WO2015182488A1 - Multi-eye imaging optical system and multi-eye imaging device - Google Patents

Multi-eye imaging optical system and multi-eye imaging device Download PDF

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Publication number
WO2015182488A1
WO2015182488A1 PCT/JP2015/064664 JP2015064664W WO2015182488A1 WO 2015182488 A1 WO2015182488 A1 WO 2015182488A1 JP 2015064664 W JP2015064664 W JP 2015064664W WO 2015182488 A1 WO2015182488 A1 WO 2015182488A1
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optical system
imaging optical
lens
imaging
eye
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PCT/JP2015/064664
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French (fr)
Japanese (ja)
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佐野永悟
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コニカミノルタ株式会社
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B3/00Simple or compound lenses
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/18Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/222Studio circuitry; Studio devices; Studio equipment ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, TV cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
    • H04N5/225Television cameras ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, camcorders, webcams, camera modules specially adapted for being embedded in other devices, e.g. mobile phones, computers or vehicles

Abstract

Provided are a multi-eye imaging optical system that has ample aberration correction and negligible shading and crosstalk, even in a multi-eye imaging optical system in which general-purpose imaging elements are used; and a multi-eye imaging device in which the multi-eye imaging optical system is incorporated. This multi-eye imaging optical system (200), which forms multiple object images on a single imaging surface (I), has individual-eye imaging optical systems (20s), which are individual imaging optical systems corresponding to each of the multiple object images. The individual eye imaging elements (20s) satisfy the conditional expression -0.20 < Yd/EXPD < 0.50, where the value Yd is the maximum image height corresponding to an individual-eye imaging optical system (20s), and the value EXPD is the distance on the optical axis (AX) to the imaging surface (I) from the exit pupil location of the individual-eye imaging optical system (20s).

Description

Compound-eye imaging optical system and the compound-eye imaging device

The present invention is compound-eye imaging optical system combining a plurality of lens arrays having a plurality of lenses, respectively, and a multi-lens imaging apparatus incorporating such a compound-eye imaging optical system.

Recently, and multispectral imaging, the acquisition of 3D imaging and distance information using parallax, as to allow a plurality of polarization directions of the simultaneous photographing and the like, a plurality of object images by arranging a plurality of optical systems two-dimensionally compound-eye imaging optical system has been developed to form a. Such compound-eye imaging optical system imaging element used in, specifically designed to multi-lens imaging optical system for the individual imaging optical system (hereinafter, may be referred to as "single-eye imaging optical system") corresponding to there are those receiving surface are arranged is divided. However, in this type of device, since the sensors specific to a particular ommatidium image pickup optical system is designed, it is difficult to correspond to the other specifications ommatidium image pickup optical system. Further, from causing a dedicated imaging device from a cost becomes enormous. Therefore, in order to more expensive multi-lens imaging apparatus, a compound-eye imaging apparatus using a general-purpose image pickup device with a single light-receiving surface can be considered.

However, the general purpose of the imaging device, the pitch optimization of the microlenses on the light receiving surface is not performed. Therefore, units When the binocular imaging optical system large chief ray angle of incidence on the sensor surface, possibility that a problem occurs such as shading emerges. Further, a particular problem compound imaging optical system, light from outside the imaging angle in the ommatidium image pickup optical system is incident on the lens of the ommatidium image pickup optical system which is adjacent the internal reflection, a ghost, in some cases the phenomenon called cross-talk occurs. Patent Document 1, on a single imaging element, compound-eye imaging optical system is disclosed in which to place the array lens formed integrally a plurality of single-eye imaging optical system. However, array lenses constituting the compound-eye imaging optical system described in Patent Document 1 is one configuration, not a been considered designed for chief ray angle of incidence. In addition, are also measures for cross-talk Orazu, it can not be said that aberration correction is also sufficient.

JP 2001-78212 JP

The present invention, shading and crosstalk hardly occurs even in the compound-eye imaging optical system using a general-purpose imaging element, a compound-eye imaging device incorporating a multi-eye image pickup optical system has been made also sufficiently aberration correction and the compound-eye imaging optical system an object of the present invention is to provide.

To achieve the above object, the compound eye image pickup optical system according to the present invention is a compound-eye imaging optical system for forming a plurality of object images on a single imaging surface, each imaging, each corresponding to a plurality of object images an optical system, each of the imaging optical system satisfies the following conditional expression.
-0.20 <Yd / EXPD <0.50 ... (1)
However,
Yd: maximum image height EXPD corresponding to each of the imaging optical system is a distance on the optical axis from the exit pupil position of each image pickup optical system to the imaging surface

In the compound-eye imaging optical system, it is assumed that the use of general-purpose imaging device having a single imaging surface, by using an image pickup device such generic imaging area each of the imaging optical system compared to using the imaging element of the divided specifically designed use, very inexpensive can be obtained compound imaging optical system. Also, easy to correspond to the optical system of various specifications in a single image sensor. Moreover, compared with a plurality of imaging optical systems, and the case of arranging a plurality of image pickup elements corresponding to the respective imaging optical systems two-dimensionally easily take the synchronization time of imaging, a time lag of the imaging of a plurality of object images it is possible to suppress. Note that the time lag in the imaging of a plurality of object images is generated, it can not be obtained an accurate distance measurement accuracy, there is a possibility that a problem occurs such can not be obtained an accurate multi-spectral information.
Condition (1) is a conditional expression for appropriately setting the principal ray incident angle of each of the imaging optical system. A value of the expression (1) is below the upper limit may be the principal ray incident angle of each of the imaging optical system does not become too large, suppressing shading or the like in the peripheral portion of the image obtained. Moreover, the fact that the chief ray angle of incidence is small, light outside the photographing field angle becomes difficult to enter into the imaging area next to the imaging optical system, it is possible to suppress the crosstalk. On the other hand, when the value of the conditional expression (1) takes a negative value, so that the exit pupil position becomes excessive infinite, the principal ray coming emitted as convergent light from each of the imaging optical system. Sonaruto, it comes to towards the effective diameter of the image pickup optical system than the maximum image height increases. Therefore, a value of the expression (1) exceeds the lower limit, it becomes possible to reduce the effective diameter of each of the imaging optical system, to minimize wasted space that occurs on a single imaging surface can be, it is possible to effectively use the imaging region. As a result, if the same imaging plane, it is possible to increase the number of the imaging optical system, the imaging optical system can increase the number of pixels per Invite ommatidium they are the same number. Incidentally, the more the number of the imaging optical system, or it is possible to increase the number of colors bands at correspondingly multi-spectral camera applications, benefits such or can increase the variation in the polarization direction occurs in a multi-polarized image acquisition applications .

In a specific aspect or aspect of the present invention, the compound-eye imaging optical system, each of the imaging optical system has two or more lenses, at least one of the individual imaging optical system satisfies the following conditional expression to.
0.68 <ΦLmax / 2Yd <1.70 ... (2)
However,
FaiLmax: The most effective of the large lens diameter effective diameter Yd: the maximum image height corresponding to each imaging optical system in this case, by configuring each of the imaging optical system with two or more lenses, performs satisfactory aberration correction while, it is possible to obtain a small compound imaging optical system of a principal ray incident angle.
Condition (2) is a conditional expression for appropriately setting the effective diameter of the image pickup optical system to the maximum image height of the individual imaging optical system. A value of the expression (2) is below the upper limit, the maximum effective diameter of the imaging optical system is not too large, it is possible to reduce the non-use area on the imaging surface. Here, the non-use area, means a portion excluding a portion used as the image of the image circle of the individual imaging optical system. On the other hand, when a value of the expression (2) exceeds the lower limit, the effective diameter of the imaging optical system it does not become too small for the imaging element. Incidentally, when the effective diameter of the image pickup optical system is smaller with respect to the imaging device, ray angle coming emitted from the lens becomes large correspondingly. In order to obtain a good image-side telecentric characteristics, it is important to the imaging optical system does not become too small. The conditional expression (2) need not be satisfied with all of the imaging optical system, may be one part of an imaging optical system satisfies. As part of the imaging optical system satisfies the range of the conditional expression (2) may be arranged in a nested between the large imaging optical system of the effective diameter outside the range of the conditional expression (2).

Further, in another aspect of the present invention, each of the imaging optical system has an aperture stop, satisfy the following condition.
1.00 <DAS / f <3.00 ... (3)
However,
DAS: distance along the optical axis from the aperture stop to the image pickup plane f: focal length condition of the individual overall image pickup optical system (3) is appropriately setting the distance on the optical axis of the aperture diaphragm and the imaging surface it is a conditional expression for. A value of the expression (3) exceeds the lower limit, prevents the aperture diaphragm position is too close to the imaging surface, it is possible to obtain a good principal ray incident angle characteristics. Therefore, it is possible to suppress such (mismatch between the original luminance and the image signal i.e., target image) shading at the periphery. On the other hand, when a value of the expression (3) is lower than the upper limit, the aperture stop position is not too far away with respect to the imaging plane, it is possible to reduce the overall length of the imaging optical system as a result.

In still another aspect of the present invention is formed of at least two or more array lens are integrally formed is stacked in the optical axis direction each imaging optical system. In this case, it becomes possible to arrange the respective image pickup optical system with high accuracy, alignment of the lenses constituting the imaging optical system is simplified.

In still another aspect of the present invention, an aperture stop is disposed between the lens, two lenses adjacent to the aperture stop are both having concentric lens shape with respect to the aperture stop. In this case, the coma aberration, so the distortion can be corrected favorably.

To achieve the above object, an imaging apparatus according to the present invention comprises the above compound imaging optical system, and a single imaging element.

According to the imaging apparatus, because it incorporates a multi-lens imaging optical system according to the present invention, it is possible to suppress the time lag with respect to the acquisition of the video signal between the various specifications likely to correspond to the optical system, a plurality of object images , it is possible to obtain an inexpensive compound-eye imaging apparatus.

1A is a side cross-sectional view of the imaging apparatus according to an embodiment of the present invention, FIG. 1B is a plan view of a lens array laminated structure constituting the compound-eye imaging optical system. 2A is a cross-sectional view illustrating one single-eye imaging optical system constituting the compound-eye imaging optical system, Figure 2B, the arrangement of the portion to be used as an image on the imaging surface of each imaging optical system and the imaging device is a conceptual diagram illustrating that, FIG. 2C is an enlarged view of the periphery of the image circle of the imaging surface, FIG. 2D is a view for explaining a modification of the individual imaging optical system. It is a diagram illustrating an imaging apparatus equipped with the imaging device shown in FIG. 1A or the like. 4A is a cross-sectional view of an individual imaging optical system constituting the compound-eye imaging optical system of Embodiment 1, FIG. 4B ~ 4D are spherical aberration of each of the imaging optical system shown in FIG. 4A, astigmatism, and It shows the distortion aberration. 5A is a cross-sectional view of an individual imaging optical system constituting the compound-eye imaging optical system of Embodiment 2, FIG. 5B ~ 5D are spherical aberration of each of the imaging optical system shown in FIG. 5A, astigmatism, and It shows the distortion aberration. 6A is a cross-sectional view of an individual imaging optical system constituting the compound-eye imaging optical system of Example 3, FIG. 6B ~ 6D are spherical aberration of each of the imaging optical system shown in FIG. 6A, astigmatism, and It shows the distortion aberration. 7A is a cross section view of an individual imaging optical system constituting the compound-eye imaging optical system of Example 4, FIG. 7B ~ 7D are spherical aberration of each of the imaging optical system shown in FIG. 7A, astigmatism, and It shows the distortion aberration. 8A is a cross-sectional view of an individual imaging optical system constituting the compound-eye imaging optical system of Example 5, FIG. 8B ~ 8D is spherical aberration of the individual imaging optical system shown in FIG. 8A, astigmatism, and It shows the distortion aberration. It is a conceptual diagram illustrating a modification of the arrangement of the imaging surface of each imaging optical system and the image pickup device.

DESCRIPTION compound-eye imaging device incorporating a multi-eye image pickup optical system and which is an embodiment of the present invention will be described with reference to the drawings.

Compound-eye imaging device 100 shown in FIGS. 1A and 1B, taken a plurality of images by using a plurality of imaging optical systems, is intended for reconstitution into a single image. Compound-eye imaging device 100 has a rectangular plate shape or block-like outer shape, the lens array laminated structure 20, a rear aperture 30, a filter 40, a solid-state imaging device 50, and a holder 60. Of these, the lens array laminated structure 20, the rear diaphragm 30, the filter 40, the compound-eye imaging optical system 200 is constituted. Incidentally, the compound-eye imaging optical system 200 of the following describes an example obtained by laminating two lens array, not limited to this and may be formed by laminating, for example, three or more array lens.

Lens array laminated structure 20 is to form an object image. Lens array laminated structure 20 includes a first lens array 21, a second lens array 22, and an intermediate aperture 25. These members 21, 22 and 25 are stacked in the optical axis AX direction. Lens array laminated structure 20 has a function for forming an image of a subject imaging surface of the solid-state imaging device 50 (the projection surface) I. In the present embodiment, there is a case where the lens array laminated structure 20 itself is referred to as a multi-lens imaging optical system.

The first lens array 21 of the lens array laminated structure 20 is disposed on the most object side of the compound-eye imaging device 100. The first lens array 21 is a molded article obtained by integrating a plurality of first single-eye lens 121 are two-dimensionally arranged in a direction perpendicular to the optical axis AX, with the outline of a rectangle or square. Each first piece intraocular lens 121 includes a lens body 21a and a flange portion 21b. The one eye lenses 121 adjacent are integrated is connected through a flange portion 21b. Lens body 21a is an object side has a first optical surface 21c is a non-spherical convex, and a second optical surface 21d the image side is a concave aspheric surface. Periphery of the flange portion 21b of the lens body 21a has a first and second optical surfaces 21c, a pair of flat flange surface 21e extending perpendicular to the optical axis AX around the 21d, 21f.

As shown in FIG. 1A, the second lens array 22 is disposed on the image side of the first lens array 21. The second lens array 22, like the first lens array 21 is an optical axis molded article integrating a plurality of the two-lens 122 are two-dimensionally arranged in a direction perpendicular to the AX, rectangular or square It has a profile. Each second piece intraocular lens 122 includes a lens body 22a and the flange portion 22b. The two-lens 122 adjacent are integrated is connected through a flange portion 22b. Lens body 22a is the object side and a third optical surface 22c is a non-spherical convex, and a fourth optical surface 22d the image side is aspheric convex. Flange portion 22b around the lens body 22a has a third and a fourth optical surface 22c, and extends perpendicular to the optical axis AX on the periphery of 22d pair of flat flange surface 22e, 22f.

As shown in FIGS. 1A and 2A, with any one of the one eye lenses 121 constituting the first lens array 21, the two being disposed on the same optical axis AX in the second lens array 22 side the ophthalmic lens 122, which functions alone as a single imaging lens for forming an object image, i.e. singly number to allow imaging the eye imaging optical system 20s (individual imaging optical system constituting the compound-eye imaging optical system).

The first and second lens arrays 21 and 22, a resin, and is formed of glass or the like. The first and second lens arrays 21 and 22, when formed of resin, is molded by press molding, for example by injection by molding and the mold or a resin mold or the like.

A first lens array 21 and the second lens array 22, are laminated through an adhesive layer 24 having a light shielding property. The adhesive layer 24 is formed by a light curing resin having for example a light-shielding property by absorption. In order to ensure the light shielding property by absorption, for example, inorganic pigments and organic pigments such as black is added to the photocurable resin.

Intermediate aperture 25 is a rectangular plate member, a first lens array 21 is disposed between the second lens array 22. That is, the intermediate diaphragm 25 has a aperture stop S of the inner aperture is disposed between the lens and the lens. Intermediate aperture 25 is in close contact with the first and second lens arrays 21 and 22 via the adhesive layer 24. In the intermediate diaphragm 25, first and second lens body 21a of the first and second lens arrays 21 and 22, at a position corresponding to 22a are formed circular opening 25a. Intermediate aperture 25 is a plate-like member made of metal, resin, or the like, it or black or dark material has a light absorption property in itself, those coated surfaces in black or dark color is used. In the present embodiment, the intermediate diaphragm 25 (aperture stop S) into two ommatidium lens adjacent both have a concentric lens shape with respect to the intermediate diaphragm 25 preferred.

Rear diaphragm 30 is a rectangular plate member, is provided between the lens array laminated structure 20 and the filter 40. In the rear aperture 30, a rectangular opening 30a is formed at a position corresponding to the first and first and second lens body 21a of the second lens array 21, 22, 22a. The material of the rear diaphragm 30 may be the same as the intermediate diaphragm 25. Rear diaphragm 30 blocks the stray light incident on the solid-state imaging device 50.

Filter 40 is a rectangular plate member, is provided between the rear diaphragm 30 and the solid-state image sensor 50. Filter 40 is an infrared cut filter having, for example, it functions to reflect infrared radiation.

The solid-state imaging device 50 is used for detecting an object image formed by the ommatidium image pickup optical system 20s constituting the lens array laminated structure 20. The photoelectric conversion unit constituting the imaging plane I of the solid-state imaging device 50 such as a CCD or CMOS (not shown), the incident light to photoelectric conversion for each RGB, and outputs the analog signal. As shown in Figure 2B, the imaging plane I, i.e. the photoelectric conversion portion of the solid-state imaging device 50 is of a single no boundary, each sensor region 51 has a portion to be used as an image. In the imaging surface I, a portion excluding a portion used as the image of the image circle ImC formed by ommatidium image pickup optical system 20s is in the non-use area NIM (hatched dot pattern of FIG. 2C). The solid-state imaging device 50, the front side as shown in FIG. 1A is fixed by the wiring board (not shown) on the back side is covered with the parallel plate F a cover glass. The wiring board, or supplied with voltage and signals for driving the solid-state imaging device 50 from an external circuit, the detection signal and outputs to the external circuit.

Holder 60, the lens array laminated structure 20, the rear diaphragm 30, a frame member for holding and housing the filter 40 and the solid-state imaging device 50,. The holder 60, the recess 60a having a plurality of stepped portions T1, T2, T3 is formed, the holder 60 has a squares outer shape as a whole. In the recess 60a, the lens array laminated structure 20, the rear diaphragm 30, the filter 40 and the solid-state imaging device 50, is set in order. Each member 20, 30, 40, 50 are positioned by the recess 60a stepped portion T1, T2, T3. The holder 60, circular opening 60b is formed in a lattice point positions corresponding to a plurality of optical surfaces of the lens array laminated structure 20. Holder 60, light blocking resin, is formed, for example, liquid crystal polymer (LCP) containing a colorant of a black pigment and polyphthalamide (PPA) and the like.

Hereinafter, with reference to FIG. 3, the imaging and processing device 300 and its operation equipped with the compound-eye imaging device 100.

Imaging and processing device 300 includes a compound-eye imaging device 100, the microprocessor 81, an interface 82, a display 83.

The solid-state imaging device 50, the respective images formed on the sensor region 51 constituting the imaging section (or sensor element) 52 is converted into an electric signal, and outputs to the microprocessor 81. Microprocessor 81 processes based on the input signal to a predetermined processing program stored in the ROM of the microprocessor 81, to reconstruct each image into one image. Thereafter, the microprocessor 81 outputs one image reconstructed to the display 83 or the like through the interface 82. Further, the microprocessor 81 is temporarily stored in the internal RAM of various operation results in performing the processing based on the processing program. As the reconstruction process of the image by the microprocessor 81, for example, cutting out a rectangular area required from each image processing, and cut out those including a process of reconstructing an image based on the rectangular image to each parallax information such as , it may be a known process.

It will be described in detail multi-eye image pickup optical system 200. As shown in FIG. 1B or the like, to the compound-eye imaging optical system 200 is provided with a plurality of single-eye imaging optical system 20s. As shown enlarged in FIG. 2A, the ommatidium image pickup optical system 20s includes a first piece intraocular lens 121 which is an element of the first lens array 21 which is disposed closest to the object side, the image of the first lens array 21 and a second two-lens 122 which is an element of the second lens array 22 arranged on the side.

Ommatidium image pickup optical system 20s may number the maximum image height corresponding to a binocular imaging optical system 20s and a value Yd, value the distance on the optical axis AX from the exit pupil position of the ommatidium image pickup optical system 20s to the imaging surface I EXPD as, it satisfies the following conditional expression (1).
-0.20 <Yd / EXPD <0.50 ... (1)

Condition (1) is a conditional expression for appropriately setting the principal ray incident angle of an individual imaging optical system ommatidium image pickup optical system 20s. By value Yd / EXPD of the condition (1) is lower than the upper limit, not too large chief ray angle of incidence of ommatidium image pickup optical system 20s, to suppress shading and the like at the periphery of the image obtained it can. Moreover, the fact that the chief ray angle of incidence is small, light outside the photographing field angle becomes difficult to enter the next ommatidium image pickup optical system imaging area or sensor area 51 of the 20s, it is possible to suppress the crosstalk. On the other hand, when the value of the conditional expression (1) takes a negative value, the exit pupil position becomes excessive infinite come chief ray is emitted as convergent light toward the imaging area from the ommatidium image pickup optical system 20s to become. Sonaruto, it comes to towards the effective diameter of even ommatidium image pickup optical system 20s than the maximum image height increases. Therefore, a value of the expression (1) exceeds the lower limit, it becomes possible to reduce the effective diameter of the single-eye imaging optical system 20s, as possible wasted space that occurs on a single imaging surface I reduced it can be, it is possible to effectively use the imaging region. As a result, if the same imaging plane I, can increase the number of ommatidia imaging optical system 20s, ommatidium image pickup optical system 20s can increase the number of pixels per single-eye if the same number. Here, wasted space comprises a non-use area nIm within the image circle ImC described above and a region outside the image circle ImC in the imaging plane I. Incidentally, ommatidium image pickup optical system 20s may be the configuration is different. The more the number of ommatidium image pickup optical system 20s, or can increase the number of color bands on that amount multispectral camera applications, a multi-polarized image acquisition applications merit or can increase the variation in the polarization direction occur.

Further, at least one single-eye imaging optical system 20s is the effective diameter of the large lens of the most effective diameter of the single-eye imaging optical system 20s and a value FaiLmax, a maximum image height corresponding to the ommatidium image pickup optical system 20s as the value Yd satisfies the following conditional expression (2). Here, the maximum image height 2Yd are within the image circle ImC shown in FIGS. 2B and 2C, and the like.
0.68 <ΦLmax / 2Yd <1.70 ... (2)

Condition (2) is a conditional expression for appropriately setting the effective diameter of the single-eye imaging optical system 20s to the maximum image height of the single-eye imaging optical system 20s. By value ΦLmax / 2Yd of condition (2) is below the upper limit, number maximum effective diameter of the eye imaging optical system 20s not becomes too large, it is possible to reduce the non-use area nIm on the imaging plane I. On the other hand, when a value of the expression (2) exceeds the lower limit, the effective diameter of the single-eye imaging optical system 20s is not too small relative to the solid-state imaging device 50. Incidentally, in FIG. 2B, the effective diameter of the two-lens 122 is a lens having a large most effective diameter of the single-eye imaging optical system 20s, the sensor area is a portion to be used as an image in a range satisfying the formula (2) greater than the short side direction length of 51 but, as shown in FIG. 2D, it may circumscribe the sensor area 51. Also, it may be smaller than the sensor area 51 in the range satisfying the condition 2.

Further, ommatidium image pickup optical system 20s is to a distance value DAS on the optical axis AX to the imaging surface I from the intermediate stop 25 (aperture stop S), the focal length of the single-eye imaging optical system 20s whole system is f, to satisfy the following condition (3).
1.00 <DAS / f <3.00 ... (3)

Condition (3) is a conditional expression for properly setting the distance on the optical axis AX of the intermediate aperture 25 and the imaging surface I. By value DAS / f of the conditional expression (3) exceeds the lower limit, prevents the position of the intermediate diaphragm 25 is too close to the imaging surface I, it is possible to obtain a good principal ray incident angle characteristics. Therefore, it is possible to suppress the shading and the like at the periphery. On the other hand, when a value of the expression (3) is lower than the upper limit, it is possible to the position of the intermediate stop 25 is not too far away with respect to the imaging surface I, to reduce the overall length of the single-eye imaging optical system 20s as a result .

As described above, according to the compound-eye imaging optical system 200 described, it is assumed that the use of general-purpose solid-state imaging device 50 having a single imaging surface I, the use of solid-state imaging device 50 of a universal in, it can be captured area compared to using a solid-state imaging device specially designed divided for ommatidium image pickup optical system to obtain very low cost a compound-eye imaging optical system 200. Also, easy to correspond to the optical system of various specifications in one of the solid-state imaging device 50. Further, a plurality of single-eye imaging optical system, compared with the case of arranging a plurality of the solid-state imaging device two-dimensionally corresponding to ommatidium image pickup optical system, easy to take the synchronization of the time of imaging, a plurality of object images it is possible to suppress the time lag of the shooting. Incidentally, when the time lag in imaging the plurality of object images is generated, it can not be obtained an accurate distance measurement accuracy, there is a possibility that a problem occurs such can not be obtained an accurate multi-spectral information.

In the above description, the multi-lens imaging optical system 200 has a first lens array 21 composed of the second lens array 22, to add a lens array composed of substantially no power ommatidium lens it is also possible.

〔Example〕
The following describes specific examples of the compound-eye imaging optical system according to the present invention. Symbols used in each example are as follows.
f: ommatidium image pickup optical system focal length fB of: back focus F: F-number 2Y: ommatidium image pickup diagonal length of an image pickup region corresponding to the optical system ENTP: from the entrance pupil position (the first surface to the entrance pupil position distance)
EXTP: exit pupil position (Distance from the last surface to the exit pupil position)
H1: front principal point position (Distance from the first surface to front side principal point position)
H2: Rear side principal point position (Distance from the last surface to rear side principal point position)
R: curvature radius D: axial distance Nd: refractive index at the d-line of lens material [nu] d: the Abbe number each embodiment of the lens material, a surface that is described "*" is followed on each side numbers aspheric a surface having a non-spherical shape, the apex of the surface is the origin, the X axis in the optical axis AX direction, represents the height of the optical axis AX and vertically "number 1" below as h.

Figure JPOXMLDOC01-appb-M000001
However,
Ai: i-th order aspherical coefficient R: radius of curvature K: conical constant

Example 1
The overall specifications of the compound-eye imaging optical system 200 of Example 1 are shown below.
f = 2.28mm
fB = 2.98mm
F = 2.84
2Y = 2.453mm
ENTP = 0.74mm
EXTP = -4.87mm
H1 = 2.36mm
H2 = 0.7mm

It shows the data of the lens surfaces of Example 1 in Table 1 below. In Table 1 or less, such as, a surface number represents the "S (Surface No.)", represents the effective radius "ER (mm) (Effective radius)" infinity represents the "infinity", the aperture stop it represents the "STOP" the.
[Table 1]
S R (mm) D (mm) Nd νd ER (mm)
(Surface No.) (Effective radius)
1 * 3.582 0.549 1.58310 59.4 0.85
2 * 1.113 0.375 0.50
3 (STOP) infinity 0.136 0.43
4 * 13.952 2.000 1.58310 59.4 0.55
5 * -1.186 0.050 1.04
6 infinity 0.500 1.51630 64.1 1.08
7 infinity 1.10

The aspherical coefficients of the lens surfaces in Example 1 shown in Table 2 below. In the following it (including lens data in Tables), and represents an exponent of 10 (for example, 2.5 × 10 -02) with E (e.g., 2.5E-02).
[Table 2]
The first surface
K = 0.50971E + 01, A4 = 0.33109E + 00, A6 = -0.11308E + 01,
A8 = 0.62085E + 01, A10 = -0.20313E + 02, A12 = 0.37395E + 02,
A14 = -0.35734E + 02, A16 = 0.13787E + 02
The second surface
K = 0.31951E + 01, A4 = 0.40609E + 00, A6 = 0.14098E + 01,
A8 = -0.17577E + 02, A10 = 0.89269E + 02, A12 = -0.17467E + 03,
A14 = -0.18841E + 02, A16 = 0.13583E + 01
The fourth surface
K = 0.49998E + 02, A4 = 0.72939E-01, A6 = 0.13359E + 01,
A8 = -0.95070E + 01, A10 = 0.31063E + 02, A12 = 0.19642E + 02,
A14 = -0.25232E + 03, A16 = -0.34765E + 03, A18 = 0.31505E + 04,
A20 = -0.39197E + 04
The fifth surface
K = -0.87221E + 00, A4 = -0.15699E-02, A6 = -0.29701E-01,
A8 = 0.87492E-01, A10 = -0.62487E-01, A12 = -0.12745E + 00,
A14 = 0.29602E + 00, A16 = -0.20426E + 00, A18 = 0.38298E-01,
A20 = 0.74203E-02

The single lens data of Example 1 are shown in Table 3 below.
[Table 3]
Lens i focal length (mm)
1 1 -3.017
2 4 1.971

Figure 4A is a cross-sectional view of such ommatidium image pickup optical system 1A in Example 1. Ommatidium image pickup optical system 1A is composed, in order from the object side, a first single-eye lens having a meniscus shape with a convex surface facing the object side has a negative refractive power in the optical axis AX vicinity L1, the optical axis AX vicinity positive and a second two-lens L2 biconvex has a refractive power. These single-eye lenses L1, L2 is formed from a plastic material. And the one eye lens L1 between the first two eyes lens L2, the aperture stop S is disposed. Between the first two image-side surface S22 and the imaging surface of the eye lens L2 (image plane) I, parallel plate F having a predetermined thickness is disposed. Parallel flat plate F is obtained by an optical low-pass filter, IR cut filter, a seal glass of a solid-state imaging device (also in the following examples).

Figure 4B ~ 4D shows a spherical aberration, astigmatism, and distortion of the ommatidium image pickup optical system 1A in Example 1 shown in FIG. 4A. In the aberration diagrams of the subsequent, in the astigmatism graph, sagittal image plane solid and dotted represents a meridional image plane.

Example 2
The overall specifications of the compound-eye imaging optical system 200 of Example 2 are shown below.
f = 2.27mm
fB = 0.71mm
F = 2.84
2Y = 2.453mm
ENTP = 0.83mm
EXTP = -4.2mm
H1 = 2.05mm
H2 = -1.56mm

It shows the data of the lens surface of Example 2 in Table 4 below.
[Table 4]
S R (mm) D (mm) Nd νd ER (mm)
1 * 1.677 0.695 1.71200 31.1 0.84
2 * 3.340 0.216 0.56
3 (STOP) infinity 0.050 0.30
4 infinity 0.207 0.30
5 * -0.860 0.754 1.58310 59.4 0.38
6 * -11.972 0.217 0.76
7 * 0.790 0.874 1.58310 59.4 1.07
8 * 82.758 0.499 1.22
9 infinity 0.300 1.51630 64.1 1.26
10 infinity 1.28

The aspherical coefficients of the lens surfaces in Example 2 shown in Table 5 below.
[Table 5]
The first surface
K = -0.18560E + 02, A4 = 0.55558E + 00, A6 = -0.17048E + 01,
A8 = 0.65552E + 01, A10 = -0.19403E + 02, A12 = 0.35903E + 02,
A14 = -0.36402E + 02, A16 = 0.15172E + 02
The second surface
K = 0.29856E + 02, A4 = -0.16241E + 00, A6 = 0.60413E + 00,
A8 = -0.14856E + 02, A10 = 0.80391E + 02, A12 = -0.19217E + 03,
A14 = 0.73795E + 02, A16 = 0.22243E + 03
The fifth surface
K = -0.63224E + 01, A4 = -0.19287E + 01, A6 = 0.30407E + 01,
A8 = -0.18735E + 02, A10 = 0.14917E + 02, A12 = 0.14446E + 02
Sixth surface
K = 0.45012E + 01, A4 = -0.14746E + 01, A6 = 0.26450E + 01,
A8 = -0.46891E + 01, A10 = 0.48686E + 01, A12 = -0.25575E + 01
Seventh surface
K = -0.44139E + 01, A4 = -0.38396E-01, A6 = -0.20323E + 00,
A8 = 0.29030E + 00, A10 = -0.19911E + 00, A12 = 0.47654E-01
The eighth surface
K = 0.43219E + 04, A4 = 0.24329E + 00, A6 = -0.69576E + 00,
A8 = 0.79273E + 00, A10 = -0.52908E + 00, A12 = 0.18843E + 00,
A14 = -0.28264E-01

It shows the single lens data of Example 2 in Table 6 below.
[Table 6]
Single lens data Lens i focal length (mm)
1 1 4.032
2 5 -1.630
3 7 1.362

Figure 5A is a cross-sectional view of such ommatidium image pickup optical system 2A Example 2. Ommatidium image pickup optical system 2A includes, in order from the object side, a first single-eye lens having a meniscus shape with a convex surface facing the object side has a positive refractive power in the optical axis AX vicinity L1, negative in the optical axis AX vicinity and the two-lens L2 having a meniscus shape with a convex surface on a image side refractive power, and a three-lens with a convex surface on the object side has a positive refractive power in the optical axis AX vicinity L3 provided. These single-eye lenses L1, L2, L3 are formed of a plastic material. And the one eye lens L1 between the first two eyes lens L2, the aperture stop S is disposed. In Example 2, an aperture stop of two first and two eye lenses adjacent to S L1, L2 has a concentric shape with respect to the aperture stop S. Between the first three image-side surface S32 and the imaging surface of the eye lens L3 (image plane) I, parallel plate F having a predetermined thickness is disposed.

Figure 5B ~ 5D show the spherical aberration, astigmatism, and distortion of the ommatidium image pickup optical system 2A Example 2 shown in FIG. 5A.

Example 3
The overall specifications of the compound-eye imaging optical system 200 of Example 3 below.
f = 5.58mm
fB = 0.74mm
F = 2.88
2Y = 7.128mm
ENTP = 0.94mm
EXTP = -7.7mm
H1 = 2.83mm
H2 = -4.85mm

The data of the lens surfaces of the third embodiment shown in Table 7 below.
[Table 7]
S R (mm) D (mm) Nd νd ER (mm)
1 * 2.053 0.892 1.51760 63.5 1.30
2 * 6.125 0.174 0.95
3 (STOP) infinity 0.050 0.81
4 infinity 0.927 0.84
5 * -2.385 0.909 1.83920 23.9 1.11
6 * -10.026 0.100 1.96
7 * -11.460 2.233 1.66960 55.4 2.26
8 * -1.495 0.122 2.57
9 * 3.688 0.728 1.71430 38.9 3.20
10 * 1.486 1.958 3.51
11 infinity 0.100 1.51630 64.1 3.65
12 infinity 3.65

The aspherical coefficients of the lens surfaces in Example 3 shown in Table 8 below.
[Table 8]
The first surface
K = -0.36015E + 00, A4 = 0.12333E-01, A6 = 0.31218E-03,
A8 = 0.27749E-02, A10 = -0.10798E-02
The second surface
K = -0.33289E + 01, A4 = 0.48595E-02, A6 = -0.25004E-02,
A8 = -0.27194E-02
The fifth surface
K = 0.29245E + 01, A4 = -0.19532E-01, A6 = -0.29767E-02,
A8 = -0.25648E-02
Sixth surface
K = 0.18776E + 02, A4 = -0.62534E-02, A6 = 0.24242E-02,
A8 = -0.54450E-03, A10 = 0.47708E-04
Seventh surface
K = 0.85124E + 01, A4 = 0.20365E-02, A6 = 0.28694E-03,
A8 = -0.43668E-04, A10 = 0.20338E-05
The eighth surface
K = -0.35383E + 01, A4 = -0.33647E-01, A6 = 0.50091E-02,
A8 = -0.65241E-03, A10 = 0.19026E-04, A12 = 0.26143E-05
Ninth surface
K = -0.59510E + 00, A4 = -0.33443E-01, A6 = 0.48000E-02,
A8 = -0.49850E-03, A10 = 0.31087E-04, A12 = -0.93562E-06
Tenth surface
K = -0.51899E + 01, A4 = -0.17421E-01, A6 = 0.20240E-02,
A8 = -0.18057E-03, A10 = 0.93807E-05, A12 = -0.24248E-06

It shows the single lens data of Example 3 in Table 9 below.
[Table 9]
Lens i focal length (mm)
1 1 5.550
2 5 -3.944
3 7 2.355
4 9 -4.040

6A is a cross-sectional view of such ommatidium image pickup optical system 3A Example 3. Ommatidium image pickup optical system 3A includes, in order from the object side, a first single-eye lens having a meniscus shape with a convex surface facing the object side has a positive refractive power in the optical axis AX vicinity L1, negative in the optical axis AX vicinity the two with the eye lens L2, a three-lens having a meniscus shape with a convex surface facing the optical axis the image side has a positive refractive power in AX vicinity of meniscus shape with a convex surface facing the image side has a refractive power It includes a L3, and a second four-lens L4 having a meniscus shape with a convex surface facing the object side has a negative refractive power in the optical axis AX vicinity. These single-eye lenses L1, L2, L3, L4 are formed of a plastic material. And the one eye lens L1 between the first two eyes lens L2, the aperture stop S is disposed. In Example 3, an aperture stop of two first and two eye lenses adjacent to S L1, L2 has a concentric shape with respect to the aperture stop S. Between the first four image side surface S42 and the imaging surface of the eye lens L4 (image plane) I, parallel plate F having a predetermined thickness is disposed.

Figure 6B ~ 6D show the spherical aberration, astigmatism, and distortion of the ommatidium image pickup optical system 3A Example 3 shown in FIG. 6A.

Example 4
The overall specifications of the compound-eye imaging optical system 200 of the fourth embodiment are shown below.
f = 2.27mm
fB = 0.55mm
F = 2.80
2Y = 2.453mm
ENTP = 3.2mm
EXTP = 8.47mm
H1 = 6.11mm
H2 = -1.72mm

The data of the lens surfaces of the fourth embodiment shown in Table 10 below.
[Table 10]
S R (mm) D (mm) Nd νd ER (mm)
1 * 1.077 1.071 1.58310 59.4 1.23
2 * 0.569 0.999 0.67
3 (STOP) infinity 0.108 0.30
4 * 2.047 3.000 1.58310 59.4 0.37
5 * -0.960 0.500 1.15
6 infinity 0.300 1.51630 64.1 1.50
7 infinity 1.50

The aspherical coefficients of the lens surfaces in Example 4 shown in Table 11 below.
[Table 11]
The first surface
K = -0.79175E + 00, A4 = 0.25051E-01, A6 = 0.45312E-01,
A8 = -0.50358E-01, A10 = 0.44294E-01, A12 = -0.16317E-01
The second surface
K = -0.60465E + 00, A4 = -0.40339E-01, A6 = 0.99058E-01,
A8 = 0.10162E + 00, A10 = -0.23472E + 01, A12 = 0.72086E + 00
The fourth surface
K = -0.62656E + 01, A4 = 0.13553E-01, A6 = 0.27201E + 00,
A8 = -0.49665E + 01, A10 = 0.51254E + 02, A12 = -0.16776E + 03
The fifth surface
K = -0.66381E + 00, A4 = 0.14331E + 00, A6 = -0.27488E-01,
A8 = 0.22075E-01, A10 = -0.64318E-02, A12 = 0.21115E-02

It shows the single lens data of Example 4 in Table 12 below.
[Table 12]
Single lens data Lens i focal length (mm)
1 1 -9.322
2 4 1.772

Figure 7A is a cross-sectional view of such embodiment 4 ommatidium image pickup optical system 4A. Ommatidium image pickup optical system 4A is composed, in order from the object side, a first single-eye lens having a meniscus shape with a convex surface facing the object side has a negative refractive power in the optical axis AX vicinity L1, the optical axis AX vicinity positive and a second two-lens L2 biconvex has a refractive power. These single-eye lenses L1, L2 are formed of a plastic material. And the one eye lens L1 between the first two eyes lens L2, the aperture stop S is disposed. Between the first two image-side surface S22 and the imaging surface of the eye lens L2 (image plane) I, parallel plate F having a predetermined thickness is disposed.

Figure 7B ~ 7D illustrate spherical aberration, astigmatism, and distortion of the single-eye imaging optical system 4A of the fourth embodiment shown in Figure 7A.

[Example 5]
The overall specifications of the compound-eye imaging optical system 200 of Example 5 are shown below.
f = 2.6mm
fB = 2.14mm
F = 2.84
2Y = 2.452mm
ENTP = 4.66mm
EXTP = -2.95mm
H1 = 5.93mm
H2 = -0.45mm

The data of the lens surfaces of the fifth embodiment shown in Table 13 below.
[Table 13]
S R (mm) D (mm) Nd νd ER (mm)
1 * 2.463 2.621 1.63470 23.9 2.03
2 * 0.692 0.973 0.65
3 (STOP) infinity 0.058 0.40
4 * 1.489 1.950 1.54470 56.0 0.49
5 * -1.303 0.85

The aspherical coefficients of the lens surfaces of the fifth embodiment shown in Table 14 below.
[Table 14]
The first surface
K = -0.43915E + 00, A4 = 0.37865E-02, A6 = -0.13518E-02,
A8 = 0.13285E-02, A10 = -0.54808E-03, A12 = 0.11243E-03,
A14 = -0.97947E-05, A16 = 0.17829E-06, A18 = 0.00000E + 00,
A20 = 0.00000E + 00
The second surface
K = -0.42769E + 00, A4 = 0.82292E-01, A6 = -0.22170E + 00,
A8 = 0.58062E + 00, A10 = -0.72995E + 00, A12 = -0.40404E-03,
A14 = -0.41471E-05, A16 = 0.25990E-06, A18 = 0.00000E + 00,
A20 = 0.00000E + 00
The fourth surface
K = -0.29559E + 01, A4 = 0.62306E-01, A6 = 0.31788E + 00,
A8 = -0.17663E + 01, A10 = -0.68792E-01, A12 = 0.19990E + 02,
A14 = 0.65481E + 02, A16 = -0.28468E + 03, A18 = -0.13498E + 04,
A20 = 0.40888E + 04
The fifth surface
K = -0.14437E + 01, A4 = 0.32916E-01, A6 = 0.16412E-01,
A8 = 0.58035E-01, A10 = -0.18593E-01, A12 = -0.20422E-02,
A14 = -0.14165E-01, A16 = 0.33905E-01, A18 = 0.51144E-01,
A20 = -0.61625E-01

It shows the single lens data of Example 5 in Table 15 below.
[Table 15]
Single lens data Lens i focal length (mm)
1 1 -3.561
2 4 1.693

Figure 8A is a cross-sectional view of such ommatidium image pickup optical system 5A in Example 5. Ommatidium image pickup optical system 5A is composed, in order from the object side, a first single-eye lens having a meniscus shape with a convex surface facing the object side has a negative refractive power in the optical axis AX vicinity L1, the optical axis AX vicinity positive and a second two-lens L2 biconvex has a refractive power. These single-eye lenses L1, L2 are formed of a plastic material. And the one eye lens L1 between the first two eyes lens L2, the aperture stop S is disposed.

Figure 8B ~ 8D show the spherical aberration, astigmatism, and distortion of the single-eye imaging optical system 5A of Example 5 shown in FIG. 8A.

The following Table 16 for reference, summarizes the characteristics of each of Examples 1-5.
[Table 16]

Figure JPOXMLDOC01-appb-I000002

Having described the present invention with reference to embodiments and examples, the present invention is not limited to the above embodiment and the like. For example, sequences ommatidium image pickup optical system 20s is not limited to 4 × 4, it may be a 3 × 3, 5 × 5 or more. Further, not limited to arranging the ommatidium image pickup optical system 20s rectangular grid points, can be a variety of arrangement patterns.

In the above embodiment, the conditional expression (2) need not be satisfied with all of the single-eye imaging optical system 20s, may be one part of the ommatidium image pickup optical system 20s is satisfied. For example, as part of the single-eye imaging optical system 20s satisfy the range of the conditional expression (2), as shown in FIG. 9, a relatively large ommatidium effective diameter outside the range of the conditional expression (2) it may be arranged in a nested between the imaging optical system 20s.

In the above embodiments, is replaced in addition to the plurality of basic ommatidium image pickup optical system 20s which satisfies the conditional expression (1) or a part, it is also possible to add different ommatidium optical system having function.

Claims (6)

  1. A compound-eye imaging optical system for forming a plurality of object images on a single imaging surface,
    It has individual imaging optical systems, each corresponding to the plurality of object images,
    Wherein each of the imaging optical system, multi-eye image pickup optical system satisfies the following conditional expression.
    -0.20 <Yd / EXPD <0.50 ... (1)
    However,
    Yd: maximum image height EXPD corresponding to the respective imaging optical system is a distance on the optical axis from the exit pupil position of the respective imaging optical system to said imaging surface
  2. Wherein each imaging optical system has two or more lenses,
    At least one of the individual imaging optical system satisfies the following conditional expression, multi-lens imaging optical system according to claim 1.
    0.68 <ΦLmax / 2Yd <1.70 ... (2)
    However,
    FaiLmax: The most effective of the large lens diameter effective diameter Yd: maximum image height corresponding to the respective imaging optical system
  3. Wherein each imaging optical system has an aperture stop, satisfy the following conditional expression, multi-lens imaging optical system according to any one of claims 1 and 2.
    1.00 <DAS / f <3.00 ... (3)
    However,
    DAS: the distance on the optical axis from the aperture stop to the image pickup plane f: focal length of the individual imaging optical system as a whole
  4. It is integrally formed at least two or more array lens are stacked in the optical axis direction the individual imaging optical system forms, according to any one of claims 1 to 3 compound-eye imaging optical system.
  5. The aperture stop is arranged between the lenses,
    The aperture stop two lenses adjacent to each other, both having concentric lens shape with respect to the aperture stop, multi-lens imaging optical system according to claim 3.
  6. A compound-eye imaging optical system according to any one of claims 1 to 5,
    A single imaging element,
    Compound-eye imaging apparatus comprising: a.
PCT/JP2015/064664 2014-05-26 2015-05-21 Multi-eye imaging optical system and multi-eye imaging device WO2015182488A1 (en)

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05341185A (en) * 1992-05-25 1993-12-24 Olympus Optical Co Ltd Objective optical system for endoscope
JPH07318799A (en) * 1994-05-27 1995-12-08 Olympus Optical Co Ltd Endoscope objective optical system
JP2000162498A (en) * 1998-11-25 2000-06-16 Matsushita Electric Works Ltd Wide angle lens
JP2000171700A (en) * 1998-12-02 2000-06-23 Konica Corp Wide-angle lens
JP2001174701A (en) * 1999-12-15 2001-06-29 Nikon Corp Wide angle photographic lens system
JP2002303792A (en) * 2001-04-03 2002-10-18 Optech:Kk Zoom lens and image pickup unit using the zoom lens
JP2003255225A (en) * 2002-03-04 2003-09-10 Nidec Copal Corp Zoom lens
JP2011523538A (en) * 2008-05-20 2011-08-11 ペリカン イメージング コーポレイション Imaging and processing of images using a monolithic camera array with different types of imaging devices
WO2012165281A1 (en) * 2011-06-01 2012-12-06 コニカミノルタアドバンストレイヤー株式会社 Compound-eye unit
JP2013057738A (en) * 2011-09-07 2013-03-28 Olympus Corp Imaging apparatus
JP2014010400A (en) * 2012-07-02 2014-01-20 Canon Inc Imaging device and lens device

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05341185A (en) * 1992-05-25 1993-12-24 Olympus Optical Co Ltd Objective optical system for endoscope
JPH07318799A (en) * 1994-05-27 1995-12-08 Olympus Optical Co Ltd Endoscope objective optical system
JP2000162498A (en) * 1998-11-25 2000-06-16 Matsushita Electric Works Ltd Wide angle lens
JP2000171700A (en) * 1998-12-02 2000-06-23 Konica Corp Wide-angle lens
JP2001174701A (en) * 1999-12-15 2001-06-29 Nikon Corp Wide angle photographic lens system
JP2002303792A (en) * 2001-04-03 2002-10-18 Optech:Kk Zoom lens and image pickup unit using the zoom lens
JP2003255225A (en) * 2002-03-04 2003-09-10 Nidec Copal Corp Zoom lens
JP2011523538A (en) * 2008-05-20 2011-08-11 ペリカン イメージング コーポレイション Imaging and processing of images using a monolithic camera array with different types of imaging devices
WO2012165281A1 (en) * 2011-06-01 2012-12-06 コニカミノルタアドバンストレイヤー株式会社 Compound-eye unit
JP2013057738A (en) * 2011-09-07 2013-03-28 Olympus Corp Imaging apparatus
JP2014010400A (en) * 2012-07-02 2014-01-20 Canon Inc Imaging device and lens device

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