotates the left parallax image signal by 90 degrees. In step S9, the stereoscopic image information adding unit 26 adds, to the left parallax image signal (image information) input to the image processing control unit 22, information indicating that this image signal is a left parallax image (stereoscopic image information). ) Is added. Subsequently, in step S <b> 10, the image recording unit 23 continuously records two images of the right parallax image signal and the left parallax image signal on the recording medium 27.

  On the other hand, when the identification signal is a signal indicating a two-dimensional image, the process goes through steps S11 and S12 as in the first embodiment. After the image recording in step S10 or step S12 is completed, the process proceeds to step S13 to enter a standby state for the next shooting.

  According to each of the above embodiments, it is possible to provide an imaging device capable of recording a stereoscopic image with high image quality.

  Furthermore, according to the imaging apparatus of each embodiment, when a stereoscopic image is captured with respect to the imaging element, left and right parallax images are captured in two areas of the imaging element, and when a two-dimensional image is captured, an image is captured in one area. Can be imaged. Therefore, according to each of the above embodiments, a stereoscopic image and a two-dimensional image are distinguished and recorded with high image quality in an imaging device that can be mounted by replacing the optical system for stereoscopic imaging and the optical system for two-dimensional imaging. A possible imaging device can be provided.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

DESCRIPTION OF SYMBOLS 1 Imaging optical part 101,102 Imaging optical system

Claims (10)

An image sensor;
A first imaging optical system that rotates and forms a right parallax image and a left parallax image in a first region of the image sensor and a second region different from the first region, respectively;
Image signal reading means for reading a right parallax image signal from the first region of the image sensor and reading a left parallax image signal from the second region;
Image processing control means for rotating the right parallax image signal and the left parallax image signal read from the image sensor;
An image recording apparatus comprising: an image recording unit configured to record the right parallax image signal and the left parallax image signal rotated by the image processing control unit on a recording medium.   The imaging apparatus according to claim 1, wherein the image processing control unit rotates the right parallax image signal and the left parallax image signal by 90 degrees.   3. The imaging apparatus according to claim 1, wherein the first imaging optical system includes two sets of imaging light rotating means including at least three reflecting members inclined with respect to different axes. .   The first imaging optical system can be replaced with a second imaging optical system that performs two-dimensional imaging, and an image formed by the second imaging optical system is formed in a third region of the imaging element. The imaging apparatus according to any one of claims 1 to 3, wherein   The right parallax image and the left parallax image having the same resolution as an image obtained by the two-dimensional imaging are simultaneously formed on the imaging element when the imaging device performs stereoscopic imaging. 5. The imaging device according to 4. The first area and the second area on the image sensor do not have a shared area with each other,
The imaging apparatus according to claim 4, wherein the third area on the imaging element has a shared area with the first area or the second area. A stereoscopic imaging optical system that forms a right parallax image and a left parallax image in a first region and a second region different from the first region, respectively,
Two sets of imaging light rotation means having at least three reflecting members inclined about different axes from each other;
The stereoscopic imaging optical system characterized in that the two sets of imaging light rotating means rotate the right parallax image and the left parallax image to form an image.   The imaging light rotating means is a folding mirror including three mirrors arranged at an angle of 45 degrees around three axes orthogonal to each other, and constitutes the two sets of imaging light rotating means. The stereoscopic imaging optical system according to claim 7, wherein each set of three mirrors is disposed in plane symmetry with each other.   The stereoscopic imaging optical system according to claim 7 or 8, wherein the two sets of imaging light rotating means rotate the right parallax image and the left parallax image by 90 degrees. A first imaging optical system that performs stereoscopic imaging by rotating and imaging a right parallax image and a left parallax image in a first area of the image sensor and a second area different from the first area, and 1 A program executed by an imaging device that can be mounted by exchanging a second imaging optical system that performs two-dimensional imaging by forming two images on the third region of the imaging element,
Identifying the stereoscopic imaging and the two-dimensional imaging;
A step of rotating the right parallax image signal and the left parallax image signal read from the image sensor and recording them on a recording medium when the stereoscopic imaging is identified;
And a step of recording the planar image signal read from the image sensor on the recording medium without rotating when the two-dimensional imaging is identified.