JPWO2015156306A1 - Medical imaging device - Google Patents

Abstract

The medical imaging device (1) includes a cylindrical housing (4) having a connection port (10) penetrating the side surface (4c), and is accommodated in the housing (4), and collects light from the subject P. An imaging optical system (2) that emits light, two imaging elements (3) having an imaging surface on which the condensed light is imaged, and a visual observation unit (5) that is detachably attached to the connection port (10) When the visual observation unit (5) is attached to the connection port (10), the eyepiece optical system is optically connected to the imaging optical system (2) and collects light from the imaging optical system (2). (14) is satisfied, and the following expression (1) is satisfied. 120 / A <βoc <170 / A (1) where βoc is the magnification of the eyepiece optical system, βoc = 250 (mm) / focal length (mm) of the eyepiece optical system, and A Is the diagonal length (mm) of the effective imaging range of the imaging device.

Description

  The present invention relates to a medical imaging apparatus.

  In a surgical microscope that forms an optical image of a subject on an image sensor and displays the subject image on a monitor for observation, the image disappears due to a failure of an electrical component such as the image sensor or a disconnection of a signal cable during use. In order to prevent the operation from being continued, there is known a surgical microscope that includes an optical unit that can visually observe a subject and is capable of switching between image observation and visual observation of the subject. (For example, see Patent Document 1)

Japanese Patent Laid-Open No. 7-5371

  The surgical microscope described in Patent Document 1 has an optical means that enables visual observation, which is permanently installed in the main body of the surgical microscope. It becomes difficult to handle when the cable is not disconnected.

  The present invention has been made in view of the above-described circumstances, and is a medical imaging apparatus that displays and observes a subject image on a monitor. The medical imaging apparatus main body in a normal state is kept small and light, and further visually By reducing the size and weight of the optical means that enables observation, the weight balance is less likely to be lost when connected to the medical imaging device body, and the operability is well balanced. An imaging device is provided.

One embodiment of the present invention includes a housing having a connection port that is formed in a cylindrical shape and penetrates a side surface, an imaging optical system that is housed in the housing and collects light from a subject, and the imaging optical system. Two imaging devices having an imaging surface on which the condensed light is imaged, and a visual observation unit that is detachably attached to the connection port of the housing, the visual observation unit comprising the visual observation unit Is attached to the connection port and is optically connected to the imaging optical system, and includes an eyepiece optical system that collects light from the imaging optical system, and satisfies the following formula (1) An imaging device.
120 / A <βoc <170 / A (1)
here,
βoc is the magnification of the eyepiece optical system, βoc = 250 (mm) / focal length (mm) of the eyepiece optical system,
A is the diagonal length (mm) of the effective imaging range of the imaging device.

  According to this aspect, when the visual observation unit is attached to the connection port, the focal length of the eyepiece optical system may become too short when the magnification of the eyepiece optical system satisfies the condition of the above formula (1). Absent. Thereby, even if the observer who carries out visual observation wears spectacles, it can prevent that spectacles contact an eyepiece optical system in the focus position.

  Since the magnification of the eyepiece optical system does not become too low, the optical system portion other than the eyepiece optical system can be prevented from becoming large and heavy in order to compensate for the magnification of the eyepiece optical system that has become too low. Thereby, even when the medical imaging apparatus is held by an arm with a balancer, the visual observation unit does not become heavy. As a result, it is possible to prevent inconvenience that the observation position cannot be held stably because it cannot be held by the arm or the weight balance of the medical imaging apparatus is lost, and the observation position can be held stably. it can.

In a state where the visual observation unit in the normal state is removed from the connection port, the medical imaging device becomes lighter and the observer can easily move the medical imaging device.
That is, it is possible to maintain a favorable observation environment when the visual observation unit is attached to the connection port and the subject is visually observed while improving the operability when the subject is displayed on the monitor and observed.

In the above aspect, the imaging optical system may include a zoom optical system capable of continuously changing a magnification, and the connection port may be provided in the vicinity of an optical path between the zoom optical system and the imaging element. Good.
In this way, when the visual observation unit is attached to the connection port, the light through the zoom optical system is incident on the visual observation optical system, so the magnification function is utilized even in the case of visual observation. be able to.

  In the above aspect, the connection port is provided in the vicinity of the optical path between the imaging optical system and the imaging device, and the visual observation unit is attached to the connection port. An optical path deflecting element that deflects an optical path toward the eyepiece optical system, and a one-time relay optical system that collects light deflected by the optical path deflecting element and enters the eyepiece optical system may be provided.

  By doing in this way, the number of lenses in the visual observation unit can be reduced, and the visual observation unit can be reduced in size and weight. In addition, since the optical image of the subject that has been turned upside down by the imaging optical system is reversed in the one-time relay optical system, the image of the upright subject can be visually observed.

  In the above aspect, the connection port is provided in the vicinity of an optical path between the zoom optical system and the imaging optical system, and the imaging optical system is mounted when the visual observation unit is attached to the connection port. An optical path deflecting element that deflects the optical path toward the eyepiece optical system, an imaging optical system for visual observation that forms an image of light deflected by the optical path deflecting element, and an image formed by the imaging optical system for visual observation And an erecting optical system that inverts the incident optical image and makes it incident on the eyepiece optical system.

  By doing in this way, the number of lenses in the visual observation unit can be reduced, and the visual observation unit can be further reduced in size and weight. Further, the cost can be reduced.

  According to the present invention, it is possible to maintain a good observation environment when a visual observation unit is attached to a connection port to visually observe a subject while improving operability when displayed on a monitor and observing the subject. Can do.

1 is an overall schematic diagram of a medical imaging apparatus according to a first embodiment of the present invention. It is a whole schematic diagram of the medical imaging device concerning a 2nd embodiment of the present invention. It is a longitudinal cross-sectional view at the time of seeing the housing | casing of the medical imaging device of FIG. 2 from the front direction. It is a longitudinal cross-sectional view at the time of seeing the housing | casing of the medical imaging device of FIG. 2 from the side surface direction. It is a longitudinal cross-sectional view at the time of seeing the visual observation unit of the medical imaging device of FIG. 2 from the side surface direction. It is a longitudinal cross-sectional view at the time of seeing the state where the visual observation unit was attached to the housing | casing of the medical imaging device of FIG. 2 from the side surface direction. It is a longitudinal cross-sectional view at the time of seeing the housing | casing of the medical imaging device which concerns on the 3rd Embodiment of this invention from a front direction. It is a longitudinal cross-sectional view at the time of seeing the housing | casing of the medical imaging device of FIG. 7 from the side surface direction. It is a longitudinal cross-sectional view when the visual observation unit of the medical imaging device which concerns on the 3rd Embodiment of this invention is seen from the side surface direction. It is a longitudinal cross-sectional view at the time of seeing the state where the visual observation unit was attached to the housing | casing of the medical imaging device of FIG. 7 from the side surface direction.

A medical imaging apparatus 1 according to a first embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the medical imaging apparatus 1 according to the present embodiment is focused by an imaging optical system 2 that collects light from a subject P (for example, an operation site) and the imaging optical system 2. Two image pickup devices 3 for picking up the collected light, a case 4 for housing the image pickup device 3 and the image pickup optical system 2, a visual observation unit 5 detachable from the case 4, and a case 4 at a desired position. And a holding mechanism 6 for holding.

The imaging optical system 2 has two optical paths, and an objective optical system (for example, an objective lens) 7 that condenses the light from the subject P on each optical path, and is condensed by the objective optical system 7. Two sets of imaging optical systems 9 for imaging light are provided.
The objective optical system 7 is disposed in the vicinity of the lower end 4a of the housing 4 and is provided to face the subject P disposed below.

The two sets of the imaging optical system 9 include a plurality of lenses arranged at intervals in the optical axis direction along optical axes X1 and X2 parallel to the optical axis of the objective optical system 7, and are collected by the objective optical system 7. The emitted light is collected and an optical image of the subject P is formed on the imaging surface of each imaging device 3.
The two image pickup devices 3 are arranged in the vicinity of the upper end 4b of the housing 4 so that the image pickup surfaces are substantially orthogonal to the optical axes X1 and X2 and the optical path lengths from the subject P are different from each other. The two image sensors 3 acquire two images with parallax by capturing an optical image of the subject P formed on the respective imaging surfaces, and monitor the acquired image information (not shown). ) Is output.

The monitor displays an image of one three-dimensional subject P generated based on the image information input from the image sensor 3.
The housing 4 is formed in a substantially cylindrical shape and has a connection port 10 penetrating the side surface 4c. The connection port 10 is provided between the imaging device 3 and the imaging optical system 9 in the axial direction.
The visual observation unit 5 includes a unit main body 13 that is detachably inserted into the connection port 10, and is accommodated in the unit main body 13, and collects light from the imaging optical system 2 when attached to the connection port 10. The visual observation optical system 12 is provided.

The visual observation optical system 12 includes a prism (optical path deflecting element) 11 that deflects light that has passed through the two optical paths of the imaging optical system 2, and an eyepiece optical system that collects the light deflected by the prism 11 (for example, , Eyepiece) 14.
The prism 11 is provided in the vicinity of one end 13 a of the unit body 13, and when the unit body 13 is attached to the connection port 10, the optical path from the imaging optical system 2 is deflected to enter the eyepiece optical system 14. .

  The unit main body 13 is attached to the housing 4 by inserting one end 13 a into the connection port 10 from the outside in the radial direction of the housing 4, and the prism 11 disposed in the vicinity of the one end 13 a is connected to the imaging optical in the housing 4. It is inserted on the optical path between the system 2 and the image sensor 3, and the image pickup optical system 3 and the eyepiece optical system 14 are optically connected.

Two eyepiece optical systems 14 are provided at predetermined intervals in the direction orthogonal to the paper surface of FIG. 1 (only one is shown in the figure), and collects the light deflected by the prism 11. Thus, two optical images are formed outside the unit main body 13.
Further, the magnification βoc and the focal length of the eyepiece optical system 14 satisfy the condition of the formula (1).

120 / A <βoc <170 / A (1)
Here, βoc is the magnification of the eyepiece optical system 14, and A is the diagonal length (unit: mm) of the effective imaging range of the imaging device 3.
The magnification βoc of the eyepiece optical system 14 can be calculated by the following equation (2).
βoc = 250 (mm) / focal length of eyepiece optical system 14 (mm) (2)

  The holding mechanism 6 includes an arm portion 15 that supports the housing 4 in a suspended state, and a gantry portion 16 that supports the arm portion 15. The arm portion 15 includes two links and a joint portion 17 that connects these links so as to be swingable. The housing 4 is suspended from the tip of one link of the arm portion 15, and a balance weight 18 is attached to the tip of the other link.

The operation of the medical imaging apparatus 1 according to this embodiment configured as described above will be described below.
To observe the subject P using the medical imaging apparatus 1 according to the present embodiment, the arm 4 is operated to position the housing 4 above the subject P, and the lower end 4a of the housing 4 is set to the subject P. Make them face each other. Thereby, the light from the subject P is condensed by the objective optical system 7 at the lower end 4 a of the housing 4.

  In a normal observation state (normal state) in which power can be supplied to the image pickup device 3, the light condensed by the objective optical system 7 without attaching the unit main body 13 to the connection port 10 is two imaging optical systems 9. As a result, an image is formed on each imaging surface of the two imaging elements 3 and photographed. Thereby, two images with parallax of the subject P are acquired. By synthesizing the acquired images and outputting them to the monitor, the observer can observe the subject P three-dimensionally using the images displayed on the monitor.

  On the other hand, the unit main body 13 is attached to the connection port 10 in an emergency in which power cannot be supplied to the image sensor 3 or when visual observation is desired. When the unit main body 13 is attached to the connection port 10, the imaging optical system 2 and the visual observation optical system 12 are optically connected by the prism 11 disposed between the imaging optical system 2 and the imaging element 3, and imaging optical The light condensed by the system 2 is incident on the visual observation optical system 12 by the prism 11. Then, when the observer looks into the unit main body 13 from the other end 13b side, the optical image of the subject P formed by the eyepiece optical system 14 can be visually observed.

  According to the medical imaging apparatus 1 according to the present embodiment configured as described above, when the visual observation unit 5 is not attached to the connection port 10, medical imaging corresponding to the components of the visual observation unit 5 is performed. An observer can move the medical imaging apparatus 1 more easily by reducing the size and weight of the apparatus 1. Thereby, operability can be improved, and there is an advantage that an image of the subject P displayed on the monitor can be observed.

  Even if power cannot be supplied to the medical imaging apparatus 1 due to cable disconnection or power failure, the unit main body 13 is attached to the connection port 10 so that the weight balance of the medical imaging apparatus 1 and the magnification of the lens can be adjusted. There is an advantage that the subject P can be visually observed while maintaining the observation environment.

  When the magnification βoc of the eyepiece optical system 14 exceeds the upper limit value of the expression (1), the magnification βoc of the eyepiece optical system 14 becomes extremely high, and the distance to the focal position where the optical image of the subject P is formed (hereinafter referred to as “the focal point position”). Simply referred to as the focal length of the eyepiece optical system 14). When the magnification βoc of the eyepiece optical system 14 exceeds the upper limit value of the formula (1), if the observer who is going to visually observe is wearing glasses, the eyeglasses are used when observing at the in-focus position. 14 makes it difficult to observe the subject P.

  On the other hand, when the magnification βoc of the eyepiece optical system 14 is less than the lower limit of the expression (1), the magnification βoc of the eyepiece optical system 14 becomes extremely low, and the focal length of the eyepiece optical system 14 becomes long. When the focal position from the eyepiece optical system 14 becomes long, it becomes difficult to specify the position where the focus is achieved.

  If the visual observation is to be easily performed when the magnification βoc of the eyepiece optical system 14 is less than the lower limit of the expression (1), it is necessary to compensate for the lowered magnification βoc of the eyepiece optical system 14, and thus visual observation is required. In the optical system 12, an optical system portion such as a lens other than the eyepiece optical system 14 becomes heavy due to an increase in the number of lenses and an increase in the size of the lens. Thereby, when the main body unit 13 is attached to the connection port 10, the holding mechanism 6 cannot hold the housing 4, or the weight balance of the medical imaging apparatus 1 is lost, and the observation position by the holding mechanism 6 Will be unstable.

  On the other hand, when it is within the range that satisfies the condition of the expression (1), there is no inconvenience as described above, and the visual observation unit 5 is attached to the connection port 10 to visually observe the subject P in a good observation environment. Can be observed.

Next, a medical imaging device 19 according to a second embodiment of the present invention will be described below with reference to the drawings.
In the description of the present embodiment, portions having the same configuration as those of the medical imaging apparatus 1 according to the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.
As shown in FIGS. 2 to 6, the medical imaging apparatus 19 according to the present embodiment has two sets of zoom optical systems 8 in which the imaging optical system 2 can continuously change the magnification, and the connection port 10. Is provided in the vicinity of the optical path between the imaging device 3 and the imaging optical system 9, and the visual observation optical system 22 of the visual observation unit 21 is different in that it includes the relay optical system 23 once.

As shown in FIG. 2, the two sets of zoom optical systems 8 are configured to change the magnification (for example, 20 times or 25 times) of the optical image obtained by the light condensed by the objective optical system 7.
The one-time relay optical system 23 is provided in front of the eyepiece optical system 14 and includes a plurality of lenses and a mirror.

  The one-time relay optical system 23 is arranged in the condensed light flux of the imaging optical system 2 and condenses the light incident from the prism 11 by a plurality of lenses, and inverts the optical image of the subject P using a mirror. The light beam in an erect image state is incident on the eyepiece optical system 14.

The operation of the medical imaging device 19 according to this embodiment configured as described above will be described below.
In a normal state, the light collected by the objective optical system 7 is incident on two sets of zoom optical systems 8, and each optical image is enlarged or reduced by a magnification (magnification change) function of the zoom optical system 8. . Then, the enlarged or reduced optical image is imaged on the imaging surfaces of the two imaging elements 3 by the imaging optical system 9, whereby two images with parallax of the subject P are acquired. Thereby, the observer can observe the subject P in a three-dimensional manner using the enlarged image or the reduced image displayed on the monitor.

  On the other hand, when visual observation is desired, when the unit main body 13 is attached to the connection port 10, the imaging optical system 2 is condensed by the prism 11 inserted between the imaging optical system 9 and the imaging element 3. Light enters the visual observation optical system 22. Then, the optical image is inverted by the relay optical system 23 once and incident on the eyepiece optical system 14 so that the optical image of the erect image subject P enlarged or reduced by the zoom optical system 8 is visually observed. can do.

In this case, the number of lenses of the visual observation optical system 22 can be reduced, and the visual observation unit 21 can be reduced in size and weight. Further, since the optical image of the subject P that has become an inverted image in the condensed light flux of the imaging optical system 2 is reversed in the one-time relay optical system 23, the image of the subject P that is an erect image can be visually observed.
In this case, when the visual observation unit 21 is attached to the connection port 10, light is incident on the visual observation optical system 22 of the visual observation unit 21 through the zoom optical system 8. There is also an advantage that the zooming function can be utilized.

Next, examples of the medical imaging device 19 according to the present embodiment will be described below with reference to FIGS. 3 to 5 and lens data.
As shown in FIGS. 3 and 4, the medical imaging apparatus 19 according to the present embodiment includes an objective optical system 7, two sets of zoom optical systems 8, and two sets of connections in the housing 4 in order from the object side. An image optical system 9 and two image pickup devices 3 are provided, and a connection port 10 is disposed between the image forming optical system 9 and the image pickup device 3. Further, as shown in FIG. 5, a visual observation unit 21 that is detachably inserted into the connection port 10 is provided. The visual observation unit 21 includes a prism 11, a one-time relay optical system 23, and two sets of an eyepiece optical system 14 in order from the object side.

  The following lens data shows the lens data of the medical imaging device 19 in a state where the visual observation unit 21 is not attached, as shown in FIGS. 3 and 4, where r is a radius of curvature (mm), and d is The surface spacing (mm), Nd is the refractive index with respect to the d-line, and ν is the Abbe number. OBJ indicates a subject (object) P, and IMA indicates an imaging surface.

Surface number r d Nd ν
OBJ ∞ 300
1 ∞ 2.798
2 −80.187 4.5 1.720000 43.689812
3 65.48 5.5 1.846660 23.777940
4 319.956 12.98383
5 303.442 4.6 1.846660 23.777940
6 105.391 7.5 1.496999 81.545888
7 −121.068 1.000001
8 395.106 4.7 1.517417 52.430903
9 −105.666 9.41771
10 ∞ 3.969
11 66.506 2 1.438750 94.946025
12 ∞ 0.3
13 36.841 2.8 1.496999 81.545888
14 −36.841 1.7 1.850259 32.2701
15 −70.873 1.497
16 −81.363 1.8 1.698947 30.127865
17 −16.254 1.1 1.754998 52.321434
18 16.254 1.741065
19 −36.342 1.1 1.701536 41.239440
20 11.913 2.2 1.850259 32.270120
21 ∞ 39.893
22 77.747 1.5 1.701536 41.239440
23 36.015 2.7 1.496999 81.545888
24 −57.889 0.3
25 29.81 2.4 1.754998 52.321434
26 ∞ 1.5 1.582673 46.423175
27 24.186 2.5
STO ∞ 20
29 74.00579 2.5 1.701536 41.239440
30 ∞ 0.5
31 29.96741 3 1.496999 81.545888
32 ∞ 2 1.749504 35.332480
33 39.12412 50.29199
34 56.99495 2.5 1.772499 49.598371
35 ∞ 17.04219
36 −31.8796 2.5 1.595509 39.242273
37 ∞ 15.98588
38 ∞ 0.0002435424
IMA ∞

  The following lens data shows lens data in a state where the visual observation unit 21 is connected to the connection port 10 as shown in FIG. The surface number 38 is the imaging optical system 2, and the surface number 39 and later are the visual observation optical system 22.

Surface number r d Nd ν
OBJ ∞ 300
1 ∞ 2.798
2 −80.187 4.5 1.720000 43.689812
3 65.48 5.5 1.846660 23.777940
4 319.956 12.98383
5 303.442 4.6 1.846660 23.777940
6 105.391 7.5 1.496999 81.545888
7 −121.068 1.000001
8 395.106 4.7 1.517417 52.430903
9 −105.666 9.41771
10 ∞ 3.969
11 66.506 2 1.438750 94.946025
12 ∞ 0.3
13 36.841 2.8 1.496999 81.545888
14 −36.841 1.7 1.850259 32.270120
15 −70.873 1.497
16 −81.363 1.8 1.698947 30.127865
17 −16.254 1.1 1.754998 52.321434
18 16.254 1.741065
19 −36.342 1.1 1.701536 41.239440
20 11.913 2.2 1.850259 32.270120
21 ∞ 39.893
22 77.747 1.5 1.701536 41.239440
23 36.015 2.7 1.496999 81.545888
24 −57.889 0.3
25 29.81 2.4 1.754998 52.321434
26 ∞ 1.5 1.582673 46.423175
27 24.186 2.5
STO ∞ 20
29 74.00579 2.5 1.701536 41.239440
30 ∞ 0.5
31 29.96741 3 1.496999 81.545888
32 ∞ 2 1.749504 35.332480
33 39.12412 50.29199
34 56.99495 2.5 1.772499 49.598371
35 ∞ 17.04219
36 −31.8796 2.5 1.595509 39.242273
37 ∞ 7.6118
38 ∞ 10 1.568832 56.363897
39 ∞ 2
40 ∞ 7.837
41 26.243 2.7 1.729157 54.680013
42 −26.243 0.5
43 7.977 3.7 1.589130 61.135024
44 ∞ 1.3 1.672700 32.099206
45 5.445 3.3
46 −4.759 1.3 1.647689 33.792803
47 ∞ 3 1.729157 54.680013
48 −7.607 0.5
49 44.788 2 1.804000 46.570373
50 −44.788 10.682
51 ∞ 13.322
52 ∞ 2 1.729157 54.680013
53 −20.527 0.5
54 23.432 2.7 1.729157 54.680013
55 ∞ 2 1.516330 64.142022
56 15.458 4.8
57 −9.782 2 1.761821 26.517885
58 ∞ 4 1.729157 54.680013
59 −29.722 0.5
60 ∞ 3.3 1.729157 54.680013
61 -18.219 1.5
62 ∞ 15 1.568832 56.363897
63 ∞ 13
64 ∞ −11.15
65 -17.8 2.5 1.603112 60.704896
66 17.8 4.18 1.805181 25.432057
67 ∞ 19.559
68 42.963 2.44 1.846659 23.780116
69 15.618 10.1 1.487490 70.236252
70 −21.191 0.3
71 18.936 5.34 1.754998 52.321434
72 ∞ 18.92
73 ∞ −991.8842
IMA ∞

Next, a medical imaging device 24 according to a third embodiment of the present invention will be described below with reference to the drawings.
In the description of the present embodiment, portions having the same configuration as those of the medical imaging device 19 according to the second embodiment described above are denoted by the same reference numerals and description thereof is omitted.
As shown in FIGS. 7 to 10, the medical imaging apparatus 24 according to the present embodiment has a connection port 10 provided between the zoom optical system 8 and the imaging optical system 9, and visual observation. The medical imaging device 19 according to the second embodiment in that the visual observation optical system 27 of the unit 26 includes an imaging optical system (visual observation imaging optical system) 28 and an erecting optical system 29; Is different.

The imaging optical system 28 is arranged in the afocal light beam of the imaging optical system 2 and collects light from the zoom optical system 8 incident on the unit main body 13 by the prism 11 to form an intermediate image. It has become.
The erecting optical system 29 is composed of a polo mirror, and inverts the intermediate image formed by the imaging optical system 28 to form an erecting image.

The operation of the medical imaging device 24 according to this embodiment configured as described above will be described below.
When the unit main body 13 is attached to the connection port 10, the light from the zoom optical system 8 enters the unit main body 13 and is condensed by the imaging optical system 28 to form an intermediate image. The formed intermediate image is inverted by the erecting optical system 29 and is incident on the eyepiece optical system 14, whereby the optical image of the subject P of the erecting image enlarged or reduced can be visually observed.

  According to the medical imaging device 24 according to the present embodiment configured as described above, when the visual observation unit 26 is attached to the connection port 10, the light incident into the unit main body 13 is parallel light in the afocal light beam. Therefore, it is possible to reduce the number of image planes on which an optical image is formed in the visual observation unit 26. Thereby, the number of lenses in the visual observation optical system 27 can be reduced, and the visual observation unit 26 can be further reduced in size and weight. Further, the cost can be reduced by reducing and reducing the components of the visual observation unit 26 (for example, lenses, members constituting the unit main body 13 and the like).

Next, examples of the medical imaging device 24 according to the present embodiment will be described below with reference to FIGS. 7 to 10 and lens data.
As shown in FIGS. 7 and 8, the medical imaging apparatus 24 according to the present embodiment includes an objective optical system 7, two sets of zoom optical systems 8, and two sets of connections in the housing 4 in order from the object side. An image optical system 9 and two image sensors 3 are provided, and a connection port 10 is disposed between the zoom optical system 8 and the image sensor 3. Further, as shown in FIG. 9, a visual observation unit 26 that is detachably inserted into the connection port 10 is provided. The visual observation unit 26 includes a prism 11, a pair of imaging optical systems 28, a pair of erecting optical systems 29, and two sets of eyepiece optical systems 14 in order from the object side.

  The following lens data shows the lens data of the medical imaging device 24 in a state where the visual observation unit 26 is not attached, as shown in FIGS.

Surface number r d Nd ν
OBJ ∞ 225
1 ∞ 2.0985
2 −60.14025 3.375 1.720000 43.689812
3 49.11 4.125 1.846660 23.777940
4 239.967 9.737872
5 227.5815 3.45 1.846660 23.777940
6 79.04325 5.625 1.496999 81.545888
7 −90.801 0.7500007
8 296.3295 3.525 1.517417 52.430903
9 −79.2495 7.063282
10 ∞ 2.97675
11 49.8795 1.5 1.438750 94.946025
12 ∞ 0.225
13 27.63075 2.1 1.496999 81.545888
14 −27.63075 1.275 1.850259 32.270120
15 −53.15475 1.12275
16 −61.02225 1.35 1.698947 30.127865
17 -12.905 0.825 1.754998 52.321434
18 12.1905 1.305799
19 −27.2565 0.825 1.701536 41.239440
20 8.93475 1.65 1.850259 32.270120
21 ∞ 29.91975
22 58.31025 1.125 1.701536 41.239440
23 27.01125 2.025 1.496999 81.545888
24 −43.41675 0.225
25 22.3575 1.8 1.754998 52.321434
26 ∞ 1.125 1.582673 46.423175
27 18.1395 1.875
STO ∞ 15
29 55.50434 1.875 1.701536 41.239440
30 ∞ 0.375
31 22.47556 2.25 1.496999 81.545888
32 ∞ 1.5 1.749504 35.332480
33 29.34309 37.71899
34 42.74621 1.875 1.772499 49.598371
35 ∞ 12.78164
36 −23.9097 1.875 1.595509 39.242273
37 ∞ 11.98941
38 ∞ 6.848446 × 10 ^-3
IMA ∞

  The following lens data shows the lens data in a state where the visual observation unit 26 is connected to the connection port 10 as shown in FIG. The imaging optical system 2 is shown up to the surface number STO, and the visual observation optical system 27 is shown after the surface number 29.

Surface number r d Nd ν
OBJ ∞ 225
1 ∞ 2.0985
2 −60.14025 3.375 1.720000 43.689812
3 49.11 4.125 1.846660 23.777940
4 239.967 9.737872
5 227.5815 3.45 1.846660 23.777940
6 79.04325 5.625 1.496999 81.545888
7 −90.801 0.7500007
8 296.3295 3.525 1.517417 52.430903
9 −79.2495 7.063282
10 ∞ 2.97675
11 49.8795 1.5 1.438750 94.946025
12 ∞ 0.225
13 27.63075 2.1 1.496999 81.545888
14 −27.63075 1.275 1.850259 32.270120
15 −53.15475 1.12275
16 −61.02225 1.35 1.698947 30.127865
17 -12.905 0.825 1.754998 52.321434
18 12.1905 1.305799
19 −27.2565 0.825 1.701536 41.239440
20 8.93475 1.65 1.850259 32.270120
21 ∞ 29.91975
22 58.31025 1.125 1.701536 41.239440
23 27.01125 2.025 1.496999 81.545888
24 −43.41675 0.225
25 22.3575 1.8 1.754998 52.321434
26 ∞ 1.125 1.582673 46.423175
27 18.1395 1.875
STO ∞ 0
29 ∞ 2
30 ∞ 30.73 1.516330 64.142022
31 ∞ 2
32 56.60727 1.875 1.701536 41.239440
33 ∞ 0.375
34 31.90196 2.25 1.496999 81.545888
35 ∞ 1.5 1.749504 35.332480
36 37.94215 2
37 ∞ 93.591
38 ∞ −8.25
39 −13.35 1.875 1.603112 60.704896
40 13.35 3.135 1.805181 25.432057
41 ∞ 14.485
42 32.22225 1.83 1.846659 23.780116
43 11.7135 7.575 1.487490 70.236252
44 −15.89325 0.225
45 14.202 4.005 1.754998 52.321434
46 ∞ 14.5
47 ∞ −999.0014
IMA ∞

DESCRIPTION OF SYMBOLS 1, 19, 24 Medical imaging device 2 Imaging optical system 3 Imaging element 4 Housing 5, 21, 26 Visual observation unit 7 Objective optical system 8 Zoom optical system 9, 28 Imaging optical system 10 Connection port 11 Prism 14 Eyepiece optical System 23 One-time relay optical system 29 Erecting optical system

One embodiment of the present invention includes a housing having a connection port that is formed in a cylindrical shape and penetrates a side surface, an imaging optical system that is housed in the housing and collects light from a subject, and the imaging optical system. Two imaging devices having an imaging surface on which the condensed light is imaged, and a visual observation unit that is detachably attached to the connection port of the housing, the visual observation unit comprising the visual observation unit An eyepiece optical system that is optically connected to the imaging optical system and collects light from the imaging optical system when the imaging optical system is attached to the connection port, and the imaging optical system receives light from the subject An objective optical system for condensing, and an imaging optical system for forming an image of the light condensed by the objective optical system on the imaging surface of the imaging device, and the connection port includes the imaging optical system Provided in the vicinity of the optical path between the image sensor and the visual observation unit , An optical path deflecting element that deflects the optical path of the imaging optical system toward the eyepiece optical system, and the light deflected by the optical path deflecting element when being attached to the connection port. which is a medical imaging equipment and a single relay optical system to be incident on the eyepiece optical system.

According to this aspect, when fitted with a visual observation units to the connection port, is not the focal length of contact eye optical system becomes too short. Thereby, even if the observer who carries out visual observation wears spectacles, it can prevent that spectacles contact an eyepiece optical system in the focus position.

As a reference example of the present invention, the imaging optical system includes a zoom optical system capable of continuously changing a magnification, and the connection port is provided in the vicinity of an optical path between the zoom optical system and the imaging element. It may be.
In this way, when the visual observation unit is attached to the connection port, the light through the zoom optical system is incident on the visual observation optical system, so the magnification function is utilized even in the case of visual observation. be able to.

In the above aspect, the connection port is provided in the vicinity of the optical path between the imaging optical system and the imaging device, and the visual observation unit is attached to the connection port. an optical path deflecting element that deflects toward the optical path to the eyepiece optical system, that provides once a relay optical system that condenses the light deflected by the optical path deflecting element is incident on the eyepiece optical system.

As a reference example of the present invention, the connection port is provided in the vicinity of an optical path between the zoom optical system and the imaging optical system, and when the visual observation unit is attached to the connection port, An optical path deflecting element that deflects the optical path of the imaging optical system toward the eyepiece optical system, an imaging optical system for visual observation that forms an image of light deflected by the optical path deflecting element, and the imaging optical system for visual observation And an erecting optical system that inverts the optical image formed by the optical system so as to enter the eyepiece optical system.

1 is an overall schematic diagram of a medical imaging apparatus according to a first embodiment of the present invention. It is a whole schematic diagram of the medical imaging device concerning a 2nd embodiment of the present invention. It is a longitudinal cross-sectional view at the time of seeing the housing | casing of the medical imaging device of FIG. 2 from the front direction. It is a longitudinal cross-sectional view at the time of seeing the housing | casing of the medical imaging device of FIG. 2 from the side surface direction. It is a longitudinal cross-sectional view at the time of seeing the visual observation unit of the medical imaging device of FIG. 2 from the side surface direction. It is a longitudinal cross-sectional view at the time of seeing the state where the visual observation unit was attached to the housing | casing of the medical imaging device of FIG. 2 from the side surface direction. It is a longitudinal cross-sectional view when the housing | casing of the medical imaging device which concerns on reference embodiment of this invention is seen from a front direction. It is a longitudinal cross-sectional view at the time of seeing the housing | casing of the medical imaging device of FIG. 7 from the side surface direction. It is a longitudinal cross-sectional view when the visual observation unit of the medical imaging device which concerns on reference embodiment of this invention is seen from the side surface direction. It is a longitudinal cross-sectional view at the time of seeing the state where the visual observation unit was attached to the housing | casing of the medical imaging device of FIG. 7 from the side surface direction.

Next, a medical imaging device 24 according to a reference embodiment of the invention as a reference example of the present invention will be described below with reference to the drawings.
In the description of the present embodiment, portions having the same configuration as those of the medical imaging device 19 according to the second embodiment described above are denoted by the same reference numerals and description thereof is omitted.
As shown in FIGS. 7 to 10, the medical imaging apparatus 24 according to the present embodiment has a connection port 10 provided between the zoom optical system 8 and the imaging optical system 9, and visual observation. The medical imaging device 19 according to the second embodiment in that the visual observation optical system 27 of the unit 26 includes an imaging optical system (visual observation imaging optical system) 28 and an erecting optical system 29; Is different.

Claims (4)

A casing having a connection port formed in a cylindrical shape and penetrating the side surface;
An imaging optical system that is housed in the housing and collects light from the subject;
Two imaging elements having an imaging surface on which light collected by the imaging optical system is imaged;
A visual observation unit that is detachably attached to the connection port of the housing;
The visual observation unit includes an eyepiece optical system that is optically connected to the imaging optical system and collects light from the imaging optical system when the visual observation unit is attached to the connection port. A medical imaging apparatus that satisfies the formula (1).
120 / A <βoc <170 / A (1)
here,
βoc is the magnification of the eyepiece optical system, βoc = 250 (mm) / focal length (mm) of the eyepiece optical system,
A is the diagonal length (mm) of the effective imaging range of the imaging device. The imaging optical system includes a zoom optical system capable of continuously changing the magnification,
The medical imaging apparatus according to claim 1, wherein the connection port is provided in the vicinity of an optical path between the zoom optical system and the imaging element. The connection port is provided in the vicinity of an optical path between the imaging optical system and the imaging element;
When the visual observation unit is attached to the connection port, an optical path deflecting element that deflects the optical path of the imaging optical system toward the eyepiece optical system, and light deflected by the optical path deflecting element are incident, The medical imaging apparatus according to claim 2, further comprising a one-time relay optical system that causes the condensed light to enter the eyepiece optical system. The connection port is provided in the vicinity of an optical path between the zoom optical system and the imaging optical system;
When the visual observation unit is attached to the connection port, the optical path deflecting element that deflects the optical path of the imaging optical system toward the eyepiece optical system, and the light deflected by the optical path deflecting element is imaged The medical system according to claim 2, further comprising: an imaging optical system for visual observation; and an erecting optical system that inverts an optical image formed by the visual observation imaging optical system and makes it incident on the eyepiece optical system. Imaging device.

Images