JP2016142947A - Compound-eye imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain thinness of a compound-eye imaging device and miniaturization thereof in a front view.SOLUTION: A compound-eye imaging device 1 includes: a plurality of image formation optical systems mutually different in a focal length; and imaging means 10 that includes a plurality of shot areas shooting a plurality of object images formed by the plurality of image formation optical systems, respectively. The plurality of image formation optical systems includes: a plurality of first image formation optical systems 110a to 110d having an optical path bended by reflection; and a plurality of second image formation optical systems 120a to 120d having the optical path non-bended. Let an entire length of an optical system of the second image formation optical system with a longest entire length of the optical system among the plurality of second image formation optical systems be L, and respective focal lengths of the plurality of first image formation optical systems be fi, the plurality of first image formation optical systems satisfies a condition of 1.4≥L/fi.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a compound eye imaging apparatus having a plurality of imaging optical systems having different focal lengths (view angles).

  As a compound eye imaging apparatus as described above, Patent Document 1 includes an imaging optical system (short focal lens) having a short focal length and an imaging optical system (long focal lens) having a long focal length. A compound eye imaging device that captures an image so as to include the same part of a subject is disclosed. In this compound-eye imaging device, a zoom-up image obtained by imaging a subject image formed by a long focus lens is fitted to a part of a wide image obtained by imaging a subject image formed by a short focus lens. Include. Thereby, it is possible to obtain a composite image in which the zoomed-up image portion has a high resolution while having a wide angle of view.

  Further, in such a compound eye imaging apparatus, an image corresponding to an angle of view between the angles of view optically obtained by a plurality of imaging optical systems is generated by an image processing technique such as digital zoom, thereby enabling pseudo continuous zoom. There are known ways of obtaining functionality. However, the long focus lens used in the compound-eye imaging device disclosed in Patent Document 1 is a straight optical system in which the optical path extends linearly. For this reason, the thickness of the imaging device increases as the focal length of the long focal length lens is increased in order to increase the imaging magnification.

  In order to solve such a problem, an imaging apparatus using a bending optical system that bends an optical axis of an imaging optical system using a reflecting member is known. Patent Document 2 discloses a long focal length imaging optical system in order to reduce the thickness of a compound eye imaging device having a long focal length imaging optical system and a short focal length imaging optical system. A configuration as a bending optical system is disclosed. Patent Document 3 discloses a compound eye imaging device in which all of a plurality (2 to 4) of imaging optical systems are bent optical systems.

JP 2005-303694 A JP 2011-55246 A JP 2011-257770 A

  However, in order to generate images with various angles of view as the above-described composite image, or to change the imaging magnification by the pseudo continuous zoom function in a wide range, the compound eye imaging device is disclosed in Patent Documents 2 and 3. There may be a case where a larger number (for example, 8 or 16) of imaging optical systems than the apparatus is provided. In such a compound eye imaging apparatus, if all the imaging optical systems or imaging optical systems other than the short focal length are bent optical systems, these imaging systems are used in order to avoid interference between adjacent imaging optical systems. It becomes necessary to widen the distance between the incident surfaces of the optical system. As a result, the size of the compound eye imaging device when viewed from the front (viewed in the optical axis direction from the object side of the imaging optical system) increases, or the parallax between the imaging optical systems becomes too large, so that imaging is used for imaging. The position of the subject in the image is greatly shifted due to the change of the optical system.

  The present invention has a large number of image forming optical systems including a plurality of image forming optical systems having different focal lengths, and can be reduced not only in thickness but also in a front view, and further between image forming optical systems. Provided is a compound eye imaging device which allows parallax to be within an appropriate range.

  A compound eye imaging device according to an aspect of the present invention includes a plurality of imaging optical systems having different focal lengths and a plurality of imaging regions that respectively capture a plurality of object images formed by the plurality of imaging optical systems. And imaging means. The plurality of imaging optical systems includes a plurality of first imaging optical systems whose optical paths are bent by reflection, and a plurality of second imaging optical systems whose optical paths are not bent. When viewed from the object side of the plurality of imaging optical systems, the optical axis of at least one second imaging optical system among the plurality of second imaging optical systems is the plurality of first imaging. The optical path is arranged in a first region surrounded by a line connecting the optical axis positions of the optical system, and the bending direction of the optical path in each first imaging optical system is a direction toward the outside of the first region. And in the same direction or in opposite directions.

A compound eye imaging device according to another aspect of the present invention includes a plurality of imaging optical systems having different focal lengths and a plurality of object images formed by the plurality of imaging optical systems, respectively. Imaging means including an imaging region. The plurality of imaging optical systems includes a plurality of first imaging optical systems whose optical paths are bent by reflection, and a plurality of second imaging optical systems whose optical paths are not bent. The total length of the second imaging optical system having the longest optical system length among the plurality of second imaging optical systems is L, and the focal length of each of the plurality of first imaging optical systems is fi. When the plurality of first imaging optical systems is
1.4 ≧ L / fi
It satisfies the following condition.

  According to the present invention, in a compound eye imaging device having a large number of imaging optical systems including a plurality of imaging optical systems having different focal lengths, it is possible to reduce the thickness and size of the optical axis direction view (front view). The parallax between the imaging optical systems can be within an appropriate range.

1 is a block diagram showing a configuration of a compound eye camera that is Embodiment 1 of the present invention. FIG. The figure which looked at the compound eye camera of Example 1 from the optical axis direction. FIG. 3 is a diagram illustrating an image obtained by imaging with the compound eye camera according to the first embodiment. 2 is a cross-sectional view of a wide optical system and a tele optical system of the compound eye camera of Embodiment 1. FIG. FIG. 5 is an aberration diagram of the wide optical system and the tele optical system illustrated in FIG. 4. 3 is a flowchart illustrating image composition processing performed by the compound eye camera according to the first exemplary embodiment. FIG. 5 is a diagram illustrating an image used for wide-angle image synthesis with the compound-eye camera according to the first embodiment. FIG. 3 is a diagram for explaining a corresponding region extraction method used in the compound eye camera according to the first embodiment. FIG. 3 is a diagram illustrating an image used for telephoto side image synthesis with the compound-eye camera according to the first embodiment. 3 is a flowchart illustrating intermediate angle-of-view image generation processing performed by the compound eye camera according to the first exemplary embodiment. 5 is a flowchart illustrating distance information calculation processing in the compound eye camera according to the first exemplary embodiment. The figure which looked at the compound eye camera which is Example 2 of the present invention from the optical axis direction. Sectional drawing of the wide optical system of the compound eye camera of Example 2, a wide middle optical system, a tele middle optical system, and a tele optical system. FIG. 14 is an aberration diagram of the wide optical system, the wide middle optical system, the tele middle optical system, and the tele optical system illustrated in FIG. 13. Sectional drawing of the wide optical system of the compound eye camera of Example 3 of this invention, a wide middle optical system, a tele middle optical system, and a tele optical system. FIG. 16 is an aberration diagram of the wide optical system, wide middle optical system, telemiddle optical system, and tele optical system of the compound-eye camera illustrated in FIG. 15. Sectional drawing of the wide optical system and tele optical system of a compound eye camera which is Example 4 of this invention. FIG. 18 is an aberration diagram of the wide optical system and the tele optical system illustrated in FIG. 17. The figure explaining the imaging from a different viewpoint. The figure explaining the subject position shift in an image.

  Embodiments of the present invention will be described below with reference to the drawings.

  Prior to the description of the specific embodiments, common items in the embodiments of the present invention will be described. The compound-eye imaging apparatus (hereinafter referred to as a compound-eye camera) according to the embodiment realizes a continuous zoom effect using a plurality of single-focus imaging optical systems having discretely different focal lengths (field angles). Specifically, an image with an intermediate angle of view between a plurality of captured images obtained by imaging through each of a plurality of imaging optical systems is trimmed from a part of the captured image with an angle of view close to the intermediate angle of view. A pseudo continuous zoom effect is obtained by interpolating with a digital zoom process that expands. Since a continuous zoom effect can be obtained using only a single focus imaging optical system, a thin compound eye camera can be configured without requiring a zoom drive mechanism. In the embodiment, this digital zoom processing is also referred to as intermediate angle of view image generation processing.

  In the compound eye camera of the embodiment, a captured image obtained through an imaging optical system having an angle of view (long focal length) narrower than the intermediate angle of view on a part of the image of the intermediate angle of view obtained by the digital zoom process. A different angle-of-view image combining process is also performed. As a result, an intermediate angle of view image having a wide angle of view can be obtained although the resolution of the inserted image portion is high and the resolution of the other image portions is low.

  In these intermediate angle-of-view image generation processing and different angle-of-view angle image synthesis processing, an image used to synthesize an image with the desired angle of view is acquired through an imaging optical system having an angle of view close to that angle of view. For this reason, it is possible to generate a high-quality image while obtaining a high zoom ratio as compared with a case where the angle of view is simply changed only by digital zoom from an image obtained through the imaging optical system of one angle of view.

  Further, in the compound eye camera of the embodiment, the tele optical system is a bending optical system by disposing a reflecting member for bending the optical path in an imaging optical system (hereinafter also referred to as a tele optical system) having a long focal length. . Thereby, the thickness of the compound eye camera is reduced, that is, the thickness is reduced.

  However, the compound-eye camera of the embodiment has a plurality of imaging optical systems (8 in the first embodiment and 16 in the second embodiment) that are more than four. In this case, if all the imaging optical systems are simply bent optical systems, it is necessary to widen the interval between the entrance surfaces of these imaging optical systems in order to avoid interference between adjacent imaging optical systems. Further, in the embodiment, there may be many imaging optical systems having three or more types of focal lengths (in the second embodiment, 16 imaging optical systems having four types of focal lengths are provided). In this case, even if all the imaging optical systems other than the imaging optical system having the shortest focal length are simply bent optical systems, there is a high possibility that it is necessary to increase the interval between the entrance surfaces of the imaging optical system. As a result, the size of the compound eye camera viewed from the front (viewed in the optical axis direction from the object side of the imaging optical system) increases.

  Furthermore, if the distance between the entrance surfaces of the imaging optical system is widened, the parallax between the imaging optical systems becomes too large, and the position of the subject in the image increases due to the change of the imaging optical system used for imaging. Misalignment, intermediate view angle image generation processing and different view angle image composition processing cannot be performed satisfactorily. This will be described with reference to FIGS. 19 and 20.

  FIG. 19 shows a subject A, a subject B, and imaging units C1, C2, and C3 that capture the subjects A and B. Each imaging unit includes an imaging optical system and an imaging element that captures a subject image formed by the imaging optical system. Subject A is separated from each imaging unit by subject distance La, and subject B is separated from each imaging unit by subject distance Lb (> La). The imaging units C1, C2, and C3 are arranged apart from each other by a certain distance (base line length) in a direction orthogonal to the optical axis of the imaging optical system. For this reason, there is a parallax between images obtained by these imaging units C1, C2, and C3.

  20A, 20B, and 20C show images obtained by imaging by the imaging units C1, C2, and C3, respectively. As can be seen from these figures, the positions of the subjects A and B in the image are shifted by different amounts due to the geometric relationship according to the base line length and the subject distance. That is, the position of the subject on the image moves according to the viewpoint.

  For this reason, the compound-eye camera of the embodiment has the following configuration so that the angle of view can be changed while reducing the displacement of the subject position in the image using an imaging optical system having a different angle of view and viewpoint.

  The compound-eye camera of the embodiment includes a plurality of first imaging optical systems having a first angle of view and a second wider than the first angle of view as a plurality of imaging optical systems having different angles of view. A plurality of second imaging optical systems having an angle of view. In other words, the plurality of first imaging optical systems have a first focal length, and the plurality of second imaging optical systems have a second focal length shorter than the first focal length. Then, when viewed from the object side in the direction of the optical axis (hereinafter also referred to as front view), a plurality of elements are included in a first region surrounded by a line connecting the positions of the optical axes of the plurality of first imaging optical systems. The optical axis of at least one second imaging optical system is arranged in the second imaging optical system. According to this configuration, each of the images obtained through the plurality of first imaging optical systems is based on the image obtained through the second imaging optical system in which the optical axis is disposed in the first region. Can be changed with high accuracy. For this reason, it is possible to easily reduce the subject position shift (subject position shift) on the image due to the change in the angle of view.

  In the embodiment, the plurality of first imaging optical systems are bent optical systems in which the optical path is bent by reflection by a reflecting member. On the other hand, the plurality of second imaging optical systems are straight optical systems that extend linearly without bending the optical path. The bending direction of the optical path in each first imaging optical system (bending optical system) is a direction toward the outside of the first region, and is the same direction or opposite direction. Furthermore, the direction of bending of the optical path in each first imaging optical system is different from the side of the second imaging optical system adjacent to the first imaging optical system. As a result, while having a large number (for example, more than 4) of imaging optical systems, it is possible not only to reduce the thickness but also to reduce the size of the front view, and to set the parallax between the imaging optical systems within an appropriate range. Can fit.

In order to obtain this effect more reliably, in the embodiment, the plurality of first imaging optical systems are optical systems that satisfy the following conditions. That is, the total length of the second imaging optical system having the longest optical system length among the plurality of second imaging optical systems (straight optical systems) is L, and the plurality of first imaging optical systems (refractions). Let each focal length of the optical system) be fi. At this time, the plurality of first imaging optical systems are
1.4 ≧ L / fi (1)
Satisfy the following conditions.

  The condition of the expression (1) is that an imaging optical system effective for achieving both imaging performance and thinning of the camera by using a bending optical system when realizing a high magnification as a whole camera. This is a condition for selection. When the imaging optical system that satisfies the condition of formula (1) is configured as a straight optical system, the total length of the imaging optical system (lens total length) having a long focal length becomes long. Increase. Here, the total length of the optical system is defined as a value obtained by adding a value (back focus) in which the distance from the final lens surface to the paraxial image surface is converted into air, to the distance from the lens surface closest to the object side to the final lens surface. .

  If the refractive power of the lens constituting the imaging optical system having a long focal length is increased, the total length of the optical system can be shortened, but it is difficult to correct various aberrations such as chromatic aberration, coma aberration, and field curvature. As a result, the imaging performance deteriorates. Further, if the imaging optical system that does not satisfy the condition of the expression (1) is a bending optical system including a reflecting member, the imaging optical system itself becomes large and it is difficult to obtain the effect of reducing the thickness of the compound eye camera. Especially in an imaging optical system with a short focal length, the diameter of the lens closest to the object side and the diameter of the lens arranged in the vicinity of the reflecting member increase, so the thickness of the compound eye camera increases when configured as a bending optical system. Let

Note that it is better to set the numerical range of the expression (1) as follows.
1.2 ≧ L / fi (1a)
1.0 ≧ L / fi (1b)
0.8 ≧ L / fi (1c)
The compound-eye camera of the embodiment having the above-described configuration has a large number of imaging optical systems including a plurality of imaging optical systems having different focal lengths, and increases the magnification of the entire camera, and each imaging optical system. It is possible to achieve good imaging performance and a thinner camera.

  Hereinafter, specific examples 1 to 4 will be described.

  FIG. 1 shows an overall configuration of a compound eye camera 1 of the present embodiment. The compound eye camera 1 includes an imaging optical unit 100, an imaging unit (imaging means) 10, an A / D converter 11, an image processing unit 12, an information input unit 16, an imaging control unit 17, and an image recording medium. 18, a system controller 19, and a display unit (display means) 20. Furthermore, the compound eye camera 1 also has a distance information calculation unit (distance calculation means) 21.

  The compound eye camera 1 may be an imaging optical system-integrated camera in which the imaging optical unit 100 is integrally provided, or the imaging optical unit 100 is detachable (replaceable) from the camera body. An image optical system exchange type camera may be used. The compound eye camera 1 of the present embodiment is an imaging optical system integrated camera. Further, the imaging optical unit 100 of FIG. 1 shows a simplified configuration of an imaging optical system, which will be described later, as viewed from a direction orthogonal to the optical axis.

  FIG. 2 shows the imaging optical unit 100 according to the present embodiment in front view (viewed in the optical axis direction from the object side). The imaging optical unit 100 includes a plurality (eight in this embodiment) of imaging optical systems 110a, 110b, 110c, 110d, 120a, 120b, 120c, and 120d. The plurality of image forming optical systems 110a to 110d and 120a to 120d are arranged apart from each other in a two-dimensional direction orthogonal to the respective optical axes. The optical axes of the imaging optical systems 110a to 110d and 120a to 120d extend parallel to each other on the object side.

The first imaging optical system 110a~110d includes a first field angle theta ₁ corresponding to the first focal length. In the following description, the first imaging optical systems 110a to 110d are collectively referred to as a first imaging optical system group. The first field angle θ ₁ corresponds to the telephoto end field angle that is the narrowest field angle in the compound-eye camera of the present embodiment. The second imaging optical system 120a~120d has corresponding short second focal length than the first focal length, a second field angle theta ₂ wider than the first field angle theta. In the following description, the second imaging optical systems 120a to 120d are collectively referred to as a second imaging optical system group. The second field angle θ ₂ corresponds to the wide-angle end field angle that is the widest field angle in the compound-eye camera of the present embodiment.

  In the present embodiment, two first imaging optical systems 110a to 110d arranged in the vertical direction and two second imaging optical systems 120a to 120d arranged in the vertical direction are arranged in the horizontal direction (in FIG. 2). Alternating from left to right. Thus, a compound eye is configured in which the imaging optical system group is arranged in a matrix of horizontal 4 eyes × vertical 2 eyes.

  Further, each of the first imaging optical systems 110a to 110d is configured as a bending optical system in which an optical path is bent in a direction indicated by a dotted line in FIG. Thus, the thickness of the compound eye camera 1 can be reduced by using the first imaging optical systems 110a to 110d having the telephoto end angle of view as bending optical systems.

  In addition, the first imaging optical systems 110a to 110d are arranged on the outer peripheral portion of the horizontal four eyes × vertical two eyes imaging optical system group, and the second imaging optics adjacent to these optical paths in the bending direction. The direction is different from the side of the systems 120a to 120d. Accordingly, it is possible to arrange all the imaging optical systems 110a to 110d and 120a to 120d with high density while securing a space for bending the optical paths of the first imaging optical systems 110a to 110d. As a result, not only can the horizontal size (horizontal width) of the compound eye camera 1 be reduced, but also object position shift and object deformation during imaging at different angles of view can be reduced. By reducing the subject position shift and the subject deformation, it is possible to easily perform an image composition process to be described later.

  The imaging unit 10 includes eight imaging elements 10a to 10h constituting imaging regions corresponding to the eight imaging optical systems 110a to 110d and 120a to 120d (that is, provided for each imaging optical system). . Each imaging device photoelectrically converts a subject image (object image) as an optical image formed by a corresponding imaging optical system and outputs an analog imaging signal. The analog imaging signal is converted into a digital imaging signal by the A / D converter 11, and the digital imaging signal is input to the image processing unit 12.

  The image processing unit 12 performs various image processing such as pixel interpolation processing and color conversion processing on the digital imaging signal to generate an image. Thereby, eight images can be generated by imaging through each of the eight imaging optical systems 110a to 110d and 120a to 120d. The image processing unit 12 also performs digital zoom processing and the like on the generated image. The image processed by the image processing unit 12 is sent to the system controller 19.

  The image processing unit 12 includes an image composition unit (image composition unit) 13, an intermediate angle of view image generation unit (image generation unit) 14, and a preview image generation unit 15.

  The image synthesizing unit 13 synthesizes four images obtained by imaging through each of the first imaging optical systems 110a to 110d by shifting the pixels from each other, and the first synthesized image (pixels) shown in FIG. A shifted composite image) 110 is generated. Further, the image composition unit 13 composes the four images obtained by imaging through the second imaging optical systems 120a to 120d by shifting the pixels from each other, and the first composite image shown in FIG. A second composite image (pixel-shifted composite image) 120 having an imaging angle of view wider than 110 is generated. In the following description, “obtained by imaging through the imaging optical system” is simply referred to as “obtained through the imaging optical system”.

  Here, in FIG. 2, the positions of the optical axes of the first imaging optical systems 110 a to 110 d are connected by a solid line (straight line) extending in the vertical direction and the horizontal direction, and a region surrounded by the solid line is a first line. The area is Further, the positions of the optical axes of the second imaging optical systems 120a to 120d are connected by a broken line (straight line) extending in the vertical direction and the horizontal direction, and a region surrounded by the broken line is defined as a second region. In FIG. 2, the broken lines are slightly shifted from the positions of the optical axes of the second imaging optical systems 120 a to 120 d so that the solid lines and the broken lines are easy to see.

  As can be seen from this figure, in the present embodiment, one second imaging optical system (specific second imaging optics) among the plurality of second imaging optical systems 120a to 120d in the first region. System) 120c optical axis is arranged. Hereinafter, the viewpoint from the second imaging optical system 120c is referred to as a reference viewpoint RP, and the second imaging optical system 120c is also referred to as a reference optical system. With this arrangement relationship, the reference optical system that becomes the reference viewpoint RP when the four images obtained through the first imaging optical systems 110a to 110d are combined to generate the first combined image. The image obtained through 120c can be used as a composite reference (reference image).

  The image synthesizing unit 13 uses corresponding point search methods such as a block matching method, which will be described later, using this reference image, and images obtained through an imaging optical system having the same angle of view or images having different angles of view. The images obtained through the image optical system are synthesized. As a result, a composite image corresponding to all the imaging angles of view can be virtually generated as an image obtained by imaging from the reference viewpoint RP. As a result, the imaging angle of view from the imaging state of the second composite image 120 through the second imaging optical system group to the imaging state of the first composite image 110 through the first imaging optical system group. The object position shift between the composite images 110 and 120 when the change (zooming) is performed can be reduced.

  The intermediate angle-of-view image generation unit 14 generates an intermediate angle-of-view image for interpolating the angle of view (intermediate angle of view) between different angles of view that the first and second imaging optical system groups have discretely. . As a method for generating an intermediate angle-of-view image, a super-resolution process that performs a resolution enhancement process using a plurality of images can be used. For super-resolution processing, ML (Maximum-Likelihood) method, MAP (Maximum A Posterior) method, POCS (Projection Onto Convex Set) method, IBP (Iterative Back Projection) method, LR (Lucy-Richardson) method, etc. are used. be able to. Further, in this embodiment, the telephoto image obtained through the first imaging optical system group corresponding to the telephoto lens is synthesized (inserted) into a partial region of the image obtained by the digital zoom. As a result, a different angle-of-view image synthesis process is performed in which an image with an intermediate angle of view can be obtained although the resolution of the partial region is high and the resolution of other regions is low.

  The preview image generation unit 15 generates a preview image from the reference image obtained through the reference optical system 120c. When a change in the angle of view is instructed by the user, an image obtained through the reference optical system 120c serving as the reference viewpoint RP is trimmed and enlarged and displayed on the display unit 20, so that an image from the same viewpoint is always used as a preview image. Can be displayed.

  The information input unit 16 detects information input by the user selecting desired imaging conditions (aperture value, exposure time, etc.) and supplies the data to the system controller 19. The imaging control unit 17 moves a focus lens (not shown) included in each imaging optical system in the optical axis direction based on information from the system controller, and controls the aperture value of each imaging optical system. Furthermore, a necessary image is acquired by controlling the exposure time in the imaging unit 10.

  The image recording medium 18 stores a plurality of still images and moving images, and stores a file header when configuring an image file.

  As described above, the display unit 20 displays a preview image, displays an image obtained by imaging, a menu screen, information on a currently selected angle of view (focal length), and the like. The display unit 20 includes a display element such as a liquid crystal panel.

  The distance information calculation unit 21 includes a reference image selection unit 22, a corresponding point extraction unit 23, and a parallax amount calculation unit 24.

  The reference image selection unit 22 selects a reference image for subject distance calculation from a plurality of images (parallax images) having parallax obtained through a plurality of imaging optical systems.

  The corresponding point extraction unit 23 extracts corresponding pixels (corresponding points) corresponding to each other between the reference image for subject distance calculation and another parallax image (reference image).

  The parallax amount calculation unit 24 calculates the parallax amounts of all the corresponding pixels extracted by the corresponding point extraction unit 23, respectively. The distance information calculation unit 21 calculates a distance to the subject in the image (subject distance information) from the calculated amount of parallax.

  Next, a detailed configuration of the imaging optical system in the present embodiment will be described with reference to FIG. 4A and 4B respectively show a second imaging optical system (wide-angle optical system: hereinafter also referred to as a wide optical system) 120a and a first imaging optical system (telephoto optical system: hereinafter referred to as tele-optics). The cross section along the optical axis of 110a is also shown. The other first imaging optical systems 110b to 110d and second imaging optical systems 210b to 210d have the same configurations as the first imaging optical system 110a and the second imaging optical system 120a, respectively.

  4A and 4B, the left side is the subject side (object side) and is also referred to as the front side. The right side is the image side and is also called the rear side. F is a focus group, R is an image side group (rear group), and M is a reflecting member for bending the optical path. SP is an aperture stop, and IP is an image plane. The image plane IP corresponds to an imaging plane of an imaging element (photoelectric conversion element) such as a CCD sensor or a CMOS sensor. When using a silver salt film, it corresponds to the film surface. These are the same in the sectional views of the imaging optical systems of the other embodiments.

  5A and 5B are aberration diagrams of the wide and tele optical systems. In the aberration diagrams, d-line and g-line indicate the spherical aberration and distortion of the d-line and g-line, respectively. ΔM and ΔS indicate astigmatism on the meridional image surface and the sagittal image surface. The lateral chromatic aberration is indicated by the g-line. ω is a half angle of view, and Fno is an F number. The same applies to the aberration diagrams in the other examples.

  The wide optical system and the tele optical system are front-lens focus type optical systems in which the focus group F moves to the object side and the image side group R does not move (fixed) during focusing from an infinite subject to a short-distance subject. . In the following description, it is assumed that the lenses constituting each lens group are arranged in order from the object side to the image side.

  In the wide optical system shown in FIG. 4A, the focus group F includes a meniscus negative lens having a concave surface facing the image side, a positive lens having a biconvex shape and an Abbe number of 68.3, and a negative lens. It is configured. As a result, the optical system is reduced in size and distortion and chromatic aberration are effectively corrected. The image side group R includes a biconvex positive lens, a positive lens, and a negative lens.

  In the tele optical system shown in FIG. 4B, the focus group F includes a positive lens, a biconvex positive lens having an Abbe number of 68.3, and a negative lens. This reduces the size of the optical system and effectively corrects chromatic aberration. The image side group R includes a negative lens, a positive lens, and a meniscus negative lens having a concave surface facing the image side. In the tele-optical system, a reflecting member M for bending the optical path by 90 ° is disposed between the stop SP in the optical path and the image side group R.

Here, in the compound eye camera 1 of the present embodiment, the lens total length L of the second imaging optical system which is a straight optical system extending linearly without being bent and having the longest total lens length is 17.9 mm. The focal length f of the first imaging optical system that is a bending optical system is 23 mm. in this case,
L / f = 17.9 / 23 = 0.778 ≦ 1.4
And the condition of the formula (1) is satisfied.

  By disposing the reflecting member M for bending the optical path by 90 ° on the optical path of the first imaging optical system that satisfies the condition of Expression (1), the thickness of the compound eye camera 1 can be reduced. When the optical path is not bent, the total lens length of the first imaging optical system is 20.9 mm, which is longer than the total lens length of the second imaging optical system. For this reason, when the first imaging optical system is configured as a straight optical system that does not bend the optical path, it is obvious that the thickness of the compound-eye camera 1 increases. If the refractive power of each lens constituting the first imaging optical system is increased, the total length of the lens can be shortened, but correction of various aberrations such as chromatic aberration, coma aberration, and field curvature becomes difficult, resulting in a problem. Image performance deteriorates.

  In this embodiment, the size of the reflecting member M is reduced by disposing a negative lens having a strong refractive power on the image side (rear side) of the reflecting member M disposed in the first imaging optical system. ing. This avoids an increase in the thickness of the compound eye camera 1 due to the size of the reflecting member M. Further, the focus group of the first and second imaging optical systems is arranged on the object side with respect to the reflecting member M in the first imaging optical system.

Here, when the focal lengths of the focus groups included in any of the imaging optical systems i and h among all the imaging optical systems are f _Fi and f _Fh , these f _Fi and f _Fh are:
0.8 <f _Fh ² / f _Fi ² <1.2 (2)
Satisfy the following conditions.

  The condition of the expression (2) is a condition that must be satisfied in order to make the focusing movement amount the same in optical systems having different focal lengths with respect to the focus group of an arbitrary imaging optical system of the front lens focus type. If the upper limit of Expression (2) is exceeded, when the focus group is moved by the imaging optical system i by the same amount as the focus group is moved so as to be in focus by the imaging optical system h, the image is formed. In the optical system i, the amount of focus deviation exceeds the depth of focus range to the object side, resulting in defocus. If the lower limit of Expression (2) is not reached, when the focus group is moved by the imaging optical system i by the same amount as the focus group is moved so as to be in focus by the imaging optical system h, In the imaging optical system i, the amount of focus deviation exceeds the depth of focus range to the image side, resulting in defocus. In other words, by satisfying the condition of Expression (2), the amount of defocusing is within the depth of focus of each imaging optical system, and in-focus images with different angles of view can be acquired simultaneously with the movement amount of the same focus group. It becomes possible.

In the present embodiment, the focal length f _Fi of the focus group of the first imaging optical system is 9.30 mm, and the focal length f _Fh of the focus group of the second imaging optical system is −9.30 mm. Since the value of f _Fh ² / f _Fi ² is 1, the condition of Expression (2) is satisfied.

  By satisfying the above-described arrangement of the focus groups and the condition of the expression (2), the movement amounts of the focus groups of the imaging optical systems having different focal lengths can be made the same. For this reason, in a compound eye camera having a bending optical system as in this embodiment, it is possible to achieve both simultaneous acquisition of focused images with different angles of view and simplification of the focusing drive mechanism.

  Next, image composition processing for switching the imaging angle of view, which is mainly executed by the system controller 19 and the image composition unit 13 in accordance with a first image processing program as a computer program, will be described with reference to the flowchart of FIG.

  First, in step S <b> 100, when the system controller 19 receives an imaging condition and a signal instructing preparation for imaging (imaging preparation signal) from the user via the information input unit 16, the system controller 19 sets the imaging condition to the imaging controller 17. Transfer information and imaging preparation signal. The imaging control unit 17 sets the aperture values of the first and second imaging optical system groups, the exposure time (shutter speed) in the imaging unit 10 and the like based on the input imaging conditions. In this step, it is assumed that the user inputs any angle of view between the angle of view of the first imaging optical system group and the angle of view of the second imaging optical system group.

  Next, in step S <b> 101, when the system controller 19 receives a signal (imaging start signal) instructing the start of imaging from the user by the information input unit 16, the imaging controller 10 (imaging device) 10a to 10h) is started. The analog image signals output from the image sensors 10 a to 10 h are converted into digital image signals by the A / D converter 11 and then sent to the image processing unit 12. The image processing unit 12 generates images corresponding to the subject images respectively formed on the imaging elements 10a to 10h from the digital imaging signal. At this time, it is preferable that the image processing unit 12 performs processing for matching the luminance levels and white balance of the respective images. By this processing, it is possible to reduce adverse effects such as luminance unevenness and color unevenness in the image composition processing performed later.

  Next, in step S102, the system controller 19 determines whether or not the angle of view input by the user is the same as the angle of view (reference angle of view) of the second imaging optical system group including the reference optical system 120c. The reference field angle is preferably the widest field angle among the plurality of image forming optical system groups included in the compound-eye camera 1. As can be seen from FIG. 3, there is no information about the peripheral area of the image 120 with a wide field angle in the image 110 with a narrow field angle. For this reason, it is difficult to align a plurality of images obtained through an imaging optical system group having a wide angle of view with reference to an image obtained by the imaging optical system group having a narrow angle of view. If the user input angle of view is the same as the reference angle of view, the process proceeds to S103, and if not, the process proceeds to S104.

  In step S103, the image synthesis unit 13 synthesizes the images obtained through the other second imaging optical systems 120a, 120b, and 120d with the reference image obtained through the reference optical system 120c.

  Here, a method for synthesizing images obtained through the second imaging optical systems 120a, 120b, and 120d having the same angle of view as the reference optical system 120c will be described. FIGS. 7A and 7B show images obtained through the second imaging optical systems 120c and 120d when the subjects A and B are imaged using the compound-eye camera 1, respectively. On the image obtained from the second imaging optical systems 120c and 120d, the base length which is the distance between the optical axes between the second imaging optical systems 120c and 120d and the subject distance which is the distance to the subjects A and B The positions of the subjects A and B are different from each other by the geometrical relationship according to the above. Also, due to the different viewpoints of the two parallax images, a portion that appears on the image and a portion that is not so appear even in the same subject. For example, in the image (FIG. 7A) obtained through the second imaging optical system 120c, the surface A3 of the subject A and the surface B3 of the subject B are shown, but they are obtained through the second imaging optical system 120d. These planes are not shown in the resulting image (FIG. 7B). On the other hand, the image obtained through the second imaging optical system 120d (FIG. 7B) does not appear in the image obtained through the second imaging optical system 120c (FIG. 7A). B side B4 is shown. In this way, the fact that the subject area shown in one image is not shown in the other image due to the difference in viewpoint is called occlusion.

  In the image composition processing in the present embodiment, an image (FIG. 7A) obtained through the reference optical system 120c is used as a reference image. Then, a subject area (corresponding point) corresponding to the subject area shown in the reference image is extracted from the image obtained through the second imaging optical system that is not the reference optical system 120c, and this is extracted as a subject on the reference image. Composite to the area.

  A corresponding point extraction method will be described with reference to FIG. The left side of FIG. 8 shows the standard image 501 shown in FIG. 7A, and the right side shows the reference image 502 as the image shown in FIG. 7B combined with the standard image 501. Here, image coordinates (X, Y) indicating positions in the horizontal direction and the vertical direction on the image are used. Image coordinates (X, Y) are defined with the upper left of each image shown in FIG. 8 as the origin. Further, the luminance of the image coordinates (X, Y) in the standard image 501 is F1 (X, Y), and the luminance of the image coordinates (X, Y) in the reference image 502 is F2 (X, Y).

  A pixel (shown by hatching) in the reference image 502 corresponding to a pixel (shown by hatching) at an arbitrary coordinate (X, Y) in the reference image 501 is the luminance F1 (in the reference image 502) in the reference image 501 (shown by hatching). X, Y) is obtained by searching for a pixel having the most similar luminance. However, since it is difficult to simply search for a pixel having the most similar brightness to the brightness of an arbitrary pixel, a pixel with similar brightness is searched by the block matching method using pixels near the image coordinates (X, Y). To do.

For example, a block matching process when the block size is 3 will be described. The luminance values of a total of three pixels, that is, a pixel at an arbitrary coordinate (X, Y) in the reference image 501 and two pixels before and after (X−1, Y) and (X + 1, Y), respectively,
F1 (X, Y), F1 (X-1, Y), F1 (X + 1, Y)
It becomes.

On the other hand, the luminance values of the pixels in the reference image 502 shifted by k in the X direction from the coordinates (X, Y), (X-1, Y), (X + 1, Y) are respectively
F2 (X + k, Y), F2 (X + k-1, Y), F2 (X + k + 1, Y)
It becomes.

  At this time, the similarity E with the pixel at the coordinates (X, Y) in the reference image 501 is defined by the following equation (3).

  In this equation (3), the value of similarity E is calculated by sequentially changing the value of k, and the smallest similarity E is given (X + k, Y). Y) corresponds to a pixel (corresponding point). Here, the method of extracting corresponding points between images having parallax in the water direction has been described. However, corresponding points in the case of having parallax in the vertical direction or in the oblique direction can also be extracted.

  By synthesizing the subject area as the corresponding point obtained in this way with the reference image in units of pixels, the noise level in the reference image can be reduced, and the image quality of the output composite image can be improved. it can.

  The surface A3 of the subject A and the surface B3 of the subject B shown in FIG. 7A are obtained through the second imaging optical system 120d because there is no corresponding subject region as an occlusion region in FIG. 7B. Is not synthesized from the resulting image. Further, the surface B4 of the subject B, which is shown only in FIG. 7B, is not shown on the reference image, and therefore is not used for composition. In this way, the occlusion region cannot be synthesized, but in most other cases, an image obtained by imaging from a viewpoint different from the reference viewpoint RP can be synthesized with the reference image, so that the entire synthesized image As a result, the noise level can be reduced.

  If the parallax is so large that the block matching method cannot be used as it is, and the shape of the subject area differs greatly between the base image and the reference image, block matching is performed after geometric conversion such as affine transformation is performed on the reference image. The synthesis process may be performed using a method. In the same manner as the image composition method described above, an image obtained through the other second imaging optical systems 120a and 120b can also be composed with the reference image.

  On the other hand, in step S104 and step S105, the system controller 19 performs different angle-of-view image composition processing, which is image composition processing when the user input view angle is different from the reference view angle.

  Here, the different angle-of-view image composition processing will be described with reference to FIG. FIGS. 9A and 9B show images obtained through the first imaging optical systems 110c and 110d when the subjects A and B are imaged using the compound eye camera 1, respectively. FIG. 9C shows a reference image obtained through the reference optical system 120c when the same subjects A and B are imaged using the compound eye camera 1.

  The image obtained through the first imaging optical systems 110c and 110d has a narrower angle of view than the reference image obtained through the reference optical system 120c. For this reason, the sizes of the subjects A and B on the image are different, and these images cannot be combined as they are. Therefore, first, in step S104, the image composition unit 13 matches the reference image obtained through the reference optical system 120c with the user input angle of view (here, the angle of view of the first imaging optical system group). Trim and enlarge part of the image. 9D, a part (center region) of the reference image shown in FIG. 9C is trimmed, and the trimmed part corresponds to the angle of view of the first imaging optical systems 110c and 110d. An image that has been enlarged so as to be an image of an angle of view is shown. Although the resolution of the image is degraded by the trimming and enlargement processing, a new reference image (hereinafter referred to as an enlarged reference image) in which a subject having the same size as the subject on the image obtained through the first imaging optical systems 110c and 110d is captured. Can be obtained).

  In step S105, the image synthesis unit 13 synthesizes the images obtained through the first imaging optical systems 110a to 110d using the enlarged reference image obtained in step S104. The image composition method here is an image obtained through the first imaging optical systems 110a to 110d with respect to the enlarged reference image shown in FIG. 9D, similarly to the image composition method described in step S103. It is also possible to synthesize the subject area inside in units of pixels. Further, as described above, the resolution of the reference image shown in FIG. For this reason, mutually corresponding subject regions in the images obtained through the first imaging optical systems 110a to 110d are determined using the enlarged reference image, and these positions are aligned so that images other than the enlarged reference image are obtained. You may make it synthesize | combine (it does not synthesize | combine an expansion reference | standard image).

  Here, in this embodiment, the reference optical system 120c is disposed in the first region including the optical axis of the first imaging optical system group shown in FIG. Moreover, these imaging optical systems are two-dimensionally arranged so that their optical axes are parallel to each other. As a result, as shown in FIG. 9, all of the subject areas shown in the image obtained through the reference optical system 120c arranged at the reference viewpoint RP are all of the plurality of images obtained through the first imaging optical system group. It appears in one of them. That is, no occlusion occurs in the subject area in the reference image.

  For example, the planes A1 to A3 and the planes B1 to B3 shown in the enlarged reference image shown in FIG. 9D include the planes A1, A3, B1, and B3 in the image shown in FIG. Surfaces A2 and B2 are shown in the image shown in 9 (b). For this reason, all the subject areas shown in the enlarged reference image are obtained from one of the images in FIGS. 9A and 9B. Further, although the enlarged reference image is an image after trimming and enlargement processing, the subject position information from the reference viewpoint RP can be clearly determined, so that the alignment accuracy by the block matching method can be improved. Furthermore, since it is not necessary to perform viewpoint interpolation processing using distance information, it is possible to greatly reduce the processing load. Also, in the synthesis of images with different angles of view as described above, the composition is always performed based on the image obtained through the reference optical system 120c as the reference viewpoint RP, so that the subject position shift when switching the imaging angle of view is performed. Can be reduced.

  When the process proceeds from step S103 and step S105 to step S106, the system controller 19 stores the synthesized image in the recording medium 18 and ends the image synthesis process.

  Next, an intermediate angle-of-view image generation process for obtaining a continuous zoom effect performed mainly by the system controller 19, the image composition unit 13, and the intermediate angle-of-view image generation unit 14 will be described with reference to the flowchart of FIG. This intermediate angle of view image generation process is executed according to a second image processing program as a computer program.

  First, in step S <b> 200, when the imaging condition and the angle of view designated by the user are input from the information input unit 16, the system controller 19 transfers the information of the imaging condition and the angle of view to the imaging control unit 17. . Here, it is assumed that an intermediate field angle between the field angle of the first imaging optical system group and the field angle of the second imaging optical system group is input by the user.

  Next, in step S201, the imaging control unit 17 selects an imaging optical system that performs imaging according to the angle of view input by the user. Here, since the intermediate angle of view is input, all of the first imaging optical system group and the second imaging optical system group are selected as imaging optical systems used for imaging.

  Next, in step S <b> 202, the imaging control unit 17 starts exposure of the imaging device corresponding to the imaging optical system selected from the imaging unit 10. Then, the image processing unit 12 generates an image from the digital imaging signal input from the imaging device via the A / D converter 11. As a result, an image group having the same field angle obtained through the first imaging optical system group and an image group having the same field angle obtained through the second imaging optical system group are generated.

  At this time, it is preferable that the image processing unit 12 performs processing for matching the luminance levels and white balance of the respective images. By this processing, it is possible to reduce adverse effects such as luminance unevenness and color unevenness in the image composition processing performed later.

  Next, in step S203, the image composition unit 13 performs image composition processing on the image group obtained through the first imaging optical system group to generate a first composite image, and the second result. An image synthesis process is performed on the image group obtained through the image optical system group to generate a second synthesized image. The image composition process is the process performed in step S103 and steps S104 and S105 in FIG. At this time, both the first and second synthesized images having different angles of view are the same viewpoint image corresponding to an image captured from the reference viewpoint RP.

  Next, in step S204, the intermediate angle-of-view image generation unit 14 trims a region corresponding to the user input angle of view from the second synthesized image that is a wide-angle synthesized image obtained through the second imaging optical system group. The area is enlarged. Further, the intermediate angle-of-view image generation unit 14 reduces the first synthesized image, which is a telephoto synthesized image obtained through the first imaging optical system group, according to the user input angle of view.

  Next, in step S205, the intermediate angle-of-view image generation unit 14 reduces the enlarged image obtained by trimming and enlarging the second synthesized image and the first synthesized image by the above-described different angle-of-view image synthesizing process. An intermediate angle-of-view image is generated by combining the reduced image obtained by the processing. Then, this process ends.

  According to such an intermediate angle of view image generation process, an intermediate angle of view image corresponding to an image obtained by imaging from the reference viewpoint RP is generated. For this reason, even when the intermediate angle of view is selected by continuous zooming, an intermediate angle of view image with little subject position shift can be generated.

  Further, the preview image generation unit 15 generates a preview image from the reference image obtained through the reference optical system 120 c serving as the reference viewpoint RP and displays the preview image on the display unit 20. Therefore, even when the user instructs to change the angle of view (zooming), a preview image as an image from the same viewpoint can always be generated and displayed by trimming and displaying the reference image. Thus, since the preview image and the final view angle image at the time of changing the view angle are all generated as images obtained from the same reference viewpoint RP, the user can see an image with less discomfort due to the subject position shift. it can.

  Next, subject distance information recording processing mainly performed by the system controller 19 and the distance information calculation unit 21 will be described with reference to the flowchart of FIG. This subject distance information recording process is executed in accordance with a third image processing program as a computer program. Here, first, subject distance information recording processing using a parallax image obtained by the second imaging optical system group (second imaging optical systems 120c and 120d) that captures the widest subject space will be described.

  First, in step S300, the system controller 19 receives an imaging preparation signal input from the information input unit 16 by the user. In response to this, an image pickup signal from an image pickup element corresponding to the second imaging optical system 120c, 120d in the image pickup unit 10 is transferred to the image processing unit 12 via the A / D converter 11. The image processing unit 12 generates two parallax images obtained through the second imaging optical systems 120c and 120d from the imaging signal.

  Next, in step S301, the reference image selection unit 22 selects one of the two generated parallax images as a reference image for parallax amount calculation (that is, subject distance calculation). In this embodiment, an image obtained by the second imaging optical system 120c is selected as a reference image.

  Next, in step S302, the corresponding point extraction unit 23 detects corresponding pixels (corresponding points) between the standard image and the reference image, using the image obtained through the second imaging optical system 120d as a reference image. Corresponding pixels are, for example, pixels in which the same point of the subject A appears in two parallax images obtained by imaging the subject A. As a corresponding pixel detection method, the corresponding point extraction method described in the previous image composition process can be used.

  Next, in step S303, the parallax amount calculation unit 24 calculates the parallax amount between the extracted corresponding points. Specifically, the amount of parallax is calculated as a difference in pixel position between corresponding pixels of the standard image and the reference image.

  Next, in step S304, the distance information calculation unit 21 calculates the subject distance from the parallax amount calculated in step S303 and the focal lengths and baseline lengths of the second imaging optical systems 120c and 120d, which are known information. Is calculated. Here, the calculation of the subject distance when the second imaging optical systems 120c and 120d are used has been described. However, other imaging optical system pairs (for example, the second imaging optical system, for example) The subject distance can also be calculated using a pair of imaging optical systems 120a and 120b. When the above method is used for parallax images with different angles of view, a portion corresponding to a parallax image with a narrow angle of view is cut out from a parallax image with a wide angle of view, and corresponding pixels are extracted from the cut-out portion. It is desirable.

  According to the present embodiment, in a compound eye camera having a plurality of imaging optical systems having different focal lengths, both good imaging performance and reduction of the camera thickness when realizing high magnification as a whole camera are achieved. can do. In addition, a continuous zoom effect can be obtained without providing a zoom mechanism. Furthermore, it is possible to reduce the subject position shift on the image due to zooming.

  Further, according to the present embodiment, various imaging modes can be realized. For example, in the high dynamic range mode, imaging is performed a plurality of times while changing the exposure conditions of the imaging optical systems constituting the compound eye and the imaging elements corresponding thereto. Then, by synthesizing a plurality of images obtained by a plurality of imaging operations, an image having a wide dynamic range can be acquired. In the blur addition mode, an image that emphasizes the main subject can be obtained by adding blur to the background based on the calculated subject distance information. In the background removal mode, an image in which the background other than the main subject is removed based on the subject distance calculated as described above can be obtained. Further, in the stereoscopic imaging mode, left and right parallax images are acquired by the respective imaging optical systems that constitute the compound eyes arranged in the horizontal direction and the corresponding imaging elements. Then, an image can be stored as a stereoscopic image using an image with a narrow angle of view and a part of the image with the other wide angle of view corresponding thereto.

  Next, a compound eye camera that is Embodiment 2 of the present invention will be described. FIG. 12 shows the imaging optical unit 200 of the compound-eye camera of this embodiment in a front view. The imaging optical unit 200 is provided with first imaging optical systems 210a, 210b, 210c, and 210d, and second imaging optical systems 220a, 220b, 220c, and 220d. Further, the imaging optical unit 200 is provided with third imaging optical systems 230a, 230b, 230c, and 230d, and fourth imaging optical systems 240a, 240b, 240c, and 240d. The plurality of imaging optical systems 210a to 210d, 220a to 220d, 230a to 230d, and 240a to 240d are spaced apart from each other in a two-dimensional direction orthogonal to the respective optical axes. The optical axes of these imaging optical systems 210a to 210d, 220a to 220d, 230a to 230d, and 240a to 240d extend parallel to each other toward the object side.

First imaging optical system (hereinafter, collectively referred to as a first imaging optical group) 210 a to 210 d has a first field angle theta ₁ corresponding to the first focal length. The first field angle θ ₁ corresponds to the telephoto end field angle that is the narrowest field angle in the compound-eye camera of the present embodiment. The second imaging optical system (hereinafter also collectively referred to as a second imaging optical system group) 220a to 220d has a first image corresponding to a second focal length shorter than the first focal length. It has a _second angle of view θ ₂ wider than the angle θ ₁ . The second field angle corresponds to the wide-angle end field angle that is the widest field angle in the compound-eye camera of the present embodiment. The third imaging optical system (hereinafter collectively referred to as a third imaging optical system group) 230a to 230d has a third focal length shorter than the first focal length and longer than the second focal length. A corresponding third field angle θ ₃ is provided as an intermediate field angle that is wider than the first field angle and narrower than the second field angle. The fourth imaging optical system (hereinafter collectively referred to as a fourth imaging optical system group) 240a to 240d has a fourth focal length shorter than the first focal length and longer than the third focal length. The corresponding fourth field angle θ ₄ is an intermediate field angle that is wider than the first field angle and narrower than the third field angle. Note that the third and fourth imaging optical systems (intermediate field angle optical systems) 230a to 230d and 240a to 240d having an intermediate field angle wider than the first field angle are the second image forming as the wide angle optical system. It can be said that the second imaging optical system is different from the optical systems 220a to 220d.

  In this embodiment, the first to fourth imaging optical system groups are arranged in a matrix of horizontal 4 eyes × vertical 4 eyes to form a compound eye. Specifically, in the first column in the vertical direction, the first imaging optical system 210a, the third imaging optical system 230a, the fourth imaging optical system 240b, and the first imaging optical system 210b are provided. They are arranged in this order in the horizontal direction (from left to right in FIG. 12, the same applies hereinafter). In the second column, the fourth imaging optical system 240a, the second imaging optical system 220a, the second imaging optical system 220b, and the third imaging optical system 230b are arranged in this order in the horizontal direction. Has been placed. In the third column, the third imaging optical system 230c, the second imaging optical system 220c, the second imaging optical system 220d, and the fourth imaging optical system 240d are arranged in this order in the horizontal direction. Has been placed. In the fourth column, the first imaging optical system 210c, the fourth imaging optical system 240c, the third imaging optical system 230d, and the first imaging optical system 210d are arranged in this order in the horizontal direction. Has been placed.

  Furthermore, the first imaging optical systems 210a to 210d are configured as bending optical systems in which the optical path is bent in the direction indicated by the dotted line in FIG. Thus, by using the first imaging optical systems 210a to 210d having the telephoto end angle of view as bending optical systems, the thickness of the compound-eye camera can be reduced.

  In addition, the first imaging optical systems 210a to 210d are arranged on the outer periphery of the horizontal four-lens vertical four-lens imaging optical system group, and the other optical imaging systems adjacent to each other in the bending direction of their optical paths. The direction is different from the side where the (second to fourth imaging optical systems) is arranged. Accordingly, all the imaging optical systems 210a to 210d, 220a to 220d, 230a to 230d, and 240a to 240d are made dense while securing a space for bending the optical path of the first imaging optical systems 210a to 210d. It becomes possible to arrange. As a result, not only can the horizontal size (horizontal width) of the compound-eye camera be reduced, but also object position shift and object deformation when taking images at different angles of view can be reduced. Image composition processing can be easily performed by reducing subject position shift and subject deformation.

  Although not shown, the imaging unit of the compound-eye camera of the present embodiment configures imaging areas corresponding to the 16 imaging optical systems 210a to 210d, 220a to 220d, 230a to 230d, and 240a to 240d described above. 16 image sensors. Further, the configuration of the camera body and various processes are the same as those in the first embodiment, and thus description thereof is omitted.

  In FIG. 12, the positions of the optical axes of the first imaging optical systems 210a to 210d are connected by a solid line (straight line) extending in the vertical direction and the horizontal direction, and a region surrounded by the solid line is defined as a first region. To do. The positions of the optical axes of the second imaging optical systems 220a to 220d are connected by a broken line (straight line) extending in the vertical direction and the horizontal direction, and a region surrounded by the broken line is defined as a second region. Further, the positions of the optical axes of the third imaging optical systems 230a to 230d are connected by an alternate long and short dash line (straight line) extending in an oblique direction, and a region surrounded by the alternate long and short dash line is defined as a third region. Further, the positions of the optical axes of the fourth imaging optical systems 240a to 240d are connected by a two-dot chain line (straight line) extending in an oblique direction, and a region surrounded by the two-dot chain line is defined as a fourth region. The fourth region is a region surrounded by a line connecting the positions of the optical axes of the fourth imaging optical systems 240a to 240d, which are intermediate angle-of-view optical systems similar to the third imaging optical systems 230a to 230d. It can also be referred to as a third region. Further, in FIG. 12, the solid line is shown slightly shifted from the position of the optical axis of the first imaging optical system group so that each of the solid line, the broken line, the one-dot chain line, and the two-dot chain line is easy to see.

  The first to fourth imaging optical system groups are regions where all of the first to fourth regions overlap (the optical axes of the second imaging optical systems 220a to 220d are positioned at the center of the imaging optical unit 200). Area) to be present. In the present embodiment, the second imaging optical system that is one of the second imaging optical system groups having the widest field of view in which the optical axes are arranged in areas where all of the first to fourth areas overlap. (Specific second imaging optical system) 220c is a reference optical system, and the arrangement position is a reference viewpoint RP. Other configurations of the compound-eye camera of the present embodiment are the same as those of the first embodiment, and the description thereof is omitted.

  Also in the present embodiment, in the same manner as in the first embodiment, image synthesis processing and intermediate angle-of-view image generation processing are performed using an image obtained through the reference optical system 220c serving as the reference viewpoint RP as a reference image. (Omitted). Thus, when the imaging angle of view is switched from the angle of view of the second imaging optical group to the angle of view of the first, third and fourth imaging optical systems, the respective imaging optical systems It is possible to reduce the subject position shift on the composite image obtained through the group. In addition, since the optical axis of the reference optical system 220c serving as the reference viewpoint RP is disposed in an area where all the first to fourth areas overlap, the subject area shown in the reference image obtained through the reference optical system 220c is It is always included in one of the images obtained through other imaging optical systems. For this reason, it is possible to eliminate the influence of occlusion in the image composition using the reference image.

  Next, a detailed configuration of the imaging optical system in the present embodiment will be described with reference to FIG. FIGS. 13A and 13B show a second imaging optical system (wide angle optical system: hereinafter also referred to as a wide optical system) 220a and a third imaging optical system (intermediate angle of view optics) in this embodiment. The cross section along the optical axis of a wide middle optical system) 230a is shown. FIGS. 13C and 13D show a fourth imaging optical system (a telemiddle optical system among intermediate angle optical systems) 240a and a first imaging optical system (telephoto optical system: hereinafter, telephoto optical system). A cross section along the optical axis of 210a is also shown. The other first to fourth imaging optical systems 210b to 210d, 220b to 220d, 230b to 230d, and 240b to 240d have the same configurations as the first to fourth imaging optical systems 210a, 220a, 230a, and 240a, respectively. Have

  FIGS. 14A, 14B, 14C, and 14D are aberration diagrams of the wide, wide middle, telemiddle, and tele optical systems, respectively.

  Wide, wide middle, tele middle, and tele optical systems are front focus type optical systems in which the focus group F moves to the object side and the image side group R does not move (fixed) during focusing from an infinite object to a close object. It is a system. In the following description, it is assumed that the lenses constituting each lens group are arranged in order from the object side to the image side.

  In the wide optical system shown in FIG. 13A, the focus group F includes a meniscus negative lens having a concave surface facing the image side, a biconvex positive lens having an Abbe number of 68.3, and a negative lens. It is configured. As a result, the optical system is reduced in size and distortion and chromatic aberration are effectively corrected. The image side group R includes a biconvex positive lens, a positive lens, and a negative lens.

  In the wide middle optical system shown in FIG. 13B, the focus group F includes a biconcave negative lens, a biconvex positive lens with an Abbe number of 68.3, and a negative lens. This reduces the size of the optical system and effectively corrects chromatic aberration. The image side group R includes a meniscus negative lens having a concave surface facing the image side, a positive lens, and a meniscus negative lens having a concave surface facing the image side.

  In the telemiddle optical system shown in FIG. 13C, the focus group F includes a positive lens, a biconvex positive lens having an Abbe number of 68.3, and a negative lens. This reduces the size of the optical system and effectively corrects chromatic aberration. The image side group R includes a meniscus negative lens having a concave surface facing the image side, a positive lens, and a meniscus negative lens having a concave surface facing the image side.

  In the tele-optical system shown in FIG. 13D, the focus group F includes a negative lens, a positive lens having a biconvex shape and an Abbe number of 68.3, and a negative lens. This reduces the size of the optical system and effectively corrects chromatic aberration. The image side group R includes a negative lens, a positive lens, and a meniscus positive lens having a concave surface facing the image side. In the tele-optical system, a reflecting member M for bending the optical path by 90 ° is disposed between the stop SP and the image side group R in the optical path.

Here, in the compound eye camera of the present embodiment, the lens total length L of the fourth imaging optical system which is a straight optical system extending linearly without being bent and having the longest total lens length is 17.9 mm. The focal length f of the first imaging optical system that is a bending optical system is 27.5 mm. in this case,
L / f = 17.9 / 27.5 = 0.651 ≦ 1.4
And the condition of the formula (1) is satisfied.

  By disposing the reflecting member M for bending the optical path by 90 ° on the optical path of the first imaging optical system that satisfies the condition of Expression (1), the thickness of the compound-eye camera can be reduced. When the optical path is not bent, the total lens length of the first imaging optical system is 26.2 mm, which is longer than the total lens length of the fourth imaging optical system. For this reason, when the first imaging optical system is configured as a straight optical system that does not bend the optical path, it is clear that the thickness of the compound-eye camera increases. If the refractive power of each lens constituting the first imaging optical system is increased, the total length of the lens can be shortened, but correction of various aberrations such as chromatic aberration, coma aberration, and field curvature becomes difficult, resulting in a problem. Image performance deteriorates.

  In this embodiment, the size of the reflecting member M is reduced by disposing a negative lens having a strong refractive power on the image side (rear side) of the reflecting member M disposed in the first imaging optical system. ing. This avoids an increase in the thickness of the compound eye camera due to the size of the reflecting member M.

  According to the present embodiment, as in the first embodiment, in a compound eye camera having a plurality of imaging optical systems having different focal lengths, good imaging performance and a camera when realizing high magnification as the entire camera The thickness can be reduced. In addition, a continuous zoom effect can be obtained without providing a zoom mechanism. Furthermore, it is possible to reduce the subject position shift on the image due to zooming.

  Further, in this embodiment, since there are many imaging optical systems having different field angles as compared with the first embodiment, a higher zoom ratio can be easily obtained.

  Next, a compound eye camera that is Embodiment 3 of the present invention will be described. The arrangement of the imaging optical system in the imaging optical unit in the compound-eye camera of the present embodiment is the same as that of the second embodiment, and the same imaging optical system (however, the optical configuration is different) is the same as that of the second embodiment. Is attached. Further, since the configuration of the camera body and various processes are the same as those in the first embodiment, their description is omitted.

  FIGS. 15A and 15B show a second imaging optical system (wide angle optical system: hereinafter also referred to as a wide optical system) 220a and a third imaging optical system (intermediate field angle optical) in this embodiment. The cross section along the optical axis of a wide middle optical system) 230a is shown. 15C and 15D show a fourth imaging optical system (a telemiddle optical system among intermediate angle optical systems) 240a and a first imaging optical system (telephoto optical system: hereinafter referred to as a telephoto optical system). A cross section along the optical axis of 210a is also shown. The other first to fourth imaging optical systems 210b to 210d, 220b to 220d, 230b to 230d, and 240b to 240d have the same configurations as the first to fourth imaging optical systems 210a, 220a, 230a, and 240a, respectively. Have

  FIGS. 16A, 16B, 16C, and 16D are aberration diagrams of the wide, wide middle, telemiddle, and tele optical systems, respectively.

  Wide, wide middle, tele middle, and tele optical systems are front focus type optical systems in which the focus group F moves to the object side and the image side group R does not move (fixed) during focusing from an infinite object to a close object. It is a system. In the following description, it is assumed that the lenses constituting each lens group are arranged in order from the object side to the image side.

  In the wide optical system shown in FIG. 15A, the focus group F includes a negative meniscus lens having a concave surface facing the image side, a positive lens having a biconvex shape and an Abbe number of 68.3, and a negative lens. It is configured. As a result, the optical system is reduced in size and distortion and chromatic aberration are effectively corrected. The image side group R includes a biconvex positive lens, a positive lens, and a negative lens.

  In the wide middle optical system shown in FIG. 15B, the focus group F includes a biconcave negative lens, a biconvex positive lens with an Abbe number of 68.3, and a negative lens. This reduces the size of the optical system and effectively corrects chromatic aberration. The image side group R includes a meniscus negative lens having a concave surface facing the image side, a positive lens, and a meniscus negative lens having a concave surface facing the image side.

  In the telemiddle optical system shown in FIG. 15C, the focus group F includes a positive lens, a biconvex positive lens having an Abbe number of 68.3, and a negative lens. This reduces the size of the optical system and effectively corrects chromatic aberration. The image side group R includes a meniscus negative lens having a concave surface facing the image side, a positive lens, and a meniscus negative lens having a concave surface facing the image side.

  In the tele optical system shown in FIG. 15D, the focus group F includes a negative lens, a positive lens having a biconvex shape and an Abbe number of 68.3, and a negative lens. This reduces the size of the optical system and effectively corrects chromatic aberration. The image side group R includes a negative lens, a positive lens, and a meniscus positive lens having a concave surface facing the image side. In the tele-optical system, a reflecting member M for bending the optical path by 90 ° is disposed between the stop SP and the image side group R in the optical path.

Here, in the compound eye camera of the present embodiment, the lens total length L of the fourth imaging optical system which is a straight optical system extending linearly without being bent and having the longest total lens length is 17.9 mm. The focal length f of the first imaging optical system that is a bending optical system is 32.0 mm. in this case,
L / f = 17.9 / 32.0 = 0.560 ≦ 1.4
And the condition of the formula (1) is satisfied.

  By disposing the reflecting member M for bending the optical path by 90 ° on the optical path of the first imaging optical system that satisfies the condition of Expression (1), the thickness of the compound-eye camera can be reduced. When the optical path is not bent, the total lens length of the first imaging optical system is 28.6 mm, which is longer than the total lens length of the fourth imaging optical system. For this reason, when the first imaging optical system is configured as a straight optical system that does not bend the optical path, it is clear that the thickness of the compound-eye camera increases. If the refractive power of each lens constituting the first imaging optical system is increased, the total length of the lens can be shortened, but correction of various aberrations such as chromatic aberration, coma aberration, and field curvature becomes difficult, resulting in a problem. Image performance deteriorates.

  In this embodiment, the size of the reflecting member M is reduced by disposing a negative lens having a strong refractive power on the image side (rear side) of the reflecting member M disposed in the first imaging optical system. ing. This avoids an increase in the thickness of the compound eye camera due to the size of the reflecting member M.

  According to the present embodiment, as in the first embodiment, in a compound eye camera having a plurality of imaging optical systems having different focal lengths, good imaging performance and a camera when realizing high magnification as the entire camera The thickness can be reduced. In addition, a continuous zoom effect can be obtained without providing a zoom mechanism. Furthermore, it is possible to reduce the subject position shift on the image due to zooming.

  Further, in this embodiment, since there are many imaging optical systems having different field angles as compared with the first embodiment, a higher zoom ratio can be easily obtained.

  Next, a compound eye camera that is Embodiment 4 of the present invention will be described. The arrangement of the imaging optical system in the imaging optical unit in the compound-eye camera of the present embodiment is the same as that of the first embodiment, and the same imaging optical system (however, the optical configuration is different) is the same as that of the first embodiment. Is attached. Further, since the configuration of the camera body and various processes are the same as those in the first embodiment, their description is omitted.

  FIGS. 17A and 17B respectively show a second imaging optical system (wide-angle optical system: hereinafter referred to as a wide optical system) 120a and a first imaging optical system (telephoto optical system: hereinafter referred to as a tele-optical system). The cross section along the optical axis of 110a is shown. The other first imaging optical systems 110b to 110d and second imaging optical systems 210b to 210d have the same configurations as the first imaging optical system 110a and the second imaging optical system 120a, respectively. 18A and 18B are aberration diagrams of the wide and tele optical systems.

  The wide optical system and the tele optical system are front-lens focus type optical systems in which the focus group F moves to the object side and the image side group R does not move (fixed) during focusing from an infinite subject to a short-distance subject. . In the following description, it is assumed that the lenses constituting each lens group are arranged in order from the object side to the image side.

  In the wide optical system shown in FIG. 17A, the focus group F includes a meniscus negative lens having a concave surface facing the image side, a positive lens having a biconvex shape with an Abbe number of 68.3, and a negative lens. It is configured. As a result, the optical system is reduced in size and distortion and chromatic aberration are effectively corrected. The image side group R includes a biconvex positive lens, a positive lens, and a negative lens.

  In the tele-optical system shown in FIG. 17B, the focus group F includes a negative lens, a positive lens having a biconvex shape and an Abbe number of 68.3, and a negative lens. This reduces the size of the optical system and effectively corrects chromatic aberration. The image side group R includes a negative lens, a positive lens, and a meniscus negative lens having a concave surface facing the image side. In the tele-optical system, a reflecting member M for bending the optical path by 90 ° is disposed between the stop SP in the optical path and the image side group R.

Here, in the compound eye camera of the present embodiment, the lens total length L of the second imaging optical system which is a straight optical system extending linearly without being bent and having the longest total lens length is 17.9 mm. The focal length f of the first imaging optical system that is a bending optical system is 13 mm. in this case,
L / f = 17.9 / 13 = 1.377 ≦ 1.4
And the condition of the formula (1) is satisfied.

  By disposing the reflecting member M for bending the optical path by 90 ° on the optical path of the first imaging optical system that satisfies the condition of Expression (1), the thickness of the compound-eye camera can be reduced. When the optical path is not bent, the total lens length of the first imaging optical system is 19.8 mm, which is longer than the total lens length of the second imaging optical system. For this reason, when the first imaging optical system is configured as a straight optical system that does not bend the optical path, it is clear that the thickness of the compound-eye camera increases. If the refractive power of each lens constituting the first imaging optical system is increased, the total length of the lens can be shortened, but correction of various aberrations such as chromatic aberration, coma aberration, and field curvature becomes difficult, resulting in a problem. Image performance deteriorates.

  In this embodiment, the size of the reflecting member M is reduced by disposing a negative lens having a strong refractive power on the image side (rear side) of the reflecting member M disposed in the first imaging optical system. ing. This avoids an increase in the thickness of the compound eye camera 1 due to the size of the reflecting member M. Further, the focus group of the first and second imaging optical systems is arranged on the object side with respect to the reflecting member M in the first imaging optical system.

Here, the focal length f _Fi of the focus group of the first imaging optical system is 9.30 mm, and the focal length f _Fh of the focus group of the second imaging optical system is −9.30 mm. Since the value of f _Fh ² / f _Fi ² is 1, the condition of Expression (2) is satisfied.

  By satisfying the above-described arrangement of the focus groups and the condition of the expression (2), the movement amounts of the focus groups of the imaging optical systems having different focal lengths can be made the same. For this reason, in a compound eye camera having a bending optical system as in this embodiment, it is possible to achieve both simultaneous acquisition of focused images with different angles of view and simplification of the focusing drive mechanism.

  In each of the above-described embodiments, the case where a plurality of second imaging optical systems having the widest field angle are provided has been described. However, at least one second imaging optical system is provided, and this is used as a reference optical system. Just do it.

  Hereinafter, specific numerical values of Numerical Examples 1 to 4 corresponding to Embodiments 1 to 4 are shown. In each numerical example, i indicates the order of the surfaces counted from the object side. ri is the radius of curvature of the i-th optical surface (i-th surface). di is the axial distance between the i-th surface and the (i + 1) -th surface. ndi and νdi are respectively the refractive index and Abbe number of the material of the i-th optical member with respect to the d-line. f is a focal length, and Fno is an F number. ω is a half angle of view. An interval d of 0 indicates that the front and back surfaces are joined.

  In each embodiment, a reflecting mirror is used as the reflecting member M, and the optical path is bent 90 degrees by the mirror surface. However, in each numerical example, the optical path is shown in a developed state for convenience. By reflecting the mirror surface on the numerical example by tilting it by 45 degrees, the configuration is the same as the configuration shown in the optical cross-sectional view of each example.

  The surface with “*” in the surface number is an aspherical surface, and the shape of the aspherical surface is such that R is the radius of curvature and the aspherical coefficients K, A3, A4, A5, A6, A7, A8, A9, Suppose that A10, A11, and A12 are used and given by the following equation.

^{X = (H 2 / R)} / [1+ {1- (1 + K) (H / R) 2} 1/2]
+ A3 ・ H ³ + A4 ・ H ⁴ + A5 ・ H ⁵ + A6 ・ H ⁶ + A7 ・ H ⁷
+ A8 · H ⁸ + A9 · H ⁹ + A10 · H ¹⁰ + A11 · H ¹¹ + A12 · H ¹²
Note that “E ± XX” in each aspheric coefficient means “× 10 ± XX”. The focal length, the F number, and the angle of view represent values when focusing on an object at infinity. BF is a value obtained by converting the distance from the final lens surface to the image plane into air.
(Numerical example 1)
Wide optical system unit mm

Surface data surface number rd nd νd Effective diameter
1 * 40.382 1.30 1.62041 60.3 5.88
2 * 2.411 2.67 4.00
3 * 6.203 1.40 1.59240 68.3 3.87
4 * -11.433 0.50 3.49
5 * -62.116 0.80 1.80518 25.4 3.14
6 * 15.255 0.10 3.13
7 (Aperture) ∞ 0.10 3.14
8 * 6.018 1.20 1.64000 60.1 3.20
9 * -12.756 3.48 3.11
10 * 9.928 1.80 1.59240 68.3 4.65
11 * -11.658 0.50 4.57
12 * -28.136 1.00 1.84666 23.8 4.44
13 * 8.934 5.01
Image plane ∞

Aspheric data 1st surface
K = -8.61567e + 001 A 4 = -9.22230e-004 A 6 = 4.19663e-005
Second side
K = -9.30223e-001 A 4 = 7.19408e-003 A 6 = 6.36185e-004
Third side
K = 3.54414e + 000 A 4 = 2.81499e-003 A 6 = 2.34019e-004
4th page
K = -3.53906e + 000 A 4 = 1.43935e-003 A 6 = 1.07092e-004
5th page
K = 3.15676e + 000 A 4 = 1.79932e-003 A 6 = -9.65503e-004
6th page
K = 4.96423e + 001 A 4 = 1.09416e-003 A 6 = -7.97966e-004
8th page
K = -3.06847e + 000 A 4 = -1.51330e-004 A 6 = 3.84651e-004
9th page
K = 9.75797e + 000 A 4 = -3.28928e-004 A 6 = 5.50566e-004
10th page
K = -1.10481e + 001 A 4 = 2.90917e-004 A 6 = 5.26599e-004
11th page
K = 1.72650e + 001 A 4 = -4.08824e-003 A 6 = 9.11055e-004
12th page
K = -7.35482e + 001 A 4 = -1.54275e-002 A 6 = 3.85072e-004
Side 13
K = 7.43385e + 000 A 4 = -1.07701e-002 A 6 = 4.92519e-004

Various data focal length 5.20
F number 2.88
Half angle of view 36.69
Statue height 3.88
Total lens length 17.91
BF 3.06

Entrance pupil position 3.15
Exit pupil position -4.86
Front principal point position 4.94
Rear principal point position -2.14

Single lens Data lens Start surface Focal length
1 1 -4.19
2 3 6.99
3 5 -15.14
4 8 6.55
5 10 9.34
6 12 -7.91

Tele optics unit mm

Surface data surface number rd nd νd Effective diameter
1 * 885.216 1.30 1.62041 60.3 5.12
2 * -184.277 0.65 4.98
3 * 9.703 1.40 1.59240 68.3 4.74
4 * -6.989 0.10 4.45
5 * -8.737 0.80 1.80518 25.4 4.25
6 * -15.025 0.10 3.94
7 (Aperture) ∞ 2.00 3.72
8 (Mirror) ∞ 2.00 5.14
9 * -32.646 1.20 1.64000 60.1 3.39
10 * 3.695 3.80 3.29
11 * 16.114 1.80 1.59240 68.3 6.70
12 * 79.301 2.72 6.88
13 * 16.680 1.00 1.84666 23.8 7.23
14 * 38.339 (variable) 7.37
Image plane ∞

Aspheric data 1st surface
K = -9.00000e + 001 A 4 = -1.32156e-003 A 6 = -6.69651e-005

Second side
K = 9.00000e + 001 A 4 = 6.48865e-005 A 6 = -6.70297e-005

Third side
K = -2.82672e + 000 A 4 = 1.76947e-003 A 6 = 6.79069e-005

4th page
K = -2.58096e + 000 A 4 = 5.82121e-004 A 6 = -7.48352e-006

5th page
K = 3.68342e + 000 A 4 = 5.46659e-004 A 6 = 1.24159e-004

6th page
K = 1.19614e + 001 A 4 = -3.47191e-004 A 6 = 2.28721e-004

9th page
K = -9.00000e + 001 A 4 = 3.62343e-003 A 6 = -2.20092e-004

10th page
K = -9.40279e-001 A 4 = 1.02356e-002 A 6 = -2.24717e-004

11th page
K = 3.99141e + 000 A 4 = 1.58063e-003 A 6 = -2.04097e-005

12th page
K = 9.00000e + 001 A 4 = -5.32774e-004 A 6 = -1.92859e-005

Side 13
K = 2.27812e + 000 A 4 = -2.12327e-003 A 6 = 1.15833e-005

14th page
K = 9.00000e + 001 A 4 = -2.60011e-003 A 6 = 4.60592e-005

Various data focal length 23.00
F number 5.60
Half angle of view 9.56
Statue height 3.88
Total lens length 20.86
BF 2.00

Entrance pupil position 3.16
Exit pupil position -17.26
Front principal point position -1.30
Rear principal point position -21.00

Single lens Data lens Start surface Focal length
1 1 245.96
2 3 7.08
3 5 -27.49
4 9 -5.12
5 11 33.78
6 13 34.15

(Numerical example 2)
Wide optical system unit mm

Surface data surface number rd nd νd Effective diameter
1 * 40.382 1.30 1.62041 60.3 5.88
2 * 2.411 2.67 4.00
3 * 6.203 1.40 1.59240 68.3 3.87
4 * -11.433 0.50 3.49
5 * -62.116 0.80 1.80518 25.4 3.14
6 * 15.255 0.10 3.13
7 (Aperture) ∞ 0.10 3.14
8 * 6.018 1.20 1.64000 60.1 3.20
9 * -12.756 3.48 3.11
10 * 9.928 1.80 1.59240 68.3 4.65
11 * -11.658 0.50 4.57
12 * -28.136 1.00 1.84666 23.8 4.44
13 * 8.934 5.01
Image plane ∞

Aspheric data 1st surface
K = -8.61567e + 001 A 4 = -9.22230e-004 A 6 = 4.19663e-005
Second side
K = -9.30223e-001 A 4 = 7.19408e-003 A 6 = 6.36185e-004
Third side
K = 3.54414e + 000 A 4 = 2.81499e-003 A 6 = 2.34019e-004
4th page
K = -3.53906e + 000 A 4 = 1.43935e-003 A 6 = 1.07092e-004
5th page
K = 3.15676e + 000 A 4 = 1.79932e-003 A 6 = -9.65503e-004
6th page
K = 4.96423e + 001 A 4 = 1.09416e-003 A 6 = -7.97966e-004
8th page
K = -3.06847e + 000 A 4 = -1.51330e-004 A 6 = 3.84651e-004
9th page
K = 9.75797e + 000 A 4 = -3.28928e-004 A 6 = 5.50566e-004
10th page
K = -1.10481e + 001 A 4 = 2.90917e-004 A 6 = 5.26599e-004
11th page
K = 1.72650e + 001 A 4 = -4.08824e-003 A 6 = 9.11055e-004
12th page
K = -7.35482e + 001 A 4 = -1.54275e-002 A 6 = 3.85072e-004
Side 13
K = 7.43385e + 000 A 4 = -1.07701e-002 A 6 = 4.92519e-004

Various data focal length 5.20
F number 2.88
Half angle of view 36.69
Statue height 3.88
Total lens length 17.91
BF 3.06

Entrance pupil position 3.15
Exit pupil position -4.86
Front principal point position 4.94
Rear principal point position -2.14

Single lens Data lens Start surface Focal length
1 1 -4.19
2 3 6.99
3 5 -15.14
4 8 6.55
5 10 9.34
6 12 -7.91

Wide middle optical system unit mm

Surface data surface number rd nd νd Effective diameter
1 * -14.915 1.30 1.62041 60.3 6.70
2 * 69.090 2.67 6.19
3 * 5.672 1.40 1.59240 68.3 5.30
4 * -7.487 0.50 5.08
5 * -9.447 0.80 1.80518 25.4 4.14
6 * -22.100 0.10 3.74
7 (Aperture) ∞ 0.10 3.67
8 * 3.929 1.20 1.64000 60.1 3.60
9 * 2.484 3.48 3.41
10 * 6.037 1.80 1.59240 68.3 6.30
11 * 21.097 0.50 6.25
12 * 13.374 1.00 1.84666 23.8 6.25
13 * 6.940 5.99
Image plane ∞

Aspheric data 1st surface
K = 3.23218e + 000 A 4 = -3.05400e-004 A 6 = 4.53521e-005
Second side
K = -9.00000e + 001 A 4 = 1.59130e-004 A 6 = 5.15981e-005
Third side
K = -1.64767e + 000 A 4 = 2.27739e-003 A 6 = -6.09668e-006
4th page
K = -7.51140e + 000 A 4 = 2.83658e-004 A 6 = 7.41960e-005
5th page
K = 8.77500e + 000 A 4 = 1.90647e-004 A 6 = 7.09546e-004
6th page
K = 7.06211e + 000 A 4 = -1.29880e-003 A 6 = 6.54962e-004
8th page
K = -7.69118e-001 A 4 = -1.53255e-003 A 6 = -1.23634e-004
9th page
K = -9.82229e-001 A 4 = 2.51720e-004 A 6 = -1.95089e-004
10th page
K = -4.39310e + 000 A 4 = 2.05043e-003 A 6 = -1.72957e-005
11th page
K = 3.04604e + 001 A 4 = 9.28199e-004 A 6 = -1.81115e-004
12th page
K = 5.49088e + 000 A 4 = -1.18023e-003 A 6 = 3.43330e-005
Side 13
K = 2.34608e + 000 A 4 = -3.33103e-003 A 6 = 1.61864e-004

Various data focal length 10.50
F number 2.88
Half angle of view 20.26
Statue height 3.88
Total lens length 17.91
BF 3.06

Entrance pupil position 4.64
Exit pupil position -5.12
Front principal point position 1.66
Rear principal point position -7.44

Single lens Data lens Start surface Focal length
1 1 -19.66
2 3 5.67
3 5 -21.09
4 8 -15.62
5 10 13.67
6 12 -18.35

Telemiddle optics unit mm

Surface data surface number rd nd νd Effective diameter
1 * 36.807 1.30 1.62041 60.3 7.62
2 * -41.677 2.67 7.15
3 * 8.270 1.40 1.59240 68.3 5.38
4 * -7.910 0.50 4.98
5 * -9.885 0.80 1.80518 25.4 4.08
6 * -54.358 0.10 3.71
7 (Aperture) ∞ 0.10 3.66
8 * 5.124 1.20 1.64000 60.1 3.45
9 * 2.412 3.48 3.17
10 * 10.272 1.80 1.59240 68.3 6.40
11 * 16.743 0.50 6.42
12 * 9.281 1.00 1.84666 23.8 6.58
13 * 10.176 6.54
Image plane ∞

Aspheric data 1st surface
K = -9.00000e + 001 A 4 = 3.25623e-005 A 6 = 1.37046e-005
Second side
K = 6.54916e + 001 A 4 = 9.61894e-004 A 6 = 1.97095e-005
Third side
K = -5.20341e-001 A 4 = 2.82359e-003 A 6 = 1.62204e-005
4th page
K = -1.07451e + 001 A 4 = 1.35610e-003 A 6 = -1.75272e-005
5th page
K = 9.36306e + 000 A 4 = 3.65867e-003 A 6 = 3.57432e-004
6th page
K = -1.69149e + 001 A 4 = 1.12483e-003 A 6 = 6.25155e-004
8th page
K = -6.38373e-001 A 4 = -3.54965e-003 A 6 = 1.25622e-006
9th page
K = -9.28207e-001 A 4 = -1.83232e-003 A 6 = -1.58220e-004
10th page
K = 6.03894e-001 A 4 = 1.13103e-003 A 6 = 4.35985e-005
11th page
K = -8.36796e + 000 A 4 = 9.48431e-004 A 6 = -5.05453e-005
12th page
K = -2.24043e + 000 A 4 = -9.07528e-004 A 6 = 9.61281e-007
Side 13
K = 6.10242e + 000 A 4 = -2.60010e-003 A 6 = 1.92825e-005

Various data focal length 15.00
F number 2.88
Half angle of view 14.48
Statue height 3.88
Total lens length 17.91
BF 3.06

Entrance pupil position 6.90
Exit pupil position -6.27
Front principal point position -2.20
Rear principal point position -11.94

Single lens Data lens Start surface Focal length
1 1 31.71
2 3 7.05
3 5 -15.13
4 8 -8.61
5 10 40.66
6 12 82.43

Tele optics unit mm

Surface data surface number rd nd νd Effective diameter
1 * -136.617 1.30 1.62041 60.3 5.80
2 * 166.610 0.82 5.76
3 * 11.949 1.40 1.59240 68.3 5.61
4 * -8.122 0.35 5.42
5 * -9.020 0.80 1.80518 25.4 5.00
6 * -13.933 0.10 4.74
7 (Aperture) ∞ 2.81 4.57
8 (Mirror) ∞ 2.50 6.06
9 * -22.559 1.20 1.64000 60.1 3.96
10 * 5.319 3.80 3.88
11 * 15.712 1.80 1.59240 68.3 6.46
12 * -77.951 3.30 6.53
13 * 27.213 1.00 1.84666 23.8 6.93
14 * 37.408 (variable) 6.98
Image plane ∞

Aspheric data 1st surface
K = 9.00000e + 001 A 4 = -1.31577e-003 A 6 = -2.70364e-005

Second side
K = -7.12696e + 001 A 4 = -1.53371e-004 A 6 = -4.74331e-005

Third side
K = -2.89414e + 000 A 4 = 1.68174e-003 A 6 = -1.14849e-005

4th page
K = -1.79124e + 000 A 4 = 4.99910e-004 A 6 = 2.67567e-005

5th page
K = 3.96323e + 000 A 4 = 5.06661e-004 A 6 = 1.78272e-004

6th page
K = 9.11081e + 000 A 4 = 1.36805e-004 A 6 = 1.67056e-004

9th page
K = -9.00000e + 001 A 4 = 1.63734e-003 A 6 = -9.65418e-005

10th page
K = -3.67967e + 000 A 4 = 8.25410e-003 A 6 = -2.83572e-004

11th page
K = 9.32341e + 000 A 4 = 1.83248e-003 A 6 = -4.41940e-005

12th page
K = -9.00000e + 001 A 4 = 8.22363e-004 A 6 = -1.88270e-005

Side 13
K = 2.46513e + 001 A 4 = -1.18899e-003 A 6 = 1.50333e-005

14th page
K = 7.53470e + 001 A 4 = -1.20633e-003 A 6 = 2.52815e-005

Various data focal length 27.50
F number 5.60
Half angle of view 8.02
Statue height 3.88
Total lens length 26.19
BF 5.00

Entrance pupil position 3.53
Exit pupil position -17.38
Front principal point position -2.76
Rear principal point position -22.50

Single lens Data lens Start surface Focal length
1 1 -120.79
2 3 8.38
3 5 -34.26
4 9 -6.61
5 11 22.23
6 13 112.86

(Numerical example 3)
Wide optical system unit mm

Surface data surface number rd nd νd Effective diameter
1 * 40.382 1.30 1.62041 60.3 5.88
2 * 2.411 2.67 4.00
3 * 6.203 1.40 1.59240 68.3 3.87
4 * -11.433 0.50 3.49
5 * -62.116 0.80 1.80518 25.4 3.14
6 * 15.255 0.10 3.13
7 (Aperture) ∞ 0.10 3.14
8 * 6.018 1.20 1.64000 60.1 3.20
9 * -12.756 3.48 3.11
10 * 9.928 1.80 1.59240 68.3 4.65
11 * -11.658 0.50 4.57
12 * -28.136 1.00 1.84666 23.8 4.44
13 * 8.934 5.01
Image plane ∞

Aspheric data 1st surface
K = -8.61567e + 001 A 4 = -9.22230e-004 A 6 = 4.19663e-005
Second side
K = -9.30223e-001 A 4 = 7.19408e-003 A 6 = 6.36185e-004
Third side
K = 3.54414e + 000 A 4 = 2.81499e-003 A 6 = 2.34019e-004
4th page
K = -3.53906e + 000 A 4 = 1.43935e-003 A 6 = 1.07092e-004
5th page
K = 3.15676e + 000 A 4 = 1.79932e-003 A 6 = -9.65503e-004
6th page
K = 4.96423e + 001 A 4 = 1.09416e-003 A 6 = -7.97966e-004
8th page
K = -3.06847e + 000 A 4 = -1.51330e-004 A 6 = 3.84651e-004
9th page
K = 9.75797e + 000 A 4 = -3.28928e-004 A 6 = 5.50566e-004
10th page
K = -1.10481e + 001 A 4 = 2.90917e-004 A 6 = 5.26599e-004
11th page
K = 1.72650e + 001 A 4 = -4.08824e-003 A 6 = 9.11055e-004
12th page
K = -7.35482e + 001 A 4 = -1.54275e-002 A 6 = 3.85072e-004
Side 13
K = 7.43385e + 000 A 4 = -1.07701e-002 A 6 = 4.92519e-004

Various data focal length 5.20
F number 2.88
Half angle of view 36.69
Statue height 3.88
Total lens length 17.91
BF 3.06

Entrance pupil position 3.15
Exit pupil position -4.86
Front principal point position 4.94
Rear principal point position -2.14

Single lens Data lens Start surface Focal length
1 1 -4.19
2 3 6.99
3 5 -15.14
4 8 6.55
5 10 9.34
6 12 -7.91

Wide middle optical system unit mm

Surface data surface number rd nd νd Effective diameter
1 * -14.915 1.30 1.62041 60.3 6.70
2 * 69.090 2.67 6.19
3 * 5.672 1.40 1.59240 68.3 5.30
4 * -7.487 0.50 5.08
5 * -9.447 0.80 1.80518 25.4 4.14
6 * -22.100 0.10 3.74
7 (Aperture) ∞ 0.10 3.67
8 * 3.929 1.20 1.64000 60.1 3.60
9 * 2.484 3.48 3.41
10 * 6.037 1.80 1.59240 68.3 6.30
11 * 21.097 0.50 6.25
12 * 13.374 1.00 1.84666 23.8 6.25
13 * 6.940 5.99
Image plane ∞

Aspheric data 1st surface
K = 3.23218e + 000 A 4 = -3.05400e-004 A 6 = 4.53521e-005
Second side
K = -9.00000e + 001 A 4 = 1.59130e-004 A 6 = 5.15981e-005
Third side
K = -1.64767e + 000 A 4 = 2.27739e-003 A 6 = -6.09668e-006
4th page
K = -7.51140e + 000 A 4 = 2.83658e-004 A 6 = 7.41960e-005
5th page
K = 8.77500e + 000 A 4 = 1.90647e-004 A 6 = 7.09546e-004
6th page
K = 7.06211e + 000 A 4 = -1.29880e-003 A 6 = 6.54962e-004
8th page
K = -7.69118e-001 A 4 = -1.53255e-003 A 6 = -1.23634e-004
9th page
K = -9.82229e-001 A 4 = 2.51720e-004 A 6 = -1.95089e-004
10th page
K = -4.39310e + 000 A 4 = 2.05043e-003 A 6 = -1.72957e-005
11th page
K = 3.04604e + 001 A 4 = 9.28199e-004 A 6 = -1.81115e-004
12th page
K = 5.49088e + 000 A 4 = -1.18023e-003 A 6 = 3.43330e-005
Side 13
K = 2.34608e + 000 A 4 = -3.33103e-003 A 6 = 1.61864e-004

Various data focal length 10.50
F number 2.88
Half angle of view 20.26
Statue height 3.88
Total lens length 17.91
BF 3.06

Entrance pupil position 4.64
Exit pupil position -5.12
Front principal point position 1.66
Rear principal point position -7.44

Single lens Data lens Start surface Focal length
1 1 -19.66
2 3 5.67
3 5 -21.09
4 8 -15.62
5 10 13.67
6 12 -18.35

Telemiddle optics unit mm

Surface data surface number rd nd νd Effective diameter
1 * 36.807 1.30 1.62041 60.3 7.62
2 * -41.677 2.67 7.15
3 * 8.270 1.40 1.59240 68.3 5.38
4 * -7.910 0.50 4.98
5 * -9.885 0.80 1.80518 25.4 4.08
6 * -54.358 0.10 3.71
7 (Aperture) ∞ 0.10 3.66
8 * 5.124 1.20 1.64000 60.1 3.45
9 * 2.412 3.48 3.17
10 * 10.272 1.80 1.59240 68.3 6.40
11 * 16.743 0.50 6.42
12 * 9.281 1.00 1.84666 23.8 6.58
13 * 10.176 6.54
Image plane ∞

Aspheric data 1st surface
K = -9.00000e + 001 A 4 = 3.25623e-005 A 6 = 1.37046e-005
Second side
K = 6.54916e + 001 A 4 = 9.61894e-004 A 6 = 1.97095e-005
Third side
K = -5.20341e-001 A 4 = 2.82359e-003 A 6 = 1.62204e-005
4th page
K = -1.07451e + 001 A 4 = 1.35610e-003 A 6 = -1.75272e-005
5th page
K = 9.36306e + 000 A 4 = 3.65867e-003 A 6 = 3.57432e-004
6th page
K = -1.69149e + 001 A 4 = 1.12483e-003 A 6 = 6.25155e-004
8th page
K = -6.38373e-001 A 4 = -3.54965e-003 A 6 = 1.25622e-006
9th page
K = -9.28207e-001 A 4 = -1.83232e-003 A 6 = -1.58220e-004
10th page
K = 6.03894e-001 A 4 = 1.13103e-003 A 6 = 4.35985e-005
11th page
K = -8.36796e + 000 A 4 = 9.48431e-004 A 6 = -5.05453e-005
12th page
K = -2.24043e + 000 A 4 = -9.07528e-004 A 6 = 9.61281e-007
Side 13
K = 6.10242e + 000 A 4 = -2.60010e-003 A 6 = 1.92825e-005

Various data focal length 15.00
F number 2.88
Half angle of view 14.48
Statue height 3.88
Total lens length 17.91
BF 3.06

Entrance pupil position 6.90
Exit pupil position -6.27
Front principal point position -2.20
Rear principal point position -11.94

Single lens Data lens Start surface Focal length
1 1 31.71
2 3 7.05
3 5 -15.13
4 8 -8.61
5 10 40.66
6 12 82.43

Tele optics unit mm

Surface data surface number rd nd νd Effective diameter
1 * -83.016 1.30 1.62041 60.3 6.60
2 * 77.515 0.40 6.65
3 * 13.866 1.40 1.59240 68.3 6.63
4 * -9.207 1.01 6.53
5 * -9.074 0.80 1.80518 25.4 5.54
6 * -13.922 0.10 5.30
7 (Aperture) ∞ 3.47 5.14
8 (Mirror) ∞ 4.00 7.14
9 * -15.071 1.20 1.64000 60.1 4.39
10 * 9.484 3.80 4.27
11 * 19.105 1.80 1.59240 68.3 6.51
12 * 93.087 3.30 6.58
13 * 22.556 1.00 1.84666 23.8 7.15
14 * 40.505 (variable) 7.18
Image plane ∞

Aspheric data 1st surface
K = -9.00000e + 001 A 4 = -1.36080e-003 A 6 = -1.81288e-006

Second side
K = 9.00000e + 001 A 4 = -8.37079e-005 A 6 = -4.20703e-005

Third side
K = -3.96761e + 000 A 4 = 1.58446e-003 A 6 = -4.47001e-005

4th page
K = -7.35258e-001 A 4 = 3.24889e-004 A 6 = 1.97069e-005

5th page
K = 3.75533e + 000 A 4 = 5.11130e-004 A 6 = 1.76543e-004

6th page
K = 9.73367e + 000 A 4 = 2.91420e-004 A 6 = 1.53699e-004

9th page
K = -3.19918e + 001 A 4 = 3.56789e-003 A 6 = -9.40553e-005

10th page
K = -8.30308e + 000 A 4 = 8.33940e-003 A 6 = -9.52007e-005

11th page
K = 1.41230e + 001 A 4 = 2.24798e-003 A 6 = -7.06352e-005

12th page
K = -9.00000e + 001 A 4 = 1.64927e-003 A 6 = -8.06813e-005

Side 13
K = 3.60799e + 000 A 4 = 3.81929e-004 A 6 = -5.12132e-005

14th page
K = 8.84921e + 001 A 4 = 1.07239e-004 A 6 = -4.31916e-005

Various data focal length 32.00
F number 5.60
Half angle of view 6.90
Statue height 3.88
Total lens length 28.58
BF 5.00

Entrance pupil position 3.89
Exit pupil position -19.59
Front principal point position -5.75
Rear principal point position -27.00

Single lens Data lens Start surface Focal length
1 1 -64.41
2 3 9.56
3 5 -34.94
4 9 -8.93
5 11 40.22
6 13 58.62

(Numerical example 4)
Wide optical system unit mm

Surface data surface number rd nd νd Effective diameter
1 * 40.382 1.30 1.62041 60.3 5.88
2 * 2.411 2.67 4.00
3 * 6.203 1.40 1.59240 68.3 3.87
4 * -11.433 0.50 3.49
5 * -62.116 0.80 1.80518 25.4 3.14
6 * 15.255 0.10 3.13
7 (Aperture) ∞ 0.10 3.14
8 * 6.018 1.20 1.64000 60.1 3.20
9 * -12.756 3.48 3.11
10 * 9.928 1.80 1.59240 68.3 4.65
11 * -11.658 0.50 4.57
12 * -28.136 1.00 1.84666 23.8 4.44
13 * 8.934 5.01
Image plane ∞

Aspheric data 1st surface
K = -8.61567e + 001 A 4 = -9.22230e-004 A 6 = 4.19663e-005
Second side
K = -9.30223e-001 A 4 = 7.19408e-003 A 6 = 6.36185e-004
Third side
K = 3.54414e + 000 A 4 = 2.81499e-003 A 6 = 2.34019e-004
4th page
K = -3.53906e + 000 A 4 = 1.43935e-003 A 6 = 1.07092e-004
5th page
K = 3.15676e + 000 A 4 = 1.79932e-003 A 6 = -9.65503e-004
6th page
K = 4.96423e + 001 A 4 = 1.09416e-003 A 6 = -7.97966e-004
8th page
K = -3.06847e + 000 A 4 = -1.51330e-004 A 6 = 3.84651e-004
9th page
K = 9.75797e + 000 A 4 = -3.28928e-004 A 6 = 5.50566e-004
10th page
K = -1.10481e + 001 A 4 = 2.90917e-004 A 6 = 5.26599e-004
11th page
K = 1.72650e + 001 A 4 = -4.08824e-003 A 6 = 9.11055e-004
12th page
K = -7.35482e + 001 A 4 = -1.54275e-002 A 6 = 3.85072e-004
Side 13
K = 7.43385e + 000 A 4 = -1.07701e-002 A 6 = 4.92519e-004

Various data focal length 5.20
F number 2.88
Half angle of view 36.69
Statue height 3.88
Total lens length 17.91
BF 3.06

Entrance pupil position 3.15
Exit pupil position -4.86
Front principal point position 4.94
Rear principal point position -2.14

Single lens Data lens Start surface Focal length
1 1 -4.19
2 3 6.99
3 5 -15.14
4 8 6.55
5 10 9.34
6 12 -7.91

Tele optics unit mm

Surface data surface number rd nd νd Effective diameter
1 * -35.774 1.30 1.62041 60.3 5.05
2 * 37.734 3.51 4.66
3 * 7.617 1.40 1.59240 68.3 3.64
4 * -6.725 0.10 3.24
5 * -10.615 0.80 1.80518 25.4 3.06
6 * -21.488 0.10 2.72
7 (Aperture) ∞ 2.00 2.41
8 (Mirror) ∞ 2.00 3.11
9 * 12.088 1.20 1.64000 60.1 3.73
10 * 3.111 0.46 4.03
11 * 5.480 1.80 1.59240 68.3 4.80
12 * 21.689 0.10 4.86
13 * 9.258 1.00 1.84666 23.8 4.95
14 * 7.403 (variable) 4.96
Image plane ∞

Aspheric data 1st surface
K = -4.22016e + 001 A 4 = -6.65129e-004 A 6 = -1.78770e-005

Second side
K = -1.82578e + 001 A 4 = 1.13022e-003 A 6 = -1.17892e-006

Third side
K = 1.84236e + 000 A 4 = 3.02517e-003 A 6 = 3.51517e-005

4th page
K = -6.86464e + 000 A 4 = 1.47445e-003 A 6 = -1.36656e-004

5th page
K = 1.42942e + 001 A 4 = 2.21892e-003 A 6 = 3.37252e-004

6th page
K = 5.94880e + 001 A 4 = 1.39009e-003 A 6 = 6.28247e-004

9th page
K = 6.41798e + 000 A 4 = -8.18004e-003 A 6 = 3.83328e-004

10th page
K = -1.19651e + 000 A 4 = -3.85366e-003 A 6 = 1.29776e-004

11th page
K = 1.90082e + 000 A 4 = 3.75224e-003 A 6 = -3.67655e-004

12th page
K = 5.72213e + 001 A 4 = 1.34360e-003 A 6 = -4.64626e-006

Side 13
K = 6.43548e + 000 A 4 = -3.74427e-004 A 6 = -2.32107e-004

14th page
K = 4.83740e + 000 A 4 = -1.09159e-003 A 6 = -2.12345e-004

Various data focal length 13.00
F number 5.60
Half angle of view 16.60
Statue height 3.88
Total lens length 19.82
BF 4.05

Entrance pupil position 5.14
Exit pupil position -4.70
Front principal point position -1.19
Rear principal point position -8.95

Single lens Data lens Start surface Focal length
1 1 -29.40
2 3 6.26
3 5 -26.94
4 9 -6.91
5 11 11.89
6 13 -57.94

(Other examples)
The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

  Each embodiment described above is only a representative example, and various modifications and changes can be made to each embodiment in carrying out the present invention.

DESCRIPTION OF SYMBOLS 1 Compound eye imaging device 110a-110d, 210a-210d 1st imaging optical system 120a-120d, 220a-220d 2nd imaging optical system 230a-230d 3rd imaging optical system 240a-240d 4th imaging Optical system 10 Imaging unit

Claims (10)

A plurality of imaging optical systems having different focal lengths;
A compound-eye imaging device having imaging means including a plurality of imaging regions that respectively capture a plurality of object images formed by the plurality of imaging optical systems,
The plurality of imaging optical systems includes a plurality of first imaging optical systems whose optical paths are bent by reflection, and a plurality of second imaging optical systems whose optical paths are not bent,
In the optical axis direction view from the object side of the plurality of imaging optical systems,
The optical axis of at least one second imaging optical system among the plurality of second imaging optical systems is surrounded by a line connecting the positions of the optical axes of the plurality of first imaging optical systems. Is located within one area,
The compound-eye imaging apparatus, wherein a bending direction of the optical path in each of the first imaging optical systems is a direction toward the outside of the first region and is the same direction or a direction opposite to each other. A plurality of imaging optical systems having different focal lengths;
A compound-eye imaging device having imaging means including a plurality of imaging regions that respectively capture a plurality of object images formed by the plurality of imaging optical systems,
The plurality of imaging optical systems includes a plurality of first imaging optical systems whose optical paths are bent by reflection, and a plurality of second imaging optical systems whose optical paths are not bent,
Of the plurality of second imaging optical systems, the total length of the second imaging optical system having the longest optical system length is L, and the focal length of each of the plurality of first imaging optical systems is fi. When the plurality of first imaging optical systems,
1.4 ≧ L / fi
The compound eye imaging device characterized by satisfying the following conditions. In the optical axis direction view from the object side of the plurality of imaging optical systems,
The optical axis of at least one second imaging optical system among the plurality of second imaging optical systems is surrounded by a line connecting the positions of the optical axes of the plurality of first imaging optical systems. Is located within one area,
The bending direction of the optical path in each of the first imaging optical systems is a direction toward the outside of the first region, and is the same direction or a direction opposite to each other. Compound eye imaging device.   When viewed in the optical axis direction, the bending direction of the optical path in each of the first imaging optical systems is different from the side of the second imaging optical system adjacent to the first imaging optical system. The compound eye imaging apparatus according to claim 1, wherein the compound eye imaging apparatus is provided.   5. The optical axis of the plurality of second imaging optical systems is all disposed in the first region when viewed in the optical axis direction. 5. The compound eye imaging device described in 1. When one of the at least one second imaging optical system in which an optical axis is arranged in the first region is referred to as a specific second imaging optical system,
In the optical axis direction view, the specific region is within a region where the first region and a second region surrounded by a line connecting the optical axis positions of the plurality of second imaging optical systems overlap each other. 6. The compound eye imaging apparatus according to claim 1, wherein an optical axis of the second imaging optical system is disposed. The plurality of second imaging optical systems include a plurality of wide-angle optical systems having a field angle wider than the field angle of the first imaging optical system, the field angle of the first imaging optical system, and the A plurality of intermediate angle-of-view optical systems having an intermediate angle of view between the angle of view of the wide-angle optical system;
When the wide-angle optical system that is one of the at least one second imaging optical system in which an optical axis is disposed in the first region is referred to as a specific second imaging optical system,
When viewed in the optical axis direction, each of the first region, a second region surrounded by a line connecting the optical axis positions of the plurality of wide-angle optical systems, and each of the plurality of intermediate angle-of-view optical systems The optical axis of the specific second imaging optical system is disposed in a region overlapping with a third region surrounded by a line connecting the positions of the optical axes. The compound-eye imaging device according to any one of 3, 4, and 5.   An image obtained by synthesizing an image obtained by imaging through each of the plurality of imaging optical systems by using an image obtained by imaging through the specific second imaging optical system or a part thereof as a reference image The compound eye imaging apparatus according to claim 6, further comprising a combining unit.   An angle of view between the angles of view of the two imaging optical systems based on two images obtained by imaging through two imaging optical systems having different angles of view among the plurality of imaging optical systems. The compound-eye imaging apparatus according to claim 1, further comprising an image generation unit configured to generate an image corresponding to.   The distance calculating means for calculating a distance from a plurality of images having parallax to each other obtained by imaging through the plurality of imaging optical systems is provided. The compound eye imaging device described.