Optical system and imaging device

Abstract

The invention relates to an optical system and an imaging apparatus. An optical system according to the present disclosure includes, in order from an object side to an image surface side: a first lens group having a positive refractive power as a whole group and fixed to an image surface as a whole during focusing; a second lens group that has a positive or negative refractive power as a whole group, and that performs focusing from infinity to a close distance by moving the whole group in the optical axis direction; and a third lens group which is divided into a group 3a, a group 3b, and a group 3c in order from the object side to the image plane side, the group 3b being moved in a direction substantially perpendicular to the optical axis to correct image shake, the group 3b having negative or positive refractive power as a whole, and the whole group being fixed with respect to the image plane during focusing.

Description

[0001] This application is a divisional application of the invention patent application with application number 202080039144.1 (PCT / JP2020 / 021618), application date June 1, 2020 (national phase entry date November 26, 2021), and invention name “Optical system and camera device”. Technical Field

[0002] The present disclosure relates to an optical system suitable for an interchangeable lens that can be mounted on, for example, a digital still camera or a digital mirrorless camera, and an imaging device including such an optical system. Background Art

[0003] In recent years, the number of pixels of the image pickup element used in the lens-interchangeable digital camera system has been increasing, and the optical system is also required to have a correspondingly high rendering performance. In addition, among the lens-interchangeable mirrorless cameras that have become popular in recent years, the mainstream is a small and light camera body, and the optical system is also required to be small and light, and such an optical system has been developed (see Patent Document 1).

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2017-215492 Summary of the invention

[0007] On the other hand, a telephoto lens corresponding to a large imaging element such as a full-size sensor generally becomes larger in size, so as an optical system, a weight balance suitable for a small and light camera body and with a center of gravity close to the camera body is required in terms of swingability.

[0008] It is desirable to provide an optical system which is lightweight, has excellent swingability, and has high optical performance of the entire screen, and an imaging device equipped with such an optical system.

[0009] An optical system of one embodiment of the present disclosure includes, in order from the object side to the image plane side: a first lens group, which has a positive refractive power as a group as a whole and is fixed relative to the image plane during focusing; a second lens group, which has a positive or negative refractive power as a group as a whole and moves in the optical axis direction as a whole to perform focusing from infinity to a close distance; and a third lens group, which is divided into a 3a group, a 3b group and a 3c group in order from the object side to the image plane side, the 3b group moves in a direction substantially perpendicular to the optical axis to perform image shake correction, has a negative or positive refractive power as a group as a whole and is fixed relative to the image plane during focusing, and the optical system satisfies the following conditional equations (1) to (3), and the 3c group includes at least one negative lens satisfying the following conditional equation (6).

[0010] L / f<1……(1)

[0011] D_g1max / f>0.23……(2)

[0012] D_3bImg / f<0.24……(3)

[0013] θgF_3cn-(-0.001801*νd_3cn+0.648262)>0.008……(6)

[0014] in,

[0015] L: The distance from the surface of the first lens group closest to the object to the image plane.

[0016] f: The focal distance of the entire system when infinity is in focus.

[0017] D_g1max: The maximum air gap on the optical axis within the first lens group.

[0018] D_3bImg: The distance from the surface closest to the object side of the 3b group to the image plane,

[0019] θgF_3cn: the partial dispersion ratio of the g-line to the F-line of the negative lens in the 3c group,

[0020] νd_3cn: Abbe value of the negative lens in the 3c group relative to the d-line.

[0021] An imaging device according to an embodiment of the present disclosure includes: an optical system; and an imaging element that outputs an imaging signal corresponding to an optical image formed by the optical system, wherein the optical system according to the embodiment of the present disclosure is configured as the optical system.

[0022] In the optical system or the imaging device according to one embodiment of the present disclosure, three lens groups are included as a whole, and the structure of each lens group is optimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a lens cross-sectional view showing a first configuration example (Example 1) of an optical system according to an embodiment of the present disclosure.

[0024] Figure 2 This is to show that specific values ​​are applied to Figure 1 The aberration diagrams of longitudinal aberrations when the optical system of Example 1 of the optical system shown is in infinity focus.

[0025] Figure 3 This is to show that specific values ​​are applied to Figure 1The aberration diagrams of lateral aberrations in the optical system of Example 1 of the optical system shown are when the focus is achieved at infinity and when no image stabilization is performed.

[0026] Figure 4 This is to show that specific values ​​are applied to Figure 1 The aberration diagrams of lateral aberrations when the optical system is in focus at infinity and when image stabilization is performed in the optical system of Example 1 shown.

[0027] Figure 5 This is a lens cross-sectional view showing a second structural example (Example 2) of an optical system according to an embodiment.

[0028] Figure 6 This is to show that specific values ​​are applied to Figure 5 The aberration diagram of the longitudinal aberration when the optical system of Example 2 of the optical system shown is in infinity focus.

[0029] Figure 7 This is to show that specific values ​​are applied to Figure 5 The aberration diagrams of lateral aberrations in the optical system of Example 2 of the optical system shown are when the focus is achieved at infinity and when no image stabilization is performed.

[0030] Figure 8 This is to show that specific values ​​are applied to Figure 5 The aberration diagrams of lateral aberrations when the optical system is in focus at infinity and when image stabilization is performed in the optical system of Example 2 shown.

[0031] Fig. 9 This is a lens cross-sectional view showing a third structural example (Example 3) of an optical system according to an embodiment.

[0032] Fig.10 This is to show that specific values ​​are applied to Fig. 9 The aberration diagram of the longitudinal aberration when the optical system of Example 3 of the optical system shown is in infinity focus.

[0033] Fig.11 This is to show that specific values ​​are applied to Fig. 9 The aberration diagrams of lateral aberrations in the optical system of Example 3 of the optical system shown are when the focus is achieved at infinity and when no image stabilization is performed.

[0034] Fig.12 This is to show that specific values ​​are applied to Fig. 9 The aberration diagrams of lateral aberrations when the optical system is in focus at infinity and when image stabilization is performed in the optical system of Example 3 shown.

[0035] Fig.13 This is a lens cross-sectional view showing a fourth structural example (Example 4) of an optical system according to an embodiment.

[0036] Fig.14 This is to show that specific values ​​are applied to Fig.13 The aberration diagram of the longitudinal aberration when the optical system of Example 4 of the optical system shown is in infinity focus.

[0037] Fig.15 This is to show that specific values ​​are applied to Fig.13 The aberration diagrams of lateral aberrations in the optical system of Example 4 of the optical system shown are when the focus is achieved at infinity and when no image stabilization is performed.

[0038] Fig.16 This is to show that specific values ​​are applied to Fig.13 The aberration diagrams of lateral aberrations when the optical system is in focus at infinity and when image stabilization is performed in the optical system of Example 4 shown.

[0039] Fig.17 This is a lens cross-sectional view showing a fifth structural example (Example 5) of an optical system according to an embodiment.

[0040] Fig.18 This is to show that specific values ​​are applied to Fig.17 The aberration diagram of the longitudinal aberration when the optical system of Example 5 of the optical system shown is in infinity focus.

[0041] Fig.19 This is to show that specific values ​​are applied to Fig.17 The aberration diagrams of lateral aberrations in the optical system of Example 5 of the optical system shown are when the focus is achieved at infinity and when no image stabilization is performed.

[0042] Fig. 20 This is to show that specific values ​​are applied to Fig.17 The aberration diagrams of lateral aberrations when the optical system is in focus at infinity and when image stabilization is performed in the optical system of Example 5 shown.

[0043] Fig.21 This is a lens cross-sectional view showing a sixth structural example (Example 6) of an optical system according to an embodiment.

[0044] Fig. 22 This is to show that specific values ​​are applied to Fig.21 The aberration diagram of the longitudinal aberration when the optical system of Example 6 of the optical system shown is in infinity focus.

[0045] Fig.23 This is to show that specific values ​​are applied to Fig.21 The aberration diagrams of lateral aberrations in the optical system of Example 6 of the optical system shown are when the focus is achieved at infinity and when no image stabilization is performed.

[0046] Fig.24 This is to show that specific values ​​are applied to Fig.21The aberration diagrams of lateral aberrations when the optical system is in focus at infinity and when image stabilization is performed in the optical system of Example 6 shown.

[0047] Fig.25 This is a lens cross-sectional view showing a seventh structural example (Example 7) of an optical system according to an embodiment.

[0048] Fig.26 This is to show that specific values ​​are applied to Fig.25 The aberration diagram of the longitudinal aberration when the optical system of Example 7 of the optical system shown is in infinity focus.

[0049] Fig. 27 This is to show that specific values ​​are applied to Fig.25 The aberration diagrams of lateral aberrations in the optical system of Example 7 of the optical system shown are when the focus is achieved at infinity and when no image stabilization is performed.

[0050] Fig.28 This is to show that specific values ​​are applied to Fig.25 The aberration diagrams of lateral aberrations when the optical system of Example 7 of the optical system shown is in focus at infinity and when image stabilization is performed.

[0051] Fig.29 This is a lens cross-sectional view showing an eighth structural example (Example 8) of an optical system according to an embodiment.

[0052] Fig.30 This is to show that specific values ​​are applied to Fig.29 The aberration diagram of the longitudinal aberration when the optical system of Example 8 of the optical system shown is in infinity focus.

[0053] Fig.31 This is to show that specific values ​​are applied to Fig.29 The aberration diagrams of lateral aberrations in the optical system of Example 8 of the optical system shown are when the focus is achieved at infinity and when no image stabilization is performed.

[0054] Fig.32 This is to show that specific values ​​are applied to Fig.29 The aberration diagrams of lateral aberrations when focusing at infinity and image stabilization are performed in the optical system of Example 8 of the optical system shown.

[0055] Fig.33 This is a lens cross-sectional view showing a ninth structural example (Example 9) of an optical system according to an embodiment.

[0056] Fig.34 This is to show that specific values ​​are applied to Fig.33 The aberration diagram of the longitudinal aberration when the optical system of Example 9 of the optical system shown is in infinity focus.

[0057] Fig.35 This is to show that specific values ​​are applied to Fig.33 The aberration diagrams of lateral aberrations in the optical system of Example 9 of the optical system shown are when the focus is achieved at infinity and when no image stabilization is performed.

[0058] Fig.36 This is to show that specific values ​​are applied to Fig.33 The aberration diagrams of lateral aberrations when focusing at infinity and image stabilization are performed in the optical system of Example 9 of the optical system shown.

[0059] Fig.37 This is a lens cross-sectional view showing a tenth structural example (Example 10) of an optical system according to an embodiment.

[0060] Fig.38 This is to show that specific values ​​are applied to Fig.37 The aberration diagram of the longitudinal aberration when the optical system of Example 10 of the optical system shown is in infinity focus.

[0061] Fig.39 This is to show that specific values ​​are applied to Fig.37 The aberration diagrams of lateral aberrations in the optical system of Example 10 when the optical system is in focus at infinity and when no image stabilization is performed are shown.

[0062] Fig.40 This is to show that specific values ​​are applied to Fig.37 The aberration diagrams of lateral aberrations when focusing at infinity and image stabilization are performed in the optical system of Example 10 shown in the optical system.

[0063] Fig.41 This is a lens cross-sectional view showing an eleventh structural example (Example 11) of an optical system according to an embodiment.

[0064] Fig.42 This is to show that specific values ​​are applied to Fig.41 An aberration diagram of longitudinal aberration when focusing at infinity in the optical system of Example 11 of the optical system shown.

[0065] Fig.43 This is to show that specific values ​​are applied to Fig.41 The aberration diagrams of lateral aberrations when the optical system is in focus at infinity and when no image stabilization is performed in the optical system of Example 11 shown.

[0066] Fig.44 This is to show that specific values ​​are applied to Fig.41 The aberration diagrams of lateral aberrations when focusing at infinity and image stabilization are performed in the optical system of Example 11 shown.

[0067] Fig.45 This is a block diagram showing a configuration example of an imaging device.

[0068] Fig.46 This is a block diagram showing an example of a schematic configuration of a vehicle control system.

[0069] Fig.47 It is an explanatory diagram showing an example of the installation positions of the vehicle exterior information detection unit and the imaging unit.

[0070] Fig.48 This is a structural diagram showing an example of a schematic structure of an endoscopic surgery system.

[0071] Fig.49 It is shown Fig.48 A block diagram showing an example of the functional structure of a camera head and a CCU. DETAILED DESCRIPTION

[0072] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0073] 0. Comparative Example

[0074] 1. Basic structure of lens

[0075] 2. Function and effect

[0076] 3. Application example to imaging devices

[0077] 4. Numerical Examples of Lenses

[0078] 5. Application examples

[0079] 6. Other Implementation Methods

[0080] <0. Comparative Example>

[0081] In the lens-interchangeable mirrorless cameras that have become popular in recent years, the mainstream is a small and light camera body. On the other hand, telephoto lenses corresponding to large imaging elements such as full-size sensors are generally large in size, so as an optical system, there is a strong demand for a weight balance that is suitable for a small and light body and the center of gravity is close to the camera body, and for the optical system itself to be lightweight.

[0082] In Patent Document 1 (Japanese Patent Publication No. 2017-215492), an optical system is proposed, which includes a first lens group with positive refractive power, a second lens group with positive or negative refractive power, and a third lens group with positive or negative refractive power, from the object side to the image side, and the second lens group moves during focusing, and the interval between adjacent lens groups changes. The optical system in Patent Document 1 includes a first lens group, which includes a positive lens G1p arranged closest to the object side, a positive lens G2p arranged closer to the image side than the positive lens G1p, and a negative positive lens G3p arranged closer to the image side than the positive lens G2p. In the optical system of Patent Document 1, when the focal length of the optical system is set to f, the distance on the optical axis from the lens surface closest to the object side of the first lens group to the image plane is set to LD, the distance on the optical axis between the positive lens G1p and the lens arranged adjacent to the image plane side of the positive lens G1p is set to D12, the Abbe number of the material of the positive lens G2p is set to νdG2p, and the Abbe number of the material of the positive lens G3p is set to νdG3p, the following conditional expression is satisfied.

[0083] LD / f<1.0

[0084] 0.20≤D12 / LD<0.500

[0085] νdG2p>73.0

[0086] νdG3p>73.0

[0087] In the optical system of Patent Document 1, a large air gap is provided in the first lens group to achieve a light-weight lens barrel. However, in the description of Patent Document 1, any lens block in the optical system can be set as an anti-shake group, but in fact, the lens blocks that satisfy the appropriate anti-shake sensitivity (the ratio of the image movement to the movement of the anti-shake group in the direction perpendicular to the optical axis) and the good optical performance when the anti-shake group is offset are extremely limited. In order to establish the minimum anti-shake function as an optical system, any lens block cannot be set as an anti-shake group. Moreover, in Patent Document 1, in the embodiments, the positions of the lens blocks that can actually play the role of the anti-shake group are all far away from the image plane, and the center of gravity of the lens barrel is far away from the camera body, so the realization of comfortable swingability of the lens barrel becomes insufficient.

[0088] Therefore, it is desirable to provide a telephoto lens having an anti-shake function capable of coping with a large imaging element, which is lightweight, has a center of gravity close to the image plane, has excellent swing resistance, suppresses chromatic aberration of the entire image, has high optical performance, and is an optimal optical system for mirrorless camera systems.

[0089] The optical system according to one embodiment of the present disclosure described below is suitable for a telephoto lens used in such a mirrorless digital camera or the like.

[0090] <1. Basic structure of lens>

[0091] Figure 1 A first configuration example of an optical system according to an embodiment of the present disclosure is shown, and corresponds to the configuration of Example 1 described later. Figure 5 A second configuration example of an optical system according to an embodiment is shown, which corresponds to the configuration of Example 2 described later. Fig. 9 A third structural example of an optical system according to an embodiment is shown, which corresponds to the structure of Example 3 described later. Fig.13 A fourth structural example of an optical system according to an embodiment is shown, which corresponds to the structure of Example 4 described later. Fig.17 A fifth structural example of an optical system according to an embodiment is shown, which corresponds to the structure of Example 5 described later. Fig.21 A sixth structural example of an optical system according to an embodiment is shown, which corresponds to the structure of Example 6 described later. Fig.25 A seventh structural example of an optical system according to an embodiment is shown, which is equivalent to the structure of Example 7 described later. Fig.29 An eighth structural example of an optical system according to an embodiment is shown, which is equivalent to the structure of Example 8 described later. Fig.33 A ninth structural example of an optical system according to an embodiment is shown, which is equivalent to the structure of Example 9 described later. Fig.37 A tenth structural example of an optical system according to an embodiment is shown, which corresponds to the structure of Example 10 described later. Fig.41 An eleventh structural example of an optical system according to an embodiment is shown, which corresponds to the structure of Example 11 described later.

[0092] exist Figure 1 In the above, Z1 represents the optical axis. An optical member such as a cover glass for protecting the imaging element may be arranged between the optical systems 1 to 11 of the first to sixth structural examples and the image plane Simg. In addition, various optical filters such as a low-pass filter and an infrared cutoff filter may be arranged in addition to the cover glass.

[0093] Hereinafter, the structure of the optical system of one embodiment of the present disclosure will be appropriately compared with Figure 1 Although the optical systems 1 to 11 of the respective configuration examples shown in the drawings are described in correspondence, the technology disclosed herein is not limited to the configuration examples shown in the drawings.

[0094] The optical system according to one embodiment includes, in order from the object side to the image plane side, a first lens group GR1 , a second lens group GR2 , and a third lens group GR3 .

[0095] The first lens group GR1 has a positive refractive power as a whole group, and the whole group is fixed with respect to the image plane Simg during focusing.

[0096] The second lens group GR2 has positive or negative refractive power as a whole group, and the whole group moves in the optical axis direction to perform focusing from infinity to a short distance. Figure 1 Each structural example shows the lens configuration when focusing at infinity. In the first structural example (Example 1) to the sixth structural example (Example 6), the second lens group GR2 has a positive refractive power as a group as a whole, and when focusing from infinity to a short distance, the second lens group GR2 moves to the object side. In the seventh structural example (Example 7) to the eleventh structural example (Example 11), the second lens group GR2 has a negative refractive power as a group as a whole, and when focusing from infinity to a short distance, the second lens group GR2 moves to the image side.

[0097] The third lens group GR3 has negative or positive refractive power as a group as a whole, and the group as a whole is fixed relative to the image plane Simg during focusing. In addition, the third lens group GR3 is divided into 3a group GR3a, 3b group GR3b and 3c group GR3c in sequence from the object side to the image plane side. The 3b group GR3b is an anti-shake group, which moves in a direction substantially perpendicular to the optical axis Z1 to perform image shake correction. In the first structural example (Example 1) to the tenth structural example (Example 10), the third lens group GR3 has negative refractive power as a group as a whole. In the eleventh structural example (Example 11), the third lens group GR3 has positive refractive power as a group as a whole.

[0098] The aperture stop St is preferably arranged between the 3a group GR3a and the 3b group GR3b.

[0099] Furthermore, an optical system according to one embodiment satisfies the following conditional expressions (1) to (3).

[0100] L / f<1……(1)

[0101] D_g1max / f>0.23……(2)

[0102] D_3bImg / f<0.24……(3)

[0103] in,

[0104] L: The distance from the surface of the first lens group GR1 closest to the object to the image plane Simg

[0105] f: The focal distance of the entire system when infinity is in focus

[0106] D_g1max: Maximum air gap on the optical axis within the first lens group GR1

[0107] D_3bImg: The distance from the surface of the 3b group GR3b closest to the object to the image plane Simg.

[0108] In addition, the optical system of one embodiment preferably satisfies a predetermined conditional expression and the like described later.

[0109] <2. Function and Effect>

[0110] Next, the operation and effects of the optical system according to one embodiment of the present disclosure will be described. Furthermore, a preferred configuration of the optical system according to one embodiment of the present disclosure will be described.

[0111] In addition, the effects described in this specification are merely illustrative and not limiting, and other effects may also be present.

[0112] According to an embodiment, the optical system includes three lens groups as a whole, and the structure of each lens group is optimized, so it is possible to achieve high optical performance such as light weight, excellent swingability with the center of gravity close to the image plane side, and suppressed chromatic aberration of the entire image.

[0113] In an optical system of one embodiment, a large air space is provided in the first lens group GR1 to achieve lightweight. In addition, in an optical system of one embodiment, the anti-shake group (3b group GR3b) is arranged at the rear, so that the actuator driving the lens can be arranged close to the image plane, and the center of gravity is near the image plane, thereby achieving an optical system with excellent swingability.

[0114] Satisfying the above conditional expression (1) generally indicates that the optical system is a telephoto system. In an optical system satisfying conditional expression (1) represented by a telephoto lens, the third lens group GR3 fixed to the image plane Simg is divided into three groups, namely, the 3a group GR3a, the 3b group GR3b and the 3c group GR3c. The 3b group GR3b sandwiched in the center is set as an anti-shake group, and the 3b group GR3b is arranged at a position satisfying conditional expression (3) with respect to the image plane Simg. The 3b group GR3b as the anti-shake group is sandwiched by the front and rear 3a group GR3a and the 3c group GR3c that compensate for aberration correction during anti-shake, and the anti-shake group is arranged at a rear position with respect to the image plane Simg in a manner satisfying conditional expression (3). As a result, the anti-shake group passage height of light from the axis related to aberration degradation during anti-shake to the peripheral image height becomes low, and good rendering performance can be obtained even during anti-shake. In addition, the light passing height is reduced, so the diameter of the anti-shake group can be suppressed, and the actuator unit driving the anti-shake group can be easily made small and light. Furthermore, the anti-shake group is arranged at the rear, and the actuator driving the anti-shake group is arranged at the rear, so the center of gravity can be brought close to the image plane, and an optical system with very good swingability can be obtained.

[0115] In addition, by satisfying conditional expression (2) simultaneously with conditional expressions (1) and (3), the weight of the optical elements on the front side of the lens barrel, which account for most of the weight of the lens barrel, can be reduced in the telephoto lens. However, if a large air gap is set in the first lens group GR1 simply by satisfying conditional expression (2), the chromatic aberration generated in the optical system on the object side will increase in proportion to the distance in the process of propagation in the air gap compared to the maximum air gap, and it is difficult to achieve high rendering performance as the optical system as a whole. However, by satisfying the above-mentioned conditional expression (3) at the same time, the 3c group GR3c is close to the rear of the optical system, that is, the image plane Simg, and is arranged at a position with a high height of peripheral light rays, and has a high aberration correction ability, so it can play the role of offsetting the aberration generated in the first lens group GR1, which is roughly in a symmetrical position in the optical system, and even when a large air gap is set in the first lens group GR1, high rendering performance can be achieved.

[0116] In order to achieve the effects of the above-mentioned conditional expressions (2) and (3) more effectively, it is preferable to set the numerical ranges of the conditional expressions (2) and (3) to the following conditional expressions (2)' and (3)'.

[0117] D_g1max / f>0.24……(2)'

[0118] D_3bImg / f<0.23……(3)'

[0119] Furthermore, it is preferable that the numerical ranges of the conditional expressions (2) and (3) be set as in the following conditional expressions (2)” and (3)”.

[0120] D_g1max / f>0.25……(2)”

[0121] D_3bImg / f<0.22……(3)”

[0122] In the optical system of one embodiment, it is preferable that the first lens group GR1 includes at least one positive lens satisfying the following conditional expressions (4) and (5).

[0123] νd_1p>90……(4)

[0124] θgF_1p-(-0.001801*νd_1p+0.648262)>0.04……(5)

[0125] in,

[0126] νd_1p: Abbe value of the positive lens in the first lens group GR1 with respect to the d-line θgF_1p: partial dispersion ratio of the positive lens in the first lens group GR1 with respect to the g-line and the F-line.

[0127] By applying a low-dispersion glass material with strong abnormal dispersion that satisfies conditional expressions (4) and (5) to the positive lens in the first lens group GR1, chromatic aberration, which is a problem in telephoto lenses, can be well corrected. When it is lower than the lower limit of conditional expression (4), the correction of the first and second order chromatic aberrations becomes insufficient, and the overall image rendering performance decreases. When it is lower than the lower limit of conditional expression (5), the correction of the second order chromatic aberration becomes insufficient, and the overall image rendering performance decreases. In addition, the first order chromatic aberration refers to the chromatic aberration between the F line and the C line, and the second order chromatic aberration refers to the chromatic aberration including the shorter wavelength region (representatively, the g line).

[0128] In order to achieve the effect of the above-mentioned conditional expression (5) more effectively, it is better to set the numerical range of the conditional expression (5) as shown in the following conditional expression (5)'.

[0129] θgF_1p-(-0.001801*νd_1p+0.648262)>0.05……(5)'

[0130] Furthermore, it is better to set the numerical range of conditional expression (5) as shown in the following conditional expression (5)".

[0131] θgF_1p-(-0.001801*νd_1p+0.648262)>0.06……(5)”

[0132] In the optical system of one embodiment, the 3c group GR3c preferably includes at least one negative lens satisfying the following conditional expression (6).

[0133] θgF_3cn-(-0.001801*νd_3cn+0.648262)>0.008……(6)

[0134] in,

[0135] θgF_3cn: The partial dispersion ratio of the g-line and F-line of the negative lens in the 3c group GR3c

[0136] νd_3cn: Abbe value of the negative lens in the 3c group GR3c with respect to the d-line.

[0137] By applying an anomalous dispersion glass material satisfying conditional expression (6) to the negative lens in the 3c group GR3c, the lateral chromatic aberration is well corrected, and good rendering performance can be obtained even in the peripheral part. When it is lower than the lower limit of conditional expression (6), the correction of the secondary lateral chromatic aberration becomes insufficient, and the rendering performance of the peripheral part of the picture is reduced.

[0138] In order to achieve the effect of the above-mentioned conditional expression (6) more effectively, it is better to set the numerical range of the conditional expression (6) as shown in the following conditional expression (6)'.

[0139] θgF_3cn-(-0.001801*νd_3cn+0.648262)>0.012……(6)'

[0140] Furthermore, it is better to set the numerical range of conditional expression (6) as shown in the following conditional expression (6)".

[0141] θgF_3cn-(-0.001801*νd_3cn+0.648262)>0.016……(6)”

[0142] In the optical system of one embodiment, the 3c group GR3c preferably includes at least one negative lens satisfying the following conditional expression (7).

[0143] νd_3cn<31……(7)

[0144] in,

[0145] νd_3cn: Abbe value of the negative lens in the 3c group GR3c with respect to the d-line.

[0146] By applying an anomalous dispersion glass material satisfying conditional expression (7) to the negative lens in the 3c group GR3c, the chromatic aberration of magnification is well corrected, and good rendering performance can be obtained even in the peripheral part. When the upper limit of conditional expression (7) is exceeded, the correction of the chromatic aberration of the first and second orders becomes insufficient, and the rendering performance of the entire picture is reduced.

[0147] In order to achieve the effect of the above-mentioned conditional expression (7) more effectively, it is better to set the numerical range of the conditional expression (7) as shown in the following conditional expression (7)'.

[0148] νd_3cn<28……(7)'

[0149] Furthermore, it is better to set the numerical range of conditional expression (7) as shown in the following conditional expression (7)".

[0150] νd_3cn<25……(7)”

[0151] In the optical system of one embodiment, the 3c group GR3c preferably includes at least one negative lens satisfying the following conditional expression (8).

[0152] 0<|f3cn / f|<0.15……(8)

[0153] in,

[0154] f3cn: focal length of the negative lens in the 3c group GR3c

[0155] f: The focal distance of the entire system when in focus at infinity.

[0156] By configuring a negative lens having a focal length satisfying the conditional expression (8) in the 3c group GR3c, the magnification chromatic aberration of the peripheral portion is corrected more effectively, and even the peripheral portion can obtain better rendering performance. When the upper limit of the conditional expression (8) is exceeded, the role of the negative lens disappears and the chromatic aberration correction effect cannot be achieved. When it is lower than the lower limit of the conditional expression (8), the focal length of the negative lens becomes too strong, and the correction state of the field curvature, astigmatism, and distortion aberration deteriorates.

[0157] In order to achieve the effect of the above-mentioned conditional expression (8) more effectively, it is better to set the numerical range of the conditional expression (8) as shown in the following conditional expression (8)'.

[0158] 0<|f3cn / f|<0.13……(8)'

[0159] Furthermore, it is better to set the numerical range of conditional expression (8) as shown in the following conditional expression (8)".

[0160] 0<|f3cn / f|<0.10……(8)”

[0161] In addition, in an optical system of one embodiment, the 3c group GR3c preferably includes at least one negative lens that simultaneously satisfies any of the above-mentioned conditional expressions (6), (7), and (8) and the following conditional expression (9).

[0162] D_3cnImg / f<0.15……(9)

[0163] in,

[0164] f: The focal distance of the entire system when infinity is in focus

[0165] D_3cnImg: The distance between the object-side surface vertex of the negative lens in the 3c group GR3c and the image plane Simg.

[0166] By placing a negative lens with high chromatic aberration correction capability close to the image plane in a manner that satisfies any of the above conditional expressions (6), (7), and (8) and conditional expression (9) at the same time, chromatic aberration is suppressed in the entire image area, and high rendering performance can be obtained. When the upper limit of conditional expression (9) is exceeded, the negative lens is far away from the image plane Simg, and the chromatic aberration correction capability becomes insufficient.

[0167] In order to achieve the effect of the above-mentioned conditional expression (9) more effectively, it is better to set the numerical range of the conditional expression (9) as shown in the following conditional expression (9)'.

[0168] D_3cnImg / f<0.14……(9)'

[0169] Furthermore, it is better to set the numerical range of conditional expression (9) as shown in the following conditional expression (9)".

[0170] D_3cnImg / f<0.12……(9)”

[0171] In the optical system of one embodiment, it is preferable that the first lens group GR1 includes at least one negative lens satisfying the following conditional expressions (10) and (11).

[0172] νd_1n<35……(10)

[0173] θgF_1n-(-0.001801*νd_1n+0.648262)<0.010……(11)

[0174] in,

[0175] νd_1n: Abbe value of the negative lens in the first lens group GR1 with respect to the d-line θgF_1n: partial dispersion ratio of the negative lens in the first lens group GR1 between the g-line and the F-line.

[0176] By applying a glass material having dispersion characteristics satisfying conditional expressions (10) and (11) to the negative lens in the first lens group GR1, chromatic aberration, which is a problem in telephoto lenses, can be corrected well. When the upper limit of conditional expression (10) is exceeded, correction of primary and secondary chromatic aberrations becomes insufficient, and the overall image rendering performance is reduced. When the upper limit of conditional expression (11) is exceeded, correction of secondary chromatic aberrations becomes insufficient, and the overall image rendering performance is reduced.

[0177] In order to achieve the effects of the above-mentioned conditional expressions (10) and (11) more effectively, it is better to set the numerical ranges of the conditional expressions (10) and (11) to the following conditional expressions (10)' and (11)'.

[0178] νd_1n<32……(10)'

[0179] θgF_1n-(-0.001801*νd_1n+0.648262)<0.009……(11)'

[0180] Furthermore, it is better to set the numerical range of conditional expression (10) as shown in the following conditional expression (10)".

[0181] νd_1n<27……(10)”

[0182] In addition, the optical system of one embodiment preferably satisfies the following conditional expression (12).

[0183] 0.05<|f3c / f|<0.3……(12)

[0184] in,

[0185] f3c: focal distance of 3c group GR3c

[0186] f: The focal distance of the entire system when in focus at infinity.

[0187] By setting the focal length of the 3c group GR3c within the range that satisfies conditional expression (12), the anti-shake sensitivity can be set to a value suitable for the anti-shake group, and good optical performance can be obtained during anti-shake. When the lower limit of conditional expression (12) is lowered, the power of the 3c group GR3c becomes too strong, and the correction state of image curvature, astigmatism, and distortion aberration deteriorates. When the upper limit of conditional expression (12) is exceeded, the power of the 3c group GR3c becomes too weak, and it is difficult to lower the anti-shake group to the rear while maintaining high optical performance during anti-shake.

[0188] In order to achieve the effect of the above-mentioned conditional expression (12) more effectively, it is better to set the numerical range of the conditional expression (12) as shown in the following conditional expression (12).

[0189] 0.05<|f3c / f|<0.15……(12)'

[0190] In the optical system of one embodiment, the second lens group GR2 preferably includes a cemented lens or a single lens, thereby obtaining a lightweight focusing group and realizing high-speed and high-following AF (autofocus) performance.

[0191] <3. Application example to imaging device>

[0192] Next, an example of application of the optical system according to one embodiment of the present disclosure to a specific imaging device will be described.

[0193] Fig.45 A configuration example of an imaging device 100 to which an optical system according to an embodiment is applied is shown. The imaging device 100 is, for example, a digital still camera, and includes a camera block 10, a camera signal processing unit 20, an image processing unit 30, an LCD (Liquid Crystal Display) 40, an R / W (Reader / Writer) 50, a CPU (Central Processing Unit) 60, an input unit 70, and a lens drive control unit 80.

[0194] The camera block 10 has an imaging function and includes an optical system including an imaging lens 110 and an imaging element 12 such as a CCD (Charge Coupled Devices) or a CMOS (Complementary Metal Oxide Semiconductor). The imaging element 12 converts an optical image formed by the imaging lens 110 into an electrical signal, thereby outputting an imaging signal (image signal) corresponding to the optical image. As the imaging lens 110, an image sensor 12 may be used. Figure 1 Optical systems 1 to 11 of the various structural examples shown in FIG.

[0195] The camera signal processing unit 20 performs various signal processing on the image signal output from the imaging element 12 , such as analog-to-digital conversion, noise removal, image quality correction, and conversion into brightness and color difference signals.

[0196] The image processing unit 30 performs recording and reproducing processing of image signals, compression encoding and decompression decoding processing of image signals based on a predetermined image data format, conversion processing of data specifications such as resolution, and the like.

[0197] The LCD 40 has a function of displaying various data such as the operation status of the user on the input unit 70 and the captured image. The R / W 50 writes the image data encoded by the image processing unit 30 to the memory card 1000 and reads the image data recorded in the memory card 1000. The memory card 1000 is, for example, a semiconductor memory that can be attached and detached from a socket connected to the R / W 50.

[0198] The CPU 60 functions as a control processing unit for controlling each circuit block provided in the imaging device 100, and controls each circuit block according to an instruction input signal or the like from the input unit 70. The input unit 70 includes various switches and the like for the user to perform a desired operation. The input unit 70 includes, for example, a shutter release button for performing a shutter operation, a selection switch for selecting an operation mode, and the like, and outputs an instruction input signal corresponding to the operation performed by the user to the CPU 60. The lens drive control unit 80 controls the drive of the lens arranged in the camera block 10, and controls a motor (not shown) and the like for driving each lens of the imaging lens 110 according to a control signal from the CPU 60.

[0199] The following describes the operation of the imaging device 100 .

[0200] In the standby state for photographing, the image signal photographed in the camera block 10 is input to the LCD 40 via the camera signal processing unit 20 under the control of the CPU 60, and is displayed as a camera review image. In addition, when, for example, an instruction input signal for zooming or focusing is input from the input unit 70, the CPU 60 outputs a control signal to the lens drive control unit 80, and a predetermined lens of the photographic lens 110 moves according to the control of the lens drive control unit 80.

[0201] When the shutter (not shown) of the camera block 10 is actuated according to the instruction input signal from the input unit 70, the captured image signal is output from the camera signal processing unit 20 to the image processing unit 30, and is compressed and encoded to be converted into digital data in a predetermined data format. The converted data is output to the R / W 50 and written to the memory card 1000.

[0202] In addition, focusing is performed by, for example, when the shutter release button of the input unit 70 is half-pressed or fully pressed for recording (photographing), the lens drive control unit 80 moves a predetermined lens of the imaging lens 110 according to a control signal from the CPU 60 .

[0203] When replaying image data recorded in the memory card 1000, the predetermined image data is read out from the memory card 1000 by R / W 50 according to the operation on the input unit 70, and after decompression and decoding processing is performed by the image processing unit 30, the replayed image signal is output to LCD 40 to display the replayed image.

[0204] In addition, in the above-mentioned embodiments, an example of applying the imaging device to a digital still camera is shown, but the application scope of the imaging device is not limited to digital still cameras, and it can be applied to various other imaging devices. For example, it can be applied to a digital SLR camera, a digital non-reflective camera, a digital video camera, and a surveillance camera. In addition, it can be widely used as a camera part of a digital input / output device such as a mobile phone with a built-in camera and an information terminal with a built-in camera. In addition, it can also be applied to a lens-interchangeable camera.

[0205] Example

[0206] <4. Numerical Example of Lens>

[0207] Next, a specific numerical example of an optical system according to an embodiment of the present disclosure is described. Figure 1 Embodiments of optical systems 1 to 11 of the various structural examples shown in FIG.

[0208] In addition, the meanings of the symbols shown in the following tables and descriptions are as follows. "Si" represents the surface number of the i-th surface from the object side. "ri" represents the radius of curvature of the i-th surface from the object side (unit: mm). "di" represents the axial surface interval between the i-th surface and the i+1-th surface from the object side (unit: mm). "ndi" represents the refractive index of the glass material or raw material having the i-th surface on the object side with respect to the d-line (wavelength 587.6nm). "νdi" represents the Abbe value of the glass material or raw material having the i-th surface on the object side with respect to the d-line. "θgF" represents the partial dispersion ratio of the g-line (wavelength 435.8nm) and the F-line (wavelength 486.1nm). Regarding the radius of curvature, "∞" indicates that the surface is a plane. "STO" in the column of the surface number indicates that an opening aperture St is arranged at the corresponding position. "f" represents the focal length of the entire lens system (unit: mm). "Fno" represents the open F value (F number). "ω" represents the half field angle (unit: °). "Y" represents the image height (unit: mm). "L" represents the total length of the lens (the distance from the surface of the optical system closest to the object to the image plane) (unit: mm). "BF" represents the back focus (unit: mm).

[0209] [Common Structure in Each Embodiment]

[0210] The optical systems 1 to 11 to which the following Examples 1 to 11 are applied all have structures satisfying the above-mentioned <1. Basic structure of lens>.

[0211] That is, the optical systems 1 to 11 all include the first lens group GR1 , the second lens group GR2 , and the third lens group GR3 .

[0212] The first lens group GR1 has a positive refractive power as a whole group, and the whole group is fixed with respect to the image plane Simg during focusing.

[0213] The second lens group GR2 has positive or negative refractive power as a whole group, and performs focusing from infinity to a short distance by moving the whole group in the optical axis direction.

[0214] The third lens group GR3 has negative or positive refractive power as a group as a whole, and the group as a whole is fixed relative to the image plane Simg during focusing. In addition, the third lens group GR3 is divided into 3a group GR3a, 3b group GR3b and 3c group GR3c in sequence from the object side to the image side. The 3b group GR3b is an anti-shake group, which moves in a direction substantially perpendicular to the optical axis Z1 to correct image shake.

[0215] The aperture stop St is arranged between the 3a group GR3a and the 3b group GR3b.

[0216] [Example 1]

[0217] [Table 1] shows the specific values ​​applied to Figure 1 The basic lens data of Example 1 of the optical system 1 shown in Table 2 are shown. In addition, the focal length (f), F value (Fno), half angle of view (ω), image height (Y), total lens length (L), and back focus (BF) when focusing at infinity are shown in Table 2. The values ​​of the variable surface spacing when focusing at infinity and at a close distance are shown in Table 3.

[0218] In the optical system 1 of Example 1, the first lens group GR1 includes seven lenses L11 to L17 in order from the object side to the image side. The largest air space on the optical axis in the first lens group GR1 is between the lens L11 and the lens L12.

[0219] In the optical system 1 of Example 1, the second lens group GR2 includes a cemented lens composed of lens L21 and lens L22 in order from the object side to the image side. The second lens group GR2 has a positive refractive power as a group as a whole, and when focusing from infinity to a short distance, the second lens group GR2 moves toward the object side.

[0220] In the optical system 1 of Example 1, the third lens group GR3 includes lenses L31 to L43 in order from the object side to the image side. The 3a group GR3a includes lenses L31 and L32. The 3b group GR3b includes lenses L33 to L35. The 3c group GR3c includes lenses L36 to L43. The third lens group GR3 has a negative refractive power as a whole.

[0221] [Table 1]

[0222]

[0223] [Table 2]

[0224]

[0225] [Table 3]

[0226]

[0227] exist Figure 2 2 shows the longitudinal aberration of the optical system 1 of Example 1 when the optical system 1 is in focus at infinity. Figure 2 In the figure, spherical aberration, astigmatism (field curvature), and distortion are shown as longitudinal aberrations. In the spherical aberration diagram, the dashed line represents the C line (wavelength 545.3nm), the solid line represents the d line (wavelength 587.6nm), and the dotted line represents the value on the g line (wavelength 435.8nm). In the astigmatism diagram, the solid line (S) represents the sagittal image plane of the d line, and the dashed line (T) represents the value at the tangential image plane of the d line. The values ​​on the d line are shown in the distortion diagram. In addition, Figure 3 as well as Figure 4 2 shows the lateral aberration of the optical system 1 of Example 1 when the optical system 1 is in focus at infinity. Figure 3 In the non-stabilization mode, Figure 4 2 shows the lateral aberration during anti-shake. In the lateral aberration diagram, y represents the image height, Δy represents the lateral aberration in the tangential direction, and Δx represents the lateral aberration in the sagittal direction. The same is true for the aberration diagrams in the other embodiments below.

[0228] As can be seen from the aberration diagrams, the optical system 1 of Example 1 is lightweight, has a center of gravity close to the imaging surface, is excellent in oscillation resistance, and has good optical performance with suppressed chromatic aberration of the entire image. In addition, the anti-shake effect is fully exerted in the telephoto region, and a high-quality image is obtained.

[0229] [Example 2]

[0230] [Table 4] shows the specific values ​​applied to Figure 5 The basic lens data of Example 2 of the optical system 2 shown in FIG. 5 shows the focal length (f), F value (Fno), half angle of view (ω), image height (Y), total lens length (L), and back focus (BF) when focusing at infinity. The values ​​of the variable surface spacing when focusing at infinity and at a close distance are shown in FIG.

[0231] In the optical system 2 of Example 2, the first lens group GR1 includes seven lenses L11 to L17 in order from the object side to the image side. The largest air space on the optical axis in the first lens group GR1 is between the lens L11 and the lens L12.

[0232] In the optical system 2 of Example 2, the second lens group GR2 includes a cemented lens composed of lens L21 and lens L22 in order from the object side to the image side. The second lens group GR2 has a positive refractive power as a group as a whole, and when focusing from infinity to a close distance, the second lens group GR2 moves toward the object side.

[0233] In the optical system 2 of Example 2, the third lens group GR3 includes lenses L31 to L43 in order from the object side to the image side. The 3a group GR3a includes lenses L31 and L32. The 3b group GR3b includes lenses L33 to L35. The 3c group GR3c includes lenses L36 to L43. The third lens group GR3 has a negative refractive power as a whole.

[0234] [Table 4]

[0235]

[0236] [Table 5]

[0237]

[0238] [Table 6]

[0239]

[0240] exist Figure 6 2 shows the longitudinal aberration of the optical system 2 of Example 2 when the infinity is focused. Figure 7 as well as Figure 8 2 shows the lateral aberration when the optical system 2 of Example 2 is in focus at infinity.

[0241] As can be seen from the aberration diagrams, the optical system 2 of Example 2 is lightweight, has a center of gravity close to the imaging surface, is excellent in oscillation resistance, and has good optical performance with suppressed chromatic aberration of the entire image. In addition, the anti-shake effect is fully exerted in the telephoto region, and a high-quality image is obtained.

[0242] [Example 3]

[0243] [Table 7] shows the specific values ​​applied to Fig. 9 The basic lens data of Example 3 of the optical system 3 shown in FIG. 8 shows the focal length (f), F value (Fno), half angle of view (ω), image height (Y), total lens length (L), and back focus (BF) when focusing at infinity. The values ​​of the variable surface spacing when focusing at infinity and at a close distance are shown in FIG.

[0244] In the optical system 3 of Example 3, the first lens group GR1 includes seven lenses L11 to L17 in order from the object side to the image side. The largest air space on the optical axis in the first lens group GR1 is between the lens L11 and the lens L12.

[0245] In the optical system 3 of Example 3, the second lens group GR2 includes a cemented lens composed of lens L21 and lens L22 in order from the object side to the image side. The second lens group GR2 has a positive refractive power as a group as a whole, and when focusing from infinity to a close distance, the second lens group GR2 moves toward the object side.

[0246] In the optical system 3 of Example 3, the third lens group GR3 includes lenses L31 to L44 in order from the object side to the image side. The 3a group GR3a includes lenses L31 and L32. The 3b group GR3b includes lenses L33 to L35. The 3c group GR3c includes lenses L36 to L44. The third lens group GR3 has a negative refractive power as a whole.

[0247] [Table 7]

[0248]

[0249] [Table 8]

[0250]

[0251] [Table 9]

[0252]

[0253] exist Fig.10 2 shows the longitudinal aberration of the optical system 3 of Example 3 when the optical system 3 is in focus at infinity. Fig.11 as well as Fig.12 2 shows the lateral aberration when the optical system 3 of Example 3 is in focus at infinity.

[0254] As can be seen from the aberration diagrams, the optical system 3 of Example 3 is lightweight, has a center of gravity close to the imaging surface, is excellent in oscillation resistance, and has good optical performance with suppressed chromatic aberration of the entire image. In addition, the anti-shake effect is fully exerted in the telephoto region, and a high-quality image is obtained.

[0255] [Example 4]

[0256] [Table 10] shows the specific values ​​applied to Fig.13 The basic lens data of Example 4 of the optical system 4 shown in Table 11 are shown. In addition, the focal length (f), F value (Fno), half angle of view (ω), image height (Y), total lens length (L), and back focus (BF) when focusing at infinity are shown in Table 11. The values ​​of the variable surface spacing when focusing at infinity and at a close distance are shown in Table 12.

[0257] In the optical system 4 of Example 4, the first lens group GR1 includes seven lenses L11 to L17 in order from the object side to the image side. The largest air space on the optical axis in the first lens group GR1 is between the lens L11 and the lens L12.

[0258] In the optical system 4 of Example 4, the second lens group GR2 includes a cemented lens composed of lens L21 and lens L22 in order from the object side to the image side. The second lens group GR2 has a positive refractive power as a group as a whole, and when focusing from infinity to a short distance, the second lens group GR2 moves toward the object side.

[0259] In the optical system 4 of Example 4, the third lens group GR3 includes lenses L31 to L44 in order from the object side to the image side. The 3a group GR3a includes lenses L31 and L32. The 3b group GR3b includes lenses L33 to L35. The 3c group GR3c includes lenses L36 to L44. The third lens group GR3 has a negative refractive power as a whole.

[0260] [Table 10]

[0261]

[0262] [Table 11]

[0263]

[0264] [Table 12]

[0265]

[0266] exist Fig.14 2 shows the longitudinal aberration of the optical system 4 of Example 4 when the optical system 4 is in focus at infinity. Fig.15 as well as Fig.16 2 shows the lateral aberration when the optical system 4 of Example 4 is in focus at infinity.

[0267] As can be seen from the aberration diagrams, the optical system 4 of Example 4 is lightweight, has a center of gravity close to the imaging surface, is excellent in oscillation resistance, and has good optical performance with suppressed chromatic aberration of the entire image. In addition, the anti-shake effect is fully exerted in the telephoto region, and a high-quality image is obtained.

[0268] [Example 5]

[0269] [Table 13] shows the specific values ​​applied to Fig.17 The basic lens data of Example 5 of the optical system 5 shown in Table 14 are shown. In addition, the focal length (f), F value (Fno), half angle of view (ω), image height (Y), total lens length (L), and back focus (BF) when focusing at infinity are shown in Table 14. The values ​​of the variable surface spacing when focusing at infinity and at a close distance are shown in Table 15.

[0270] In the optical system 5 of Example 5, the first lens group GR1 includes seven lenses L11 to L17 in order from the object side to the image side. The largest air space on the optical axis in the first lens group GR1 is between the lens L11 and the lens L12.

[0271] In the optical system 5 of Example 5, the second lens group GR2 includes a cemented lens composed of lens L21 and lens L22 in order from the object side to the image side. The second lens group GR2 has a positive refractive power as a group as a whole, and when focusing from infinity to a close distance, the second lens group GR2 moves toward the object side.

[0272] In the optical system 5 of Example 5, the third lens group GR3 includes lenses L31 to L43 in order from the object side to the image side. The 3a group GR3a includes lenses L31 and L32. The 3b group GR3b includes lenses L33 to L35. The 3c group GR3c includes lenses L36 to L43. The third lens group GR3 has a negative refractive power as a whole.

[0273] [Table 13]

[0274]

[0275] [Table 14]

[0276]

[0277] [Table 15]

[0278]

[0279] exist Fig.18 2 shows the longitudinal aberration of the optical system 5 of Example 5 when the optical system 5 is in focus at infinity. Fig.19 as well as Fig. 20 2 shows the lateral aberration when the optical system 5 of Example 5 is in focus at infinity.

[0280] As can be seen from the aberration diagrams, the optical system 5 of Example 5 is lightweight, has a center of gravity close to the imaging surface, is excellent in oscillation resistance, and has good optical performance with suppressed chromatic aberration of the entire image. In addition, the anti-shake effect is fully exerted in the telephoto region, and a high-quality image is obtained.

[0281] [Example 6]

[0282] [Table 16] shows the specific values ​​applied to Fig.21 The basic lens data of Example 6 of the optical system 6 shown in Table 17 are shown. In addition, the focal length (f), F value (Fno), half angle of view (ω), image height (Y), total lens length (L), and back focus (BF) when focusing at infinity are shown in Table 17. The values ​​of the variable surface spacing when focusing at infinity and at a close distance are shown in Table 18.

[0283] In the optical system 6 of Example 6, the first lens group GR1 includes seven lenses, namely, lenses L11 to L17, in order from the object side to the image side. The largest air space on the optical axis in the first lens group GR1 is between the lens L11 and the lens L12.

[0284] In the optical system 6 of Example 6, the second lens group GR2 includes a single lens (lens L21 ). The second lens group GR2 has a positive refractive power as a whole, and moves toward the object side when focusing from infinity to a short distance.

[0285] In the optical system 6 of Example 6, the third lens group GR3 includes lenses L31 to L45 in order from the object side to the image side. The 3a group GR3a includes lenses L31 and L32. The 3b group GR3b includes lenses L33 to L35. The 3c group GR3c includes lenses L36 to L45. The third lens group GR3 has a negative refractive power as a whole.

[0286] [Table 16]

[0287]

[0288] [Table 17]

[0289]

[0290] [Table 18]

[0291]

[0292] exist Fig. 22 2 shows the longitudinal aberration of the optical system 6 of Example 6 when the optical system 6 is in focus at infinity. Fig.23 as well as Fig.24 2 shows the lateral aberration when the optical system 6 of Example 6 is in focus at infinity.

[0293] As can be seen from the aberration diagrams, the optical system 6 of Example 6 is lightweight, has a center of gravity close to the imaging surface, is excellent in oscillation resistance, and has good optical performance with suppressed chromatic aberration of the entire image. In addition, the anti-shake effect is fully exerted in the telephoto region, and a high-quality image is obtained.

[0294] [Example 7]

[0295] [Table 19] shows the specific values ​​applied to Fig.25 The basic lens data of Example 7 of the optical system 7 shown in Table 20 are shown. In addition, the focal length (f), F value (Fno), half angle of view (ω), image height (Y), total lens length (L), and back focus (BF) when focusing at infinity are shown in Table 20. The values ​​of the variable surface spacing when focusing at infinity and at a close distance are shown in Table 21.

[0296] In the optical system 7 of Example 7, the first lens group GR1 includes six lenses L11 to L16 in order from the object side to the image side. The largest air space on the optical axis in the first lens group GR1 is between the lens L11 and the lens L12.

[0297] In the optical system 7 of Example 7, the second lens group GR2 includes a single lens (lens L21 ). The second lens group GR2 has a negative refractive power as a whole, and moves to the image side when focusing from infinity to a short distance.

[0298] In the optical system 7 of Example 7, the third lens group GR3 includes lenses L31 to L45 in order from the object side to the image side. The 3a group GR3a includes lenses L31 to L34. The 3b group GR3b includes lenses L35 to L37. The 3c group GR3c includes lenses L38 to L45. The third lens group GR3 has a negative refractive power as a whole.

[0299] [Table 19]

[0300]

[0301] [Table 20]

[0302]

[0303] [Table 21]

[0304]

[0305] exist Fig.26 2 shows the longitudinal aberration of the optical system 7 of Example 7 when the infinity is focused. Fig. 27 as well as Fig.28 2 shows the lateral aberration when the optical system 7 of Example 7 is in focus at infinity.

[0306] As can be seen from the aberration diagrams, the optical system 7 of Example 7 is lightweight, has a center of gravity close to the imaging surface, is excellent in oscillation resistance, and has good optical performance with suppressed chromatic aberration of the entire image. In addition, the anti-shake effect is fully exerted in the telephoto region, and a high-quality image is obtained.

[0307] [Example 8]

[0308] [Table 22] shows the specific values ​​applied to Fig.29 The basic lens data of Example 8 of the optical system 8 shown in Table 23 are shown in Table 24. In addition, the focal length (f), F value (Fno), half angle of view (ω), image height (Y), total lens length (L), and back focus (BF) when focusing at infinity are shown in Table 23. The variable surface spacing values ​​when focusing at infinity and at a close distance are shown in Table 24.

[0309] In the optical system 8 of Example 8, the first lens group GR1 includes six lenses L11 to L16 in order from the object side to the image side. The largest air space on the optical axis in the first lens group GR1 is between the lens L11 and the lens L12.

[0310] In the optical system 8 of Example 8, the second lens group GR2 includes a single lens (lens L21 ). The second lens group GR2 has a negative refractive power as a whole, and moves to the image side when focusing from infinity to a short distance.

[0311] In the optical system 8 of Example 8, the third lens group GR3 includes lenses L31 to L46 in order from the object side to the image side. The 3a group GR3a includes lenses L31 to L34. The 3b group GR3b includes lenses L35 to L37. The 3c group GR3c includes lenses L38 to L46. The third lens group GR3 has a negative refractive power as a whole.

[0312] [Table 22]

[0313]

[0314] [Table 23]

[0315]

[0316] [Table 24]

[0317]

[0318] exist Fig.30 Graph 1 shows the longitudinal aberration of the optical system 8 of Example 8 when the optical system 8 is in focus at infinity. Fig.31 as well as Fig.32 2 shows the lateral aberration when the optical system 8 of Example 8 is in focus at infinity.

[0319] As can be seen from the aberration diagrams, the optical system 8 of Example 8 is lightweight, has a center of gravity close to the imaging surface, is excellent in oscillation resistance, and has good optical performance with suppressed chromatic aberration of the entire image. In addition, the anti-shake effect is fully exerted in the telephoto region, and a high-quality image is obtained.

[0320] [Example 9]

[0321] [Table 25] shows the specific values ​​applied to Fig.33 The basic lens data of Example 9 of the optical system 9 shown in Table 26 are shown. In addition, the focal length (f), F value (Fno), half angle of view (ω), image height (Y), total lens length (L), and back focus (BF) when focusing at infinity are shown in Table 26. The values ​​of the variable surface spacing when focusing at infinity and at a close distance are shown in Table 27.

[0322] In the optical system 9 of Example 9, the first lens group GR1 includes six lenses L11 to L16 in order from the object side to the image side. The largest air space on the optical axis in the first lens group GR1 is between the lens L11 and the lens L12.

[0323] In the optical system 9 of Example 9, the second lens group GR2 includes a single lens (lens L21). The second lens group GR2 has a negative refractive power as a whole, and moves to the image side when focusing from infinity to a short distance.

[0324] In the optical system 9 of Example 9, the third lens group GR3 includes lenses L31 to L46 in order from the object side to the image side. The 3a group GR3a includes lenses L31 to L34. The 3b group GR3b includes lenses L35 to L37. The 3c group GR3c includes lenses L38 to L46. The third lens group GR3 has a negative refractive power as a whole.

[0325] [Table 25]

[0326]

[0327] [Table 26]

[0328]

[0329] [Table 27]

[0330]

[0331] exist Fig.34 Graph 1 shows the longitudinal aberration of the optical system 9 of Example 9 when the optical system 9 is in focus at infinity. Fig.35 as well as Fig.36 2 shows the lateral aberration when the optical system 9 of Example 9 is in focus at infinity.

[0332] As can be seen from the aberration diagrams, the optical system 9 of Example 9 is lightweight, has a center of gravity close to the imaging surface, is excellent in oscillation resistance, and has good optical performance with suppressed chromatic aberration of the entire image. In addition, the anti-shake effect is fully exerted in the telephoto region, and a high-quality image is obtained.

[0333] [Example 10]

[0334] [Table 28] shows the specific values ​​applied to Fig.37 The basic lens data of Example 10 of the optical system 10 shown in Table 29 are shown in Table 29. In addition, the focal length (f), F value (Fno), half angle of view (ω), image height (Y), total lens length (L), and back focus (BF) when focusing at infinity are shown in Table 29. The values ​​of the variable surface spacing when focusing at infinity and at a close distance are shown in Table 30.

[0335] In the optical system 10 of Example 10, the first lens group GR1 includes six lenses L11 to L16 in order from the object side to the image side. The largest air space on the optical axis in the first lens group GR1 is between the lens L11 and the lens L12.

[0336] In the optical system 10 of Example 10, the second lens group GR2 includes a cemented lens composed of lens L21 and lens L22 in order from the object side to the image side. The second lens group GR2 has a negative refractive power as a group as a whole, and when focusing from infinity to a short distance, the second lens group GR2 moves to the image side.

[0337] In the optical system 10 of Example 10, the third lens group GR3 includes lenses L31 to L46 in order from the object side to the image side. The 3a group GR3a includes lenses L31 to L34. The 3b group GR3b includes lenses L35 to L37. The 3c group GR3c includes lenses L38 to L46. The third lens group GR3 has a negative refractive power as a whole.

[0338] [Table 28]

[0339]

[0340] [Table 29]

[0341]

[0342] [Table 30]

[0343]

[0344] exist Fig.38 2 shows the longitudinal aberration of the optical system 10 of Example 10 when the optical system 10 is in focus at infinity. Fig.39 as well as Fig.40 2 shows the lateral aberration when the optical system 10 of Example 10 is in focus at infinity.

[0345] As can be seen from the aberration diagrams, the optical system 10 of Example 10 is lightweight, has a center of gravity close to the imaging plane, is excellent in oscillation resistance, and has good optical performance with suppressed chromatic aberration of the entire image. In addition, the anti-shake effect is fully exerted in the telephoto region, and a high-quality image is obtained.

[0346] [Example 11]

[0347] [Table 31] shows the specific values ​​applied to Fig.41The basic lens data of Example 11 of the optical system 11 shown in Table 32 are shown in Table 33. In addition, the focal length (f), F value (Fno), half angle of view (ω), image height (Y), total lens length (L), and back focus (BF) when focusing at infinity are shown in Table 32. The variable surface spacing values ​​when focusing at infinity and at a close distance are shown in Table 33.

[0348] In the optical system 11 of Example 11, the first lens group GR1 includes six lenses L11 to L16 in order from the object side to the image side. The largest air space on the optical axis in the first lens group GR1 is between the lens L11 and the lens L12.

[0349] In the optical system 11 of Example 11, the second lens group GR2 includes a cemented lens composed of lens L21 and lens L22 in order from the object side to the image side. The second lens group GR2 has a negative refractive power as a group as a whole, and when focusing from infinity to a close distance, the second lens group GR2 moves to the image side.

[0350] In the optical system 11 of Example 11, the third lens group GR3 includes lenses L31 to L46 in order from the object side to the image side. The 3a group GR3a includes lenses L31 to L34. The 3b group GR3b includes lenses L35 to L37. The 3c group GR3c includes lenses L38 to L46. The third lens group GR3 has positive refractive power as a whole.

[0351] [Table 31]

[0352]

[0353] [Table 32]

[0354]

[0355] [Table 33]

[0356]

[0357] exist Fig.42 2 shows the longitudinal aberration of the optical system 11 of Example 11 when the optical system 11 is in focus at infinity. Fig.43 as well as Fig.44 2 shows the lateral aberration when the optical system 11 of Example 11 is in focus at infinity.

[0358] As can be seen from the aberration diagrams, the optical system 11 of Example 11 is lightweight, has a center of gravity close to the imaging surface, is excellent in oscillation resistance, and has good optical performance with suppressed chromatic aberration of the entire image. In addition, the anti-shake effect is fully exerted in the telephoto region, and a high-quality image is obtained.

[0359] [Other numerical data of each embodiment]

[0360] Tables 34 to 41 show the results of summarizing the values ​​related to the above-mentioned conditional expressions for each embodiment. In Tables 34 to 41, the lens corresponding to each conditional expression is appropriately recorded together with the numerical value. As can be seen from Tables 34 to 41, the values ​​of each embodiment are within the numerical range of each conditional expression.

[0361] [Table 34]

[0362]

[0363] [Table 35]

[0364]

[0365] [Table 36]

[0366]

[0367] [Table 37]

[0368]

[0369] [Table 38]

[0370]

[0371] [Table 39]

[0372]

[0373] [Table 40]

[0374]

[0375] [Table 41]

[0376]

[0377] <5. Application Examples>

[0378] [5.1 First application example]

[0379] The technology disclosed herein can be applied to various products. For example, the technology disclosed herein can be implemented as a device mounted on any type of mobile object, such as an automobile, an electric car, a hybrid electric car, a two-wheeled motor vehicle, a bicycle, a personal mobile object, an airplane, an unmanned aerial vehicle, a ship, a robot, a construction machine, an agricultural machine (tractor), or the like.

[0380] Fig.467000 is a block diagram showing a schematic configuration example of a vehicle control system 7000 as an example of a mobile control system to which the technology disclosed in the present invention can be applied. The vehicle control system 7000 includes a plurality of electronic control units connected via a communication network 7010. Fig.46 In the example shown, the vehicle control system 7000 includes a drive system control unit 7100, a body system control unit 7200, a battery control unit 7300, an external information detection unit 7400, an internal information detection unit 7500, and a centralized control unit 7600. The communication network 7010 connecting the plurality of control units may be, for example, an in-vehicle communication network conforming to any standard such as CAN (Controller Area Network), LIN (Local Interconnect Network), LAN (Local Area Network), or FlexRay (registered trademark).

[0381] Each control unit includes a microcomputer that performs calculations according to various programs, a storage unit that stores programs executed by the microcomputer or parameters used for various calculations, and a drive circuit that drives various control objects. Each control unit includes a network I / F for communicating with other control units via the communication network 7010, and a communication I / F for communicating with devices or sensors inside and outside the vehicle through wired or wireless communication. Fig.46 76, as a functional structure of a centralized control unit 7600, a microcomputer 7610, a general communication I / F 7620, a dedicated communication I / F 7630, a positioning unit 7640, a beacon receiving unit 7650, an in-vehicle device I / F 7660, an audio and video output unit 7670, an in-vehicle network I / F 7680, and a storage unit 7690 are shown. Other control units also include a microcomputer, a communication I / F, a storage unit, and the like.

[0382] The drive system control unit 7100 controls the actions of devices associated with the drive system of the vehicle according to various programs. For example, the drive system control unit 7100 functions as a control device such as a drive force generating device for generating the drive force of the vehicle such as an internal combustion engine or a drive motor, a drive force transmission mechanism for transmitting the drive force to the wheels, a steering mechanism for adjusting the steering angle of the vehicle, and a braking device for generating the braking force of the vehicle. The drive system control unit 7100 may also have the function of a control device such as ABS (Antilock Brake System) or ESC (Electronic Stability Control).

[0383] The vehicle state detection unit 7110 is connected to the drive system control unit 7100. The vehicle state detection unit 7110 includes, for example, at least one of a gyro sensor for detecting the angular velocity of the axial rotation of the vehicle body, an acceleration sensor for detecting the acceleration of the vehicle, or a sensor for detecting the amount of operation of the accelerator pedal, the amount of operation of the brake pedal, the steering angle of the steering wheel, the engine speed, or the speed of the wheels. The drive system control unit 7100 performs calculation processing using the signal input from the vehicle state detection unit 7110 to control the internal combustion engine, the drive motor, the electric power steering device, or the brake device.

[0384] The body system control unit 7200 controls the actions of various devices equipped on the vehicle body according to various programs. For example, the body system control unit 7200 functions as a control device for a keyless entry system, a smart car lock system, a power window device, or various lights such as headlights, reverse lights, brake lights, direction indicators, or fog lights. In this case, radio waves or signals of various switches emitted from a portable device that replaces the key can be input to the body system control unit 7200. The body system control unit 7200 receives the input of these radio waves or signals and controls the door lock device, power window device, lights, etc. of the vehicle.

[0385] The battery control unit 7300 controls the secondary battery 7310, which is the power supply source for the driving motor, according to various programs. For example, information such as the battery temperature, the battery output voltage, or the remaining capacity of the battery is input to the battery control unit 7300 from a battery device having the secondary battery 7310. The battery control unit 7300 uses these signals to perform calculation processing, and performs temperature control of the secondary battery 7310 or control of a cooling device of the battery device.

[0386] The vehicle exterior information detection unit 7400 detects information outside the vehicle equipped with the vehicle control system 7000. For example, at least one of the camera unit 7410 and the vehicle exterior information detection unit 7420 is connected to the vehicle exterior information detection unit 7400. The camera unit 7410 includes at least one of a ToF (Time Of Flight) camera, a stereo camera, a SLR camera, an infrared camera, and other cameras. The vehicle exterior information detection unit 7420 includes, for example, an environmental sensor for detecting the current weather or meteorology or at least one of surrounding information detection sensors for detecting other vehicles, obstacles, pedestrians, etc. around the vehicle equipped with the vehicle control system 7000.

[0387] The environmental sensor may be, for example, at least one of a raindrop sensor for detecting rainy days, a fog sensor for detecting fog, a sunshine sensor for detecting the degree of sunshine, and a snow sensor for detecting snowfall. The surrounding information detection sensor may be at least one of an ultrasonic sensor, a radar device, and a LIDAR (Light Detection and Ranging, Laser Imaging Detection and Ranging) device. These camera units 7410 and the vehicle exterior information detection unit 7420 may be provided as independent sensors or devices, or as a device in which a plurality of sensors or devices are integrated.

[0388] Here, Fig.47 An example of the installation position of the camera unit 7410 and the vehicle exterior information detection unit 7420 is shown. The camera units 7910, 7912, 7914, 7916, and 7918 are installed, for example, at least one of the front nose, side mirrors, rear bumper, rear door, and upper portion of the front window glass in the vehicle interior of the vehicle 7900. The camera unit 7910 provided at the front nose and the camera unit 7918 provided at the upper portion of the front window glass in the vehicle interior mainly acquire images in front of the vehicle 7900. The camera units 7912 and 7914 provided at the side mirrors mainly acquire images on the side of the vehicle 7900. The camera unit 7916 provided at the rear bumper or rear door mainly acquires images at the rear of the vehicle 7900. The camera unit 7918 provided at the upper portion of the front window glass in the vehicle interior is mainly used to detect leading vehicles or pedestrians, obstacles, traffic lights, traffic signs, lanes, etc.

[0389] In addition, Fig.47 7910, 7912, 7914, 7916. An example of the photographing range of each camera unit 7910, 7912, 7914, 7916 is shown in FIG. The photographing range a represents the photographing range of the camera unit 7910 provided at the front nose, the photographing ranges b and c represent the photographing ranges of the camera units 7912 and 7914 provided at the side mirrors, respectively, and the photographing range d represents the photographing range of the camera unit 7916 provided at the rear bumper or the rear door. For example, the image data photographed by the cameras 7910, 7912, 7914, 7916 are overlapped, so that a bird's-eye view image of the vehicle 7900 can be obtained when viewed from above.

[0390] The vehicle exterior information detection units 7920, 7922, 7924, 7926, 7928, 7930 provided at the front, rear, side, corners, and upper portion of the windshield in the vehicle 7900 may be, for example, ultrasonic sensors or radar devices. The vehicle exterior information detection units 7920, 7926, 7930 provided at the front nose, rear bumper, rear door, and upper portion of the windshield in the vehicle 7900 may be, for example, LIDAR devices. These vehicle exterior information detection units 7920-7930 are mainly used for detecting preceding vehicles, pedestrians, obstacles, and the like.

[0391] Back to Fig.46 The description continues. The vehicle exterior information detection unit 7400 enables the camera unit 7410 to capture images outside the vehicle and receives the captured image data. In addition, the vehicle exterior information detection unit 7400 receives detection information from the connected vehicle exterior information detection unit 7420. In the case where the vehicle exterior information detection unit 7420 is an ultrasonic sensor, a radar device, or a LIDAR device, the vehicle exterior information detection unit 7400 emits ultrasonic waves or electromagnetic waves, etc., and receives information on the received reflected waves. The vehicle exterior information detection unit 7400 may also perform object detection processing or distance detection processing of people, vehicles, obstacles, signs, or characters on the road surface, etc., based on the received information. The vehicle exterior information detection unit 7400 may also perform environmental recognition processing such as identifying rainfall, fog, or road conditions, based on the received information. The vehicle exterior information detection unit 7400 may also calculate the distance to objects outside the vehicle based on the received information.

[0392] In addition, the vehicle exterior information detection unit 7400 may also perform image recognition processing or distance detection processing to identify people, vehicles, obstacles, signs, or characters on the road surface based on the received image data. The vehicle exterior information detection unit 7400 may also perform distortion correction or position alignment processing on the received image data, and synthesize the image data captured by different camera units 7410 to generate a bird's-eye view image or a panoramic image. The vehicle exterior information detection unit 7400 may also use the image data captured by different camera units 7410 to perform viewpoint transformation processing.

[0393] The in-vehicle information detection unit 7500 detects information inside the vehicle. The in-vehicle information detection unit 7500 is connected to a driver state detection unit 7510 that detects the state of the driver, for example. The driver state detection unit 7510 may also include a camera that takes a video of the driver, a biosensor that detects the biological information of the driver, or a microphone that collects sounds inside the vehicle. The biosensor is, for example, disposed on a seat surface or a steering wheel, and detects the biological information of a passenger sitting on the seat or a driver holding the steering wheel. The in-vehicle information detection unit 7500 can calculate the driver's fatigue level or concentration level based on the detection information input from the driver state detection unit 7510, and can also determine whether the driver is not dozing off. The in-vehicle information detection unit 7500 may also perform denoising and other processing on the collected sound signal.

[0394] The centralized control unit 7600 controls the entire operation in the vehicle control system 7000 according to various programs. The input unit 7800 is connected to the centralized control unit 7600. The input unit 7800 is realized by a device such as a touch panel, a button, a microphone, a switch or a joystick that can be input by the passenger. Data obtained by voice recognition of the sound input by the microphone can also be input to the centralized control unit 7600. The input unit 7800 can be, for example, a remote control device using infrared or other radio waves, or an external connection device such as a mobile phone or PDA (Personal Digital Assistant) corresponding to the operation of the vehicle control system 7000. The input unit 7800 can also be, for example, a camera, in which case the passenger can input information through gestures. Alternatively, data obtained by detecting the movement of a wearable device worn by the passenger can also be input. Furthermore, the input unit 7800 can also include, for example, an input control circuit that generates an input signal based on the information input by the passenger using the above-mentioned input unit 7800 and outputs it to the centralized control unit 7600. Passengers and the like operate the input unit 7800 to input various data to the vehicle control system 7000 or instruct processing operations.

[0395] The storage unit 7690 may also include a ROM (Read Only Memory) for storing various programs executed by the microcomputer and a RAM (Random Access Memory) for storing various parameters, operation results or sensor values. In addition, the storage unit 7690 may also be implemented by a magnetic storage device such as a HDD (Hard Disc Drive), a semiconductor storage device, an optical storage device, or an optical magnetic storage device.

[0396] The general communication I / F 7620 is a general communication I / F that relays communication with various devices existing in the external environment 7750. The general communication I / F 7620 can be installed with cellular communication protocols such as GSM (registered trademark) (Global System of Mobilecommunications), WiMAX (registered trademark), LTE (registered trademark) (Long Term Evolution) or LTE-A (LTE-Advanced) or other wireless communication protocols such as wireless LAN (also called Wi-Fi (registered trademark)) and Bluetooth (registered trademark). The general communication I / F 7620 can also be connected to a device (for example, an application server or a control server) existing in an external network (for example, the Internet, a cloud network, or a network inherent to an operator) via a base station or an access point. In addition, the general communication I / F 7620 can also be connected to a terminal (for example, a terminal of a driver, a pedestrian, or a store, or an MTC (Machine Type Communication) terminal) existing near the vehicle using, for example, P2P (Peer To Peer) technology.

[0397] The dedicated communication I / F 7630 is a communication I / F that supports a communication protocol developed for use in a vehicle. The dedicated communication I / F 7630 can be installed with, for example, a standard protocol such as WAVE (Wireless Access in Vehicle Environment), which is a combination of the lower layer IEEE802.11p and the upper layer IEEE1609, DSRC (Dedicated Short Range Communications), or a cellular communication protocol. The dedicated communication I / F 7630 typically performs V2X communication, which is a concept of communication including one or more of vehicle-to-vehicle communication, vehicle-to-infrastructure communication, vehicle-to-home communication, and vehicle-to-pedestrian communication.

[0398] The positioning unit 7640 performs positioning by, for example, receiving GNSS signals from GNSS (Global Navigation Satellite System) satellites (e.g., GPS signals from GPS (Global Positioning System) satellites), and generates location information including the latitude, longitude, and altitude of the vehicle. In addition, the positioning unit 7640 can determine the current location by exchanging signals with a wireless access point, or can obtain location information from a terminal such as a mobile phone, PHS, or smart phone with a positioning function.

[0399] The beacon receiving unit 7650 receives radio waves or electromagnetic waves emitted from a wireless station installed on the road, and obtains information such as the current position, congestion, prohibited passage, or required time. In addition, the function of the beacon receiving unit 7650 can also be included in the dedicated communication I / F 7630.

[0400] The in-vehicle device I / F 7660 is a communication interface that relays the connection between the microcomputer 7610 and various in-vehicle devices 7760 present in the vehicle. The in-vehicle device I / F 7660 may also establish a wireless connection using a wireless communication protocol such as a wireless LAN, Bluetooth (registered trademark), NFC (Near Field Communication), or WUSB (Wireless USB). In addition, the in-vehicle device I / F 7660 may also establish a wired connection such as USB (Universal Serial Bus), HDMI (registered trademark) (High-Definition Multimedia Interface), or MHL (Mobile High-definition Link) via a connection terminal (and, if necessary, a cable) not shown in the figure. The in-vehicle device 7760 may also include, for example, a mobile device or wearable device owned by a passenger, or at least one device placed in or installed in an information device of the vehicle. In addition, the in-vehicle device 7760 may also include a navigation device that searches for a route to an arbitrary destination. The in-vehicle device I / F 7660 exchanges control signals or data signals with these in-vehicle devices 7760 .

[0401] The in-vehicle network I / F 7680 is an interface for relaying communication between the microcomputer 7610 and the communication network 7010. The in-vehicle network I / F 7680 transmits and receives signals and the like in accordance with a predetermined protocol supported by the communication network 7010.

[0402] The microcomputer 7610 of the centralized control unit 7600 controls the vehicle control system 7000 according to various programs based on information acquired through at least one of the general communication I / F 7620, the dedicated communication I / F 7630, the positioning unit 7640, the beacon receiving unit 7650, the in-vehicle device I / F 7660, and the in-vehicle network I / F 7680. For example, the microcomputer 7610 may also calculate the control target value of the driving force generating device, the steering mechanism, or the braking device based on the acquired information inside and outside the vehicle, and output a control command to the driving system control unit 7100. For example, the microcomputer 7610 may also perform coordinated control for the purpose of realizing functions of an ADAS (Advanced Driver Assistance System) including collision avoidance or impact mitigation of the vehicle, following driving based on the vehicle-to-vehicle distance, speed maintenance driving, collision warning of the vehicle, or lane departure warning of the vehicle. In addition, the microcomputer 7610 can also control the driving force generating device, steering mechanism or braking device based on the acquired information about the surroundings of the vehicle, thereby performing coordinated control for the purpose of automatic driving such as autonomous driving without relying on the driver's operation.

[0403] The microcomputer 7610 may also generate 3D distance information between the vehicle and surrounding structures, people, etc., and create local map information including surrounding information of the current position of the vehicle based on information acquired via at least one of the general communication I / F 7620, the dedicated communication I / F 7630, the positioning unit 7640, the beacon receiving unit 7650, the in-vehicle device I / F 7660, and the vehicle network I / F 7680. In addition, the microcomputer 7610 may also generate a warning signal based on the acquired information by predicting dangers such as a collision of the vehicle, the approach of pedestrians, etc., or the entry into a road where traffic is prohibited. The warning signal may be, for example, a signal for generating a warning sound or lighting a warning light.

[0404] The audio and video output unit 7670 transmits an output signal of at least one of audio and video to an output device capable of visually or auditorily notifying the vehicle passengers or the outside of the vehicle of information. Fig.46In the example, as output devices, an audio speaker 7710, a display unit 7720, and a dashboard 7730 are illustrated. The display unit 7720 may also include, for example, at least one of an on-board display and a head-up display. The display unit 7720 may also have an AR (Augmented Reality) display function. The output device may also be other devices other than these devices, such as wearable devices such as headphones, glasses-type displays worn by passengers, projectors, or lights. In the case where the output device is a display device, the display device visually displays the results obtained by various processing performed by the microcomputer 7610 or information received from other control units in various forms such as text, pictures, tables, and graphs. In addition, in the case where the output device is a sound output device, the sound output device converts an audio signal containing reproduced sound data or sound data into an analog signal and outputs it auditorily.

[0405] In addition, Fig.46 In the example shown, at least two control units connected via the communication network 7010 may be integrated into one control unit. Alternatively, each control unit may include a plurality of control units. Furthermore, the vehicle control system 7000 may include other control units not shown. In addition, in the above description, other control units may also have a part or all of the functions undertaken by any control unit. In other words, as long as information is sent and received via the communication network 7010, any control unit may perform predetermined calculation processing. Similarly, a sensor or device connected to any control unit may be connected to other control units, and a plurality of control units may send and receive detection information to each other via the communication network 7010.

[0406] In the vehicle control system 7000 described above, the optical system and the imaging device of the present disclosure can be applied to the imaging unit 7410 and the imaging units 7910 , 7912 , 7914 , 7916 , and 7918 .

[0407] [5.2 Second application example]

[0408] The technology of the present disclosure may also be applied to endoscopic surgical systems.

[0409] Fig.48 FIG. 5 is a diagram showing an example of a schematic structure of an endoscopic surgery system 5000 to which the technology disclosed in the present invention can be applied. Fig.48, the figure shows a situation where a surgeon (doctor) 5067 uses an endoscopic surgery system 5000 to perform surgery on a patient 5071 on a patient bed 5069. As shown in the figure, the endoscopic surgery system 5000 includes an endoscope 5001, other surgical tools 5017, a support arm device 5027 supporting the endoscope 5001, and a cart 5037 equipped with various devices for endoscopic surgery.

[0410] In endoscopic surgery, instead of cutting open the abdominal wall, a cylindrical hole-opening device called a trocar 5025a to 5025d performs multiple punctures in the abdominal wall. Then, the endoscope barrel 5003 of the endoscope 5001 and other surgical tools 5017 are inserted into the body cavity of the patient 5071 from the trocar 5025a to 5025d. In the example shown in the figure, as other surgical tools 5017, a pneumoperitoneum tube 5019, an energy treatment tool 5021 and forceps 5023 are inserted into the body cavity of the patient 5071. In addition, the energy treatment tool 5021 is a treatment tool that performs tissue cutting and peeling or blood vessel sealing by high-frequency current and ultrasonic vibration. However, the surgical tool 5017 shown in the figure is only an example, and various surgical tools generally used in endoscopic surgery, such as forceps and retractors, can be used as the surgical tool 5017.

[0411] The image of the surgical part in the body cavity of the patient 5071 photographed by the endoscope 5001 is displayed on the display device 5041. The surgeon 5067 performs treatment such as excision of the affected part while observing the image of the surgical part displayed on the display device 5041 in real time, using the energy treatment tool 5021 and the forceps 5023. In addition, although not shown in the figure, the pneumoperitoneum tube 5019, the energy treatment tool 5021 and the forceps 5023 are supported by the surgeon 5067 or an assistant during the operation.

[0412] (Support arm device)

[0413] The support arm device 5027 includes an arm 5031 extending from a base 5029. In the example shown in the figure, the arm 5031 includes joints 5033a, 5033b, 5033c and link rods 5035a, 5035b, and is driven by control from an arm control device 5045. The endoscope 5001 is supported by the arm 5031, and its position and posture are controlled. Thus, the stable position of the endoscope 5001 can be fixed.

[0414] (Endoscope)

[0415] The endoscope 5001 includes: a lens barrel 5003, a region of a predetermined length from the front end of which is inserted into the body cavity of the patient 5071; and a camera head 5005 connected to the base end of the lens barrel 5003. In the illustrated example, the endoscope 5001 is shown as a so-called rigid scope having a rigid lens barrel 5003, but the endoscope 5001 may also be configured as a so-called flexible scope having a flexible lens barrel 5003.

[0416] An opening in which an objective lens is embedded is provided at the front end of the lens barrel 5003. A light source device 5043 is connected to the endoscope 5001, and light generated by the light source device 5043 is guided to the front end of the lens barrel by a light guide extending inside the lens barrel 5003, and irradiates the observation object in the body cavity of the patient 5071 through the objective lens. In addition, the endoscope 5001 can be a straight-view mirror, an oblique-view mirror, or a side-view mirror.

[0417] An optical system and an imaging element are provided inside the camera head 5005, and the reflected light (observation light) from the observation object is focused to the imaging element by the optical system. The imaging element performs photoelectric conversion on the observation light to generate an electrical signal corresponding to the observation light, that is, an image signal corresponding to the observation image. The image signal is sent to the camera control unit (CCU: Camera Control Unit) 5039 as raw (RAW) data. In addition, the camera head 5005 is equipped with a function of adjusting the magnification and focal length by appropriately driving its optical system.

[0418] In addition, for example, a plurality of imaging elements may be provided in the camera head 5005 to cope with stereoscopic viewing (3D display), etc. In this case, a plurality of relay optical systems are provided inside the lens barrel 5003 to guide observation light to each of the plurality of imaging elements.

[0419] (Various devices mounted on the cart)

[0420] CCU5039 includes a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), etc., and centrally controls the operation of the endoscope 5001 and the display device 5041. Specifically, CCU5039 performs various image processing such as development processing (demosaicing processing) on ​​the image signal received from the camera head 5005 for displaying an image based on the image signal. CCU5039 provides the image signal after the image processing to the display device 5041. In addition, CCU5039 sends a control signal to the camera head 5005 to control its driving. The control signal may include information related to the imaging conditions such as magnification and focal length.

[0421] The display device 5041 displays an image based on an image signal processed by the CCU 5039 under the control of the CCU 5039. When the endoscope 5001 corresponds to high-resolution photography such as 4K (3840 horizontal pixels × 2160 vertical pixels) or 8K (7680 horizontal pixels × 4320 vertical pixels) and / or corresponds to 3D display, a device capable of high-resolution display and / or a device capable of 3D display can be used as the display device 5041. When corresponding to high-resolution photography such as 4K or 8K, a device with a size of 55 inches or more is used as the display device 5041, so that a further sense of immersion can be obtained. In addition, multiple display devices 5041 with different resolutions and sizes can be provided according to the purpose.

[0422] The light source device 5043 includes a light source such as an LED (light emitting diode), and supplies irradiation light for photographing a surgical area to the endoscope 5001 .

[0423] The arm control device 5045 includes a processor such as a CPU, and operates according to a predetermined program, thereby controlling the drive of the arm portion 5031 of the support arm device 5027 according to a predetermined control method.

[0424] The input device 5047 is an input interface for the endoscopic surgery system 5000. The user can input various information and instructions to the endoscopic surgery system 5000 via the input device 5047. For example, the user inputs various information related to the surgery, such as the patient's physical information and information about the surgical method, via the input device 5047. In addition, for example, the user inputs instructions to drive the arm 5031, to change the imaging conditions (such as the type of irradiation light, magnification, and focal length) based on the endoscope 5001, and to drive the energy treatment tool 5021, etc., via the input device 5047.

[0425] The type of input device 5047 is not limited, and the input device 5047 may be various known input devices. As the input device 5047, for example, a mouse, a keyboard, a touch panel, a switch, a foot switch 5057 and / or a joystick can be applied. When a touch panel is used as the input device 5047, the touch panel may also be provided on the display surface of the display device 5041.

[0426] Alternatively, the input device 5047 is, for example, a glasses-type wearable device, an HMD (Head Mounted Display) or other device worn by the user, and various inputs are performed based on the posture and line of sight of the user detected by these devices. In addition, the input device 5047 includes a camera capable of detecting the user's movements, and various inputs are performed based on the posture and line of sight of the user detected from the image captured by the camera. Furthermore, the input device 5047 includes a microphone capable of collecting the user's voice, and various inputs are performed through the microphone by sound. In this way, the input device 5047 is configured to be able to input various information non-contactly, so that in particular users belonging to the clean area (such as the surgeon 5067) can operate the equipment belonging to the non-clean area non-contactly. In addition, the user can operate the equipment without removing his hand from the surgical tool he holds, so the convenience of the user is improved.

[0427] The treatment tool control device 5049 controls the driving of the energy treatment tool 5021 for burning, cutting or sealing of the tissue or blood vessels. The pneumoperitoneum device 5051 inflates the body cavity of the patient 5071 for the purpose of ensuring the field of view of the endoscope 5001 and ensuring the working space of the surgeon, and gas is sent into the body cavity through the pneumoperitoneum tube 5019. The recorder 5053 is a device capable of recording various information related to the operation. The printer 5055 is a device capable of printing various information related to the operation in various forms such as text, images or graphs.

[0428] Hereinafter, the particularly characteristic structure of the endoscopic surgery system 5000 will be described in more detail.

[0429] (Support arm device)

[0430] The support arm device 5027 includes a base 5029 as a base and an arm 5031 extending from the base 5029. In the example shown in the figure, the arm 5031 includes a plurality of joints 5033a, 5033b, 5033c and a plurality of links 5035a, 5035b connected by the joints 5033b, but Fig.48 In the figure, the structure of the arm 5031 is simplified for simplicity. In fact, the shape, number and arrangement of the joints 5033a to 5033c and the links 5035a and 5035b and the direction of the rotation axis of the joints 5033a to 5033c can be appropriately set so that the arm 5031 has a desired degree of freedom. For example, the arm 5031 can be appropriately configured to have more than 6 degrees of freedom. Thus, the endoscope 5001 can be freely moved within the movable range of the arm 5031, so that the lens barrel 5003 of the endoscope 5001 can be inserted into the body cavity of the patient 5071 from a desired direction.

[0431] An actuator is provided at the joints 5033a to 5033c, and the joints 5033a to 5033c are configured to be rotatable around a predetermined rotation axis by the drive of the actuator. The drive of the actuator is controlled by the arm control device 5045, thereby controlling the rotation angle of each joint 5033a to 5033c and controlling the drive of the arm 5031. In this way, the position and posture of the endoscope 5001 can be controlled. At this time, the arm control device 5045 can control the drive of the arm 5031 by various known control methods such as force control or position control.

[0432] For example, the surgeon 5067 can appropriately perform operation input via the input device 5047 (including the foot switch 5057), so that the arm control device 5045 can appropriately control the drive of the arm 5031 according to the operation input, and control the position and posture of the endoscope 5001. Through this control, the endoscope 5001 at the front end of the arm 5031 can be moved from any position to any position, and then fixedly supported at the position after the movement. In addition, the arm 5031 can also be operated in a so-called master-slave manner. In this case, the arm 5031 can be remotely operated by the user via the input device 5047 set in a place away from the operating room.

[0433] In addition, when force control is applied, the arm control device 5045 may also perform so-called power assist control in which the actuators of the joints 5033a to 5033c are driven in such a manner that the arm 5031 is moved smoothly in accordance with the external force received from the user. Thus, the user can move the arm 5031 with a relatively light force while directly contacting the arm 5031. Thus, the endoscope 5001 can be moved by a more intuitive and simpler operation, which can improve the convenience of the user.

[0434] Here, generally, in endoscopic surgery, a doctor called an observer supports the endoscope 5001. In contrast, by using the support arm device 5027, the position of the endoscope 5001 can be more reliably fixed regardless of the human hand, so that the image of the surgical part can be stably obtained, and the surgery can be performed smoothly.

[0435] In addition, the arm control device 5045 does not need to be provided on the cart 5037. In addition, the arm control device 5045 does not need to be a single device. For example, the arm control device 5045 may be provided on each joint 5033a to 5033c of the arm 5031 of the supporting arm device 5027, or a plurality of arm control devices 5045 may cooperate with each other to realize the drive control of the arm 5031.

[0436] (Light source device)

[0437] The light source device 5043 supplies the irradiation light for photographing the surgical part to the endoscope 5001. The light source device 5043 includes, for example, a white light source composed of an LED, a laser source, or a combination thereof. At this time, when the white light source is composed of a combination of RGB laser sources, the output intensity and output timing of each color (each wavelength) can be controlled with high precision, so the white balance of the captured image can be adjusted in the light source device 5043. In addition, in this case, the lasers from the RGB laser sources are irradiated to the observed object in a time-sharing manner, and the driving of the imaging element of the camera head 5005 is controlled synchronously with the irradiation timing, so that the images corresponding to RGB can also be photographed in a time-sharing manner. According to this method, even if a color filter is not provided on the imaging element, a color image can be obtained.

[0438] In addition, the light source device 5043 can also be controlled to change the intensity of the light output at each predetermined time. The driving of the imaging element of the camera head 5005 is controlled synchronously with the timing of the change in the intensity of the light, and images are acquired in a time-sharing manner. The images are synthesized, thereby generating a high dynamic range image without so-called black spots and white spots.

[0439] In addition, the light source device 5043 can also be configured to supply light of a predetermined wavelength frequency domain corresponding to special light observation. In special light observation, for example, so-called narrow band light observation (Narrow Band Imaging) is performed as follows: by utilizing the wavelength dependence of light absorption in body tissue, light having a narrower bandwidth than the light (i.e., white light) during normal observation is irradiated, thereby photographing predetermined tissues such as blood vessels on the surface of the mucosa with high contrast. Alternatively, in special light observation, fluorescence observation can also be performed to obtain an image using fluorescence generated by irradiating excitation light. In fluorescence observation, excitation light can be irradiated to body tissue to observe fluorescence from the body tissue (autofluorescence observation), or a reagent such as indocyanine green (ICG) can be locally injected into the body tissue, and excitation light corresponding to the fluorescence wavelength of the reagent is irradiated to the body tissue to obtain a fluorescent image, etc. The light source device 5043 can be configured to supply narrow band light and / or excitation light corresponding to such special light observation.

[0440] (Camera head and CCU)

[0441] Reference Fig.49 , describing in more detail the functions of the camera head 5005 and CCU 5039 of the endoscope 5001. Fig.49 It is shown Fig.48 A block diagram showing an example of the functional structure of the camera head 5005 and the CCU 5039 is shown.

[0442] Reference Fig.49 The camera head 5005 has a lens unit 5007, an imaging unit 5009, a driving unit 5011, a communication unit 5013, and a camera head control unit 5015 as its functions. In addition, the CCU 5039 has a communication unit 5059, an image processing unit 5061, and a control unit 5063 as its functions. The camera head 5005 and the CCU 5039 are connected to each other via a transmission cable 5065 so as to be able to communicate bidirectionally.

[0443] First, the functional structure of the camera head 5005 is described. The lens unit 5007 is an optical system provided at the connection portion with the lens barrel 5003. The observation light taken in from the front end of the lens barrel 5003 is guided to the camera head 5005 and incident on the lens unit 5007. The lens unit 5007 is composed of a combination of a plurality of lenses including a zoom lens and a focus lens. The lens unit 5007 adjusts its optical characteristics in such a way that the observation light is focused on the light receiving surface of the imaging element of the imaging unit 5009. In addition, the zoom lens and the focus lens are configured so that the position on the optical axis can be moved in order to adjust the magnification and focus of the captured image.

[0444] The imaging unit 5009 includes an imaging element and is disposed at the rear stage of the lens unit 5007. The observation light that has passed through the lens unit 5007 is focused on the light receiving surface of the imaging element, and an image signal corresponding to the observation image is generated by photoelectric conversion. The image signal generated by the imaging unit 5009 is provided to the communication unit 5013.

[0445] As the imaging element constituting the imaging unit 5009, for example, a CMOS (Complementary Metal Oxide Semiconductor) type image sensor is used, and an element capable of color photography with a Bayer arrangement is used. In addition, as the imaging element, for example, an imaging element capable of photographing images with a high resolution of 4K or more can also be used. By obtaining an image of the surgical part at a high resolution, the surgeon 5067 can understand the situation of the surgical part in more detail and can perform the surgery more smoothly.

[0446] In addition, the imaging element constituting the imaging unit 5009 is configured to have a pair of imaging elements for acquiring image signals for the right eye and the left eye respectively corresponding to the 3D display. By performing 3D display, the surgeon 5067 can more accurately grasp the depth of the biological tissue at the surgical site. In addition, when the imaging unit 5009 is configured by a multi-plate type, a plurality of lens units 5007 are also provided corresponding to each imaging element.

[0447] In addition, the imaging unit 5009 does not necessarily need to be provided in the camera head 5005. For example, the imaging unit 5009 may be provided inside the lens barrel 5003, immediately after the objective lens.

[0448] The driving unit 5011 is composed of an actuator, and moves the zoom lens and the focus lens of the lens unit 5007 by a predetermined distance along the optical axis under the control of the camera head control unit 5015. This allows the magnification and focus of the image captured by the imaging unit 5009 to be appropriately adjusted.

[0449] The communication unit 5013 includes a communication device for sending and receiving various information between the CCU5039. The communication unit 5013 sends the image signal obtained from the camera unit 5009 as RAW data to the CCU5039 via the transmission cable 5065. At this time, in order to display the camera image of the surgical part with low latency, the image signal is preferably sent via optical communication. This is because during the operation, the surgeon 5067 observes the state of the affected part based on the camera image while performing the operation, so in order to perform a safer and more reliable operation, it is required to display the dynamic image of the surgical part as real time as possible. In the case of optical communication, a photoelectric conversion module that converts electrical signals into optical signals is set in the communication unit 5013. After the image signal is converted into an optical signal by the photoelectric conversion module, it is sent to the CCU5039 via the transmission cable 5065.

[0450] In addition, the communication unit 5013 receives a control signal for controlling the drive of the camera head 5005 from the CCU 5039. The control signal includes information related to the shooting conditions, such as information specifying the frame rate of the captured image, information specifying the exposure value during shooting, and / or information specifying the magnification and focus of the captured image. The communication unit 5013 provides the received control signal to the camera head control unit 5015. In addition, the control signal from the CCU 5039 can also be transmitted through optical communication. In this case, a photoelectric conversion module that converts an optical signal into an electrical signal is provided in the communication unit 5013, and the control signal is provided to the camera head control unit 5015 after being converted into an electrical signal by the photoelectric conversion module.

[0451] In addition, the control unit 5063 of the CCU 5039 automatically sets the above-mentioned imaging conditions such as the frame rate, exposure value, magnification, and focus according to the acquired image signal. In other words, the so-called AE (Auto Exposure) function, AF (Auto Focus) function, and AWB (Auto White Balance) function are installed in the endoscope 5001.

[0452] The camera head control unit 5015 controls the driving of the camera head 5005 based on the control signal received from the CCU 5039 via the communication unit 5013. For example, the camera head control unit 5015 controls the driving of the imaging element of the imaging unit 5009 based on the information indicating the frame rate of the captured image and / or the information indicating the exposure during the image capturing. In addition, for example, the camera head control unit 5015 appropriately moves the zoom lens and the focus lens of the lens unit 5007 via the driving unit 5011 based on the information indicating the magnification and focus of the captured image. The camera head control unit 5015 may also have a function of storing information for identifying the lens barrel 5003 and the camera head 5005.

[0453] Furthermore, by arranging the lens unit 5007, the imaging unit 5009 and other components in a sealed structure with high airtightness and waterproofness, the camera head 5005 can be made resistant to high-pressure sterilization.

[0454] Next, the functional structure of CCU5039 is described. The communication unit 5059 includes a communication device for sending and receiving various information between the camera head 5005. The communication unit 5059 receives an image signal sent via the transmission cable 5065 from the camera head 5005. At this time, as described above, the image signal can be appropriately sent through optical communication. In this case, corresponding to the optical communication, a photoelectric conversion module that converts the optical signal into an electrical signal is provided in the communication unit 5059. The communication unit 5059 provides the image signal converted into an electrical signal to the image processing unit 5061.

[0455] In addition, the communication unit 5059 transmits a control signal for controlling the driving of the camera head 5005 to the camera head 5005. The control signal may be transmitted by optical communication.

[0456] The image processing unit 5061 performs various image processing on the image signal as RAW data sent from the camera head 5005. Such image processing includes, for example, various known signal processing such as development processing, high image quality processing (frequency domain emphasis processing, super-resolution processing, NR (Noise reduction) processing and / or hand shake correction processing, etc.), and / or magnification processing (electronic zoom processing). In addition, the image processing unit 5061 performs detection processing on the image signal for performing AE, AF and AWB.

[0457] The image processing unit 5061 includes a processor such as a CPU and a GPU, which operates according to a predetermined program to perform the above-mentioned image processing and detection processing. In addition, when the image processing unit 5061 is composed of multiple GPUs, the image processing unit 5061 appropriately divides the information related to the image signal and uses these multiple GPUs to perform image processing in parallel.

[0458] The control unit 5063 performs various controls related to the imaging of the surgical part by the endoscope 5001 and the display of the imaging image. For example, the control unit 5063 generates a control signal for controlling the driving of the camera head 5005. At this time, when the imaging conditions are input by the user, the control unit 5063 generates a control signal according to the input by the user. Alternatively, when the endoscope 5001 is equipped with an AE function, an AF function, and an AWB function, the control unit 5063 appropriately calculates the optimal exposure value, focal length, and white balance according to the result of the detection processing performed by the image processing unit 5061, and generates a control signal.

[0459] In addition, the control unit 5063 displays the image of the surgical part on the display device 5041 based on the image signal after image processing by the image processing unit 5061. At this time, the control unit 5063 uses various image recognition technologies to recognize various objects in the surgical part image. For example, the control unit 5063 can recognize surgical tools such as forceps, specific biological parts, bleeding, and mist when the energy treatment tool 5021 is used by detecting the shape and color of the edges of the objects contained in the surgical part image. When the control unit 5063 displays the image of the surgical part on the display device 5041, it uses its recognition result to overlap various surgical support information on the image of the surgical part. By overlapping and displaying the surgical support information and prompting the surgeon 5067, the operation can be carried out more safely and reliably.

[0460] The transmission cable 5065 connecting the camera head 5005 and the CCU 5039 is an electric signal cable for communication of electric signals, an optical fiber for optical communication, or a composite cable thereof.

[0461] Here, in the example shown in the figure, communication is performed by wire using the transmission cable 5065, but communication between the camera head 5005 and the CCU 5039 may be performed wirelessly. When the communication between the two is performed wirelessly, it is not necessary to lay the transmission cable 5065 in the operating room, so the movement of medical staff in the operating room is not hindered by the transmission cable 5065.

[0462] An example of an endoscopic surgery system 5000 to which the technology of the present disclosure can be applied is described above. In addition, here, the endoscopic surgery system 5000 is described as an example, but the system to which the technology of the present disclosure can be applied is not limited to this example. For example, the technology of the present disclosure can also be applied to a soft endoscope system for inspection and a microscope surgery system.

[0463] The technology of the present disclosure can be suitably applied to the camera head 5005 in the above-described structure. In particular, the optical system of the present disclosure can be suitably applied to the lens unit 5007 of the camera head 5005.

[0464] <6. Other Implementation Methods>

[0465] The technology disclosed herein is not limited to the above-described one embodiment and examples, and can be implemented in various modified forms.

[0466] For example, the shapes and numerical values ​​of the parts shown in the above-mentioned embodiments are merely examples for implementing the present technology, and the technical scope of the present technology is not to be interpreted limitatively by them.

[0467] Furthermore, in the above-mentioned one embodiment and the example, a configuration substantially including three lens groups has been described, but a configuration further including lenses having substantially no refractive power may also be possible.

[0468] In addition, for example, the present technology can adopt the following structure.

[0469] According to the present technology having the following structure, three lens groups are included as a whole, and the structure of each lens group is optimized, so that a lightweight optical system and an imaging device with excellent swingability and high optical performance of the entire screen can be realized. [1]

[0471] An optical system, comprising, from the object side to the image side:

[0472] The first lens group has a positive refractive power as a whole, and the whole group is fixed relative to the image plane during focusing;

[0473] The second lens group has positive or negative refractive power as a whole, and the whole group moves in the optical axis direction to perform focusing from infinity to a short distance; and

[0474] The third lens group is divided into a 3a group, a 3b group, and a 3c group in order from the object side to the image plane side. The 3b group moves in a direction substantially perpendicular to the optical axis to correct image jitter. The group as a whole has negative or positive refractive power. The group as a whole is fixed relative to the image plane during focusing.

[0475] The optical system satisfies the following conditional expression.

[0476] L / f<1……(1)

[0477] D_g1max / f>0.23……(2)

[0478] D_3bImg / f<0.24……(3)

[0479] in,

[0480] L: The distance from the surface of the first lens group closest to the object to the image plane

[0481] f: The focal distance of the entire system when infinity is in focus

[0482] D_g1max: The maximum air gap on the optical axis within the first lens group

[0483] D_3bImg: The distance from the surface closest to the object side of the 3b group to the image plane. [2]

[0485] According to the optical system described in [1] above,

[0486] The first lens group includes at least one positive lens satisfying the following conditional expressions (4) and (5).

[0487] νd_1p>90……(4)

[0488] θgF_1p-(-0.001801*νd_1p+0.648262)>0.04……(5)

[0489] in,

[0490] νd_1p: Abbe value of the positive lens in the first lens group with respect to the d-line

[0491] θgF_1p: partial dispersion ratio of the g-line and the F-line of the positive lens in the first lens group. [3]

[0493] An optical system according to [1] or [2], wherein:

[0494] The 3c group includes at least one negative lens satisfying the following conditional expression (6).

[0495] θgF_3cn-(-0.001801*νd_3cn+0.648262)>0.008……(6)

[0496] in,

[0497] θgF_3cn: partial dispersion ratio of the g-line and F-line of the negative lens in the 3c group

[0498] νd_3cn: Abbe value of the negative lens in the 3c group relative to the d-line. [4]

[0500] An optical system according to any one of [1] to [3] above, wherein:

[0501] The 3c group includes at least one negative lens satisfying the following conditional expression (7).

[0502] νd_3cn<31……(7)

[0503] in,

[0504] νd_3cn: Abbe value of the negative lens in the 3c group relative to the d-line. [5]

[0506] An optical system according to any one of [1] to [4] above, wherein:

[0507] The 3c group includes at least one negative lens satisfying the following conditional expression (8).

[0508] 0<|f3cn / f|<0.15……(8)

[0509] in,

[0510] f3cn: focal length of the negative lens in the 3c group

[0511] f: The focal distance of the entire system when in focus at infinity. [6]

[0513] An optical system according to [1] or [2], wherein:

[0514] The 3c group includes at least one negative lens satisfying any of the following conditional expressions (6), (7), and (8) and conditional expression (9).

[0515] θgF_3cn-(-0.001801*νd_3cn+0.648262)>0.008……(6)

[0516] νd_3cn<31……(7)

[0517] 0<|f3cn / f|<0.15……(8)

[0518] D_3cnImg / f<0.15……(9)

[0519] in,

[0520] θgF_3cn: partial dispersion ratio of the g-line and F-line of the negative lens in the 3c group

[0521] νd_3cn: Abbe value of the negative lens in the 3c group with respect to the d-line

[0522] f3cn: focal length of the negative lens in the 3c group

[0523] f: The focal distance of the entire system when infinity is in focus

[0524] D_3cnImg: the distance between the object-side surface vertex of the negative lens in the 3c group and the image plane. [7]

[0526] An optical system according to any one of [1] to [6] above, wherein:

[0527] The first lens group includes at least one negative lens satisfying the following conditional expressions (10) and (11).

[0528] νd_1n<35……(10)

[0529] θgF_1n-(-0.001801*νd_1n+0.648262)<0.010……(11)

[0530] in,

[0531] νd_1n: Abbe value of the negative lens in the first lens group with respect to the d-line

[0532] θgF_1n: the partial dispersion ratio of the g-line and the F-line of the negative lens in the first lens group. [8]

[0534] An optical system according to any one of [1] to [7] above, wherein:

[0535] The following conditional expressions are satisfied.

[0536] 0.05<|f3c / f|<0.3……(12)

[0537] in,

[0538] f3c: focal distance of the 3c group

[0539] f: The focal distance of the entire system when in focus at infinity. [9]

[0541] An optical system according to any one of [1] to [8] above, wherein:

[0542] The second lens group includes a cemented lens or a single lens.

[10]

[0544] An optical system according to any one of [1] to [9] above, wherein:

[0545] The second lens group as a whole has positive refractive power,

[0546] The third lens group has negative refractive power as a whole.

[11]

[0548] An optical system according to any one of [1] to [9] above, wherein:

[0549] The second lens group as a whole has a negative refractive power.

[0550] The third lens group has positive refractive power as a whole.

[12]

[0552] An optical system according to any one of [1] to [9] above, wherein:

[0553] The second lens group as a whole has a negative refractive power.

[0554] The third lens group has negative refractive power as a whole.

[13]

[0556] A camera device, comprising:

[0557] an optical system; and an imaging element that outputs an imaging signal corresponding to an optical image formed by the optical system,

[0558] The optical system includes, from the object side to the image side,

[0559] The first lens group has a positive refractive power as a whole, and the whole group is fixed relative to the image plane during focusing;

[0560] The second lens group has positive or negative refractive power as a whole, and the whole group moves in the optical axis direction to perform focusing from infinity to a short distance; and

[0561] The third lens group is divided into a 3a group, a 3b group, and a 3c group in order from the object side to the image plane side. The 3b group moves in a direction substantially perpendicular to the optical axis to correct image jitter. The group as a whole has negative or positive refractive power. The group as a whole is fixed relative to the image plane during focusing.

[0562] The optical system satisfies the following conditional expression.

[0563] L / f<1……(1)

[0564] D_g1max / f>0.23……(2)

[0565] D_3bImg / f<0.24……(3)

[0566] in,

[0567] L: The distance from the surface of the first lens group closest to the object to the image plane

[0568] f: The focal distance of the entire system when infinity is in focus

[0569] D_g1max: The maximum air gap on the optical axis within the first lens group

[0570] D_3bImg: The distance from the surface closest to the object side of the 3b group to the image plane.

[14]

[0572] An optical system according to any one of [1] to

[12] above, wherein:

[0573] The optical system further includes a lens having substantially no refractive power.

[15]

[0575] According to the camera device described in

[13] above,

[0576] The optical system further includes a lens having substantially no refractive power.

[0577] This application claims priority based on Japanese Patent Application No. 2019-104612 filed with the Japan Patent Office on June 4, 2019, the entire contents of which are incorporated herein by reference.

[0578] It should be understood that those skilled in the art can conceive of various modifications, combinations, sub-combinations and changes based on the design essentials and other main factors, and they are included in the scope of the added claims and their equivalents.

Claims

1. An optical system, comprising, from the object side to the image side: The first lens group has a positive refractive power as a whole, and the whole group is fixed relative to the image plane during focusing; The second lens group has positive or negative refractive power as a whole group, and the whole group moves in the optical axis direction to perform focusing from infinity to a short distance; as well as The third lens group is divided into a 3a group, a 3b group, and a 3c group in order from the object side to the image plane side. The 3b group moves in a direction substantially perpendicular to the optical axis to correct image jitter. The group as a whole has negative or positive refractive power. The group as a whole is fixed relative to the image plane during focusing. The optical system satisfies the following conditional expressions (1) to (3): The 3c group includes at least one negative lens satisfying the following conditional formula (6): L / f<1……(1) D_g1max / f>0.23……(2) D_3bImg / f<0.24……(3) θgF_3cn-(-0.001801*νd_3cn+0.648262)>0.008……(6) in, L: the distance from the surface of the first lens group closest to the object to the image plane, f: The focal distance of the entire system when infinity is in focus. D_g1max: the maximum air gap on the optical axis within the first lens group, D_3bImg: the distance from the surface closest to the object to the image plane of the 3b group, θgF_3cn: the partial dispersion ratio of the g-line to the F-line of the negative lens in the 3c group, νd_3cn: Abbe value of the negative lens in the 3c group relative to the d-line.

2. The optical system according to claim 1, wherein: The first lens group includes at least one positive lens satisfying the following conditional expressions (4) and (5): νd_1p>90……(4) θgF_1p-(-0.001801*νd_1p+0.648262)>0.04……(5) in, νd_1p: Abbe number of the positive lens in the first lens group with respect to the d-line, θgF_1p: partial dispersion ratio of the g-line and the F-line of the positive lens in the first lens group.

3. The optical system according to claim 1, wherein: The 3c group includes at least one negative lens satisfying the following conditional formula (7): νd_3cn<31……(7) in, νd_3cn: Abbe value of the negative lens in the 3c group relative to the d-line.

4. The optical system according to claim 1, wherein: The 3c group includes at least one negative lens satisfying the following conditional expression (8): 0<|f3cn / f|<0.15……(8) in, f3cn: focal length of the negative lens in the 3c group, f: The focal distance of the entire system when in focus at infinity.

5. The optical system according to claim 1, wherein: The 3c group includes at least one negative lens satisfying any of the following conditional expressions (7) and (8) and conditional expression (9), νd_3cn<31……(7) 0<|f3cn / f|<0.15……(8) D_3cnImg / f<0.15……(9) in, νd_3cn: Abbe value of the negative lens in the 3c group with respect to the d-line, f3cn: focal length of the negative lens in the 3c group, f: The focal distance of the entire system when infinity is in focus. D_3cnImg: the distance between the object-side surface vertex of the negative lens in the 3c group and the image plane.

6. The optical system according to claim 1, wherein: The first lens group includes at least one negative lens satisfying the following conditional expressions (10) and (11): νd_1n<35……(10) θgF_1n-(-0.001801*νd_1n+0.648262)<0.010……(11) in, νd_1n: Abbe number of the negative lens in the first lens group with respect to the d-line, θgF_1n: the partial dispersion ratio of the g-line and the F-line of the negative lens in the first lens group.

7. The optical system according to claim 1, wherein: Satisfy the following conditional expression, 0.05<|f3c / f|<0.3……(12) in, f3c: focal distance of the 3c group, f: The focal distance of the entire system when in focus at infinity.

8. The optical system according to claim 1, wherein: The second lens group includes a cemented lens or a single lens.

9. The optical system according to claim 1, wherein: The second lens group as a whole has positive refractive power, The third lens group has negative refractive power as a whole.

10. The optical system according to claim 1, wherein: The second lens group as a whole has negative refractive power, The third lens group has positive refractive power as a whole.

11. The optical system according to claim 1, wherein: The second lens group as a whole has negative refractive power, The third lens group has negative refractive power as a whole.

12. A camera device, comprising: Optical system; and an imaging element that outputs an imaging signal corresponding to an optical image formed by the optical system, The optical system includes, from the object side to the image side, The first lens group has a positive refractive power as a whole, and the whole group is fixed relative to the image plane during focusing; The second lens group has positive or negative refractive power as a whole, and the whole group moves in the optical axis direction to perform focusing from infinity to a short distance; and The third lens group is divided into a 3a group, a 3b group, and a 3c group in order from the object side to the image plane side. The 3b group moves in a direction substantially perpendicular to the optical axis to correct image jitter. The group as a whole has negative or positive refractive power. The group as a whole is fixed relative to the image plane during focusing. The optical system satisfies the following conditional expressions (1) to (3): The 3c group includes at least one negative lens satisfying the following conditional formula (6): L / f<1……(1) D_g1max / f>0.23……(2) D_3bImg / f<0.24……(3) θgF_3cn-(-0.001801*νd_3cn+0.648262)>0.008……(6) in, L: the distance from the surface of the first lens group closest to the object to the image plane, f: The focal distance of the entire system when infinity is in focus. D_g1max: the maximum air gap on the optical axis within the first lens group, D_3bImg: the distance from the surface closest to the object to the image plane of the 3b group, θgF_3cn: the partial dispersion ratio of the g-line to the F-line of the negative lens in the 3c group, νd_3cn: Abbe value of the negative lens in the 3c group relative to the d-line. 13 . The optical system according to claim 1 , further comprising a lens having substantially no refractive power.

14. The imaging device according to claim 12, further comprising a lens having substantially no refractive power.

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