WO2017006399A1

WO2017006399A1 - Light source-side connector, endoscope-side connector, and optical connector for endoscope

Info

Publication number: WO2017006399A1
Application number: PCT/JP2015/069314
Authority: WO
Inventors: 基希田端
Original assignee: オリンパス株式会社
Priority date: 2015-07-03
Filing date: 2015-07-03
Publication date: 2017-01-12
Also published as: JPWO2017006399A1

Abstract

A light source-side connector (200) has: an output unit (210), which is optically connected to an input unit (310) that is provided in an endoscope-side connector (300), and which outputs first light toward the input unit (310); and a light source-side output/input unit (220), which is optically connected to an endoscope-side output/input unit (320) that is provided in the endoscope-side connector (300), and which outputs, toward the endoscope-side output/input unit (320), second light having optical characteristics different from those of the first light, or to which the second light having been outputted from the endoscope-side output/input unit (320) is inputted. The light source-side connector (200) has a stray light prevention unit (500) that prevents the first light from entering, as stray light, from the light source-side output/input unit (220) and/or the second light from entering, as stray light, from the output unit (210) of the second light.

Description

Light source side connector, endoscope side connector, and optical connector for endoscope

The present invention relates to a light source side connector, an endoscope side connector, and an endoscope optical connector.

Recent endoscope systems have a plurality of optical fibers that guide light used in various applications such as illumination, information transmission, and treatment. The optical fiber is provided in the endoscope and the light source device of the endoscope system, and when the endoscope is connected to the light source device, the plurality of optical fibers provided in the endoscope and the plurality provided in the light source device. Optical connection with optical fiber is required. Therefore, the endoscope optical connector of the endoscope system includes a light source side connector provided in the light source device and an endoscope side connector provided in the endoscope and optically connected to the light source side connector. .

For example, the optical connector disclosed in Patent Document 1 optically connects optical fibers used for each application. That is, for example, the optical fibers for illumination are optically connected, and the optical fibers for information transmission are optically connected. Between the optical fibers, a lens for magnifying the light is disposed in order to suppress the influence of the light amount attenuation.

JP 2014-182341 A

Generally, for example, the amount of illumination light is several tens mW to several W, for example, the amount of information transmission light is several hundred μW to several mW, and the amount of illumination light is larger than the amount of information transmission light. In Patent Document 1, illumination light may be reflected or scattered by a lens and become stray light. Although stray light is a small part of the total amount of light, illumination light as stray light enters the optical fiber for information transmission light, travels through the optical fiber, and drives such as an image acquisition unit and an image processing unit for information transmission light When the light reaches the part, since the amount of light is large, the illumination light as stray light affects the driving part, and the driving part causes malfunction due to the stray light.

Specifically, a pair of optical fibers for information transmission light is provided in an endoscope, and is a first optical fiber that guides laser light obtained by converting image information acquired by an image acquisition unit into an optical signal. And a second optical fiber that is provided in the light source device and guides the laser light transmitted from the first optical fiber to the image processing unit. When the illumination light enters the first optical fiber as stray light, travels through the first optical fiber and reaches the image acquisition unit, the laser emission for converting the image information into an optical signal becomes unstable, and the quality of the optical signal Is damaged. When the illumination light enters the second optical fiber as stray light and travels through the second optical fiber to reach the image processing unit, the illumination light affects the image generated by the image processing unit as noise, and the image Quality is impaired.

Thus, when the stray light that has entered reaches the drive unit, the drive unit causes malfunction due to the stray light. Therefore, prevention of stray light intrusion is desired.

The present invention has been made in view of these circumstances, and an object thereof is to provide a light source-side connector, an endoscope-side connector, and an endoscope optical connector that can prevent the invasion of stray light.

In one aspect of the light source side connector of the present invention, the endoscope side connector provided in the endoscope is detachable, provided in the light source device, and when the endoscope side connector is connected to the light source side connector. And an endoscope that is optically connected to an incident portion provided in the endoscope-side connector and emits first light toward the incident portion, and the endoscope-side connector is connected to the light source-side connector. A first optical element that is optically connected to an endoscope side exit / incident part provided in the endoscope side connector and has optical characteristics different from the first light toward the endoscope side exit / incident part. A light source side light incident / incident part that emits two lights or the second light emitted from the endoscope side light incident / incident part, and an intrusion of the first light as stray light from the light source side light incident / incident part , At least with the intrusion from the emission part of the second light as stray light One of comprising a stray light preventing portion for preventing.

One aspect of the endoscope-side connector of the present invention is detachable from a light source-side connector provided in a light source device, provided in the endoscope, and when the endoscope-side connector is connected to the light source-side connector. And an endoscope that is optically connected to the light emitting part provided in the light source side connector and receives the first light emitted from the light emitting part, and the endoscope side connector is connected to the light source side connector. The second light having an optical characteristic different from that of the first light is optically connected to the light source side light incident / incident part provided in the light source side connector, or An endoscope side exit / incident part where the second light emitted from the light source side exit / incident part is incident; an invasion of the first light as stray light from the endoscope side exit / incident part; and the stray light as the stray light. At least with the penetration of the second light from the incident part One of comprising a stray light preventing portion for preventing.

One aspect of the optical connector for an endoscope of the present invention has a light source side connector provided in the light source device, and an endoscope side connector provided in the endoscope that is detachable from the light source side connector, The light source side connector is provided with an emission part for emitting the first light, and the endoscope side connector is provided with an optical element when the endoscope side connector is connected to the light source side connector. Are connected to each other, and the first light emitted from the light emitting part is incident on the endoscope side connector and emits second light having optical characteristics different from that of the first light. Or provided in the endoscope side exit / incident part where the second light is incident and the light source side connector, and when the endoscope side connector is connected to the light source side connector, Optically connected to the endoscope side exit / incident part A light source side light incident / incident part that emits the second light emitted or emits the second light toward the endoscope side light incident / incident part, and the light source side light incident / incident part of the first light as stray light Intrusion from the endoscope side exit / incident part of the first light as stray light, intrusion from the exit part of the second light as stray light, and the second light as stray light A stray light prevention unit for preventing at least one of intrusion from the incident unit.

According to the present invention, it is possible to provide a light source side connector, an endoscope side connector, and an endoscope optical connector that can prevent stray light from entering.

FIG. 1 is a schematic diagram of an endoscope system according to the first embodiment of the present invention. FIG. 2A is a diagram illustrating a configuration of an optical connector in which the first connector is separated from the second connector, and the stray light preventing unit functions as the first and second parallel units and the first and second light collecting units. FIG. 2B is a view of the second connector viewed from the arrow 2B shown in FIG. 2A. FIG. 2C is a schematic view of an optical connector in which the first connector shown in FIG. 2A is connected to the second connector. FIG. 2D is a diagram illustrating a configuration of an optical connector in which the first connector is separated from the second connector, and the stray light prevention unit functions as a cover unit. FIG. 2E is a diagram illustrating a configuration of an optical connector in which the first connector is separated from the second connector, and the stray light preventing unit functions as a first emitting unit, a first incident unit, a second emitting unit, and a second incident unit. is there. FIG. 3A is a diagram showing that the transmittance for image information light is high and the transmittance for illumination light is low in the wavelength selectivity of the stray light prevention unit. FIG. 3B is a diagram showing that the transmittance for image information light is low and the transmittance for illumination light is high in the wavelength selectivity of the stray light prevention unit. FIG. 4 is a schematic diagram of an endoscope system according to

Modifications

1, 2, and 3 of the first embodiment. FIG. 5A is a schematic diagram of an optical connector in which the first connector in Modifications 1 and 3 is connected to the second connector. FIG. 5B is a diagram illustrating that in the wavelength selectivity of the stray light prevention unit of the first modification, the transmittance for image information light is high, and the transmittance for illumination light or treatment light for photodynamic therapy is low. FIG. 5C is a diagram illustrating that in the wavelength selectivity of the stray light prevention unit of the first modification, the transmittance for image information light is high and the transmittance for illumination light or treatment light for incision or hemostasis is low. FIG. 5D is a diagram showing that the transmittance for image information light is low and the transmittance for illumination light or treatment light for photodynamic treatment is high in the wavelength selectivity of the stray light prevention unit of the first modification. FIG. 5E is a diagram showing that the transmittance for image information light is low and the transmittance for illumination light or treatment light for incision or hemostasis is high in the wavelength selectivity of the stray light prevention unit of the first modification. FIG. 6A is a schematic diagram of an optical connector in which the first connector in Modification 2 is connected to the second connector. FIG. 6B is a diagram showing that in the wavelength selectivity of the stray light prevention unit of the second modification, the transmittance for illumination light is high and the transmittance for treatment light for photodynamic treatment is low. FIG. 6C is a diagram illustrating that in the wavelength selectivity of the stray light prevention unit of the second modification, the transmittance for illumination light is high and the transmittance for treatment light for incision or hemostasis is low. FIG. 6D is a diagram showing that in the wavelength selectivity of the stray light prevention unit of the second modification, the transmittance for illumination light is low and the transmittance for treatment light for photodynamic treatment is high. FIG. 6E is a diagram showing that the transmittance for illumination light is low and the transmittance for treatment light for incision or hemostasis is high in the wavelength selectivity of the stray light prevention unit of the second modification. FIG. 7A is a diagram showing that the transmittance for image information light is high and the transmittance for illumination light and treatment light for photodynamic treatment is low in the wavelength selectivity of the stray light prevention unit of Modification 3. . FIG. 7B is a diagram showing that the transmittance for illumination light is high and the transmittance for image information light and treatment light for photodynamic treatment is low in the wavelength selectivity of the stray light prevention unit of Modification 3. . FIG. 7C is a diagram showing that in the wavelength selectivity of the stray light prevention unit of Modification 3, the transmittance for the treatment light for photodynamic treatment is high and the transmittance for the image information light and the illumination light is low. . FIG. 7D is a diagram illustrating that in the wavelength selectivity of the stray light prevention unit of the third modification, the transmittance for image information light is high and the transmittance for illumination light and treatment light for incision or hemostasis is low. FIG. 7E is a diagram showing that the transmittance for illumination light is high and the transmittance for image information light and treatment light for incision or hemostasis is low in the wavelength selectivity of the stray light prevention unit of the third modification. FIG. 7F is a diagram illustrating that in the wavelength selectivity of the stray light prevention unit of the third modification, the transmittance for the treatment light for incision or hemostasis is high and the transmittance for the image information light and the illumination light is low. FIG. 8A is a diagram illustrating a configuration of an optical connector in which the first connector according to the second embodiment of the present invention is separated from the second connector, and the stray light prevention unit functions as a wall. FIG. 8B is a view of the second connector viewed from the arrow 8B shown in FIG. 8A. FIG. 8C is a schematic view of an optical connector in which the first connector shown in FIG. 8A is connected to the second connector.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that in some drawings, illustration of some of the members is omitted for clarity of illustration.

[First Embodiment]
[Constitution]
The first embodiment will be described with reference to FIGS. 1, 2A, 2B, 2C, 2D, 2E, 3A, and 3B. For clarity of illustration, the optical connector 100 is simplified in FIG.
[Endoscope system 10]
As shown in FIG. 1, the endoscope system 10 includes an endoscope 20 and a light source device 30 to which the endoscope 20 is detachably connected. The endoscope system 10 includes an illumination unit 50 that illuminates the subject 11 with illumination light IL, and an imaging unit 70 that captures the reflected light RL reflected by the subject 11 illuminated with the illumination light IL. The endoscope system 10 includes a control unit 81 that controls the illumination unit 50 and the imaging unit 70, an input unit 83 that inputs an instruction to start operations of the illumination unit 50 and the imaging unit 70, and an imaging unit 70 that captures an image. And a display unit 85 that displays the reflected light RL as an image. The endoscope system 10 includes an endoscope optical connector (hereinafter referred to as an optical connector 100).

[Endoscope 20 and light source device 30]
The endoscope 20 has a universal cord provided in the endoscope 20. As shown in FIGS. 2A and 2C, the endoscope 20 is connected to the light source device 30 when the connecting portion 21 of the universal cord is inserted and connected to the connection port portion 31 of the light source device 30. As shown in FIG. 2C, when the connecting portion 21 is inserted into the connecting port portion 31, most of the outer peripheral surface of the connecting portion 21 is in close contact with most of the inner peripheral surface of the connecting port portion 31. The front end surface of this is not in contact with the bottom surface of the connection port 31. A space 40 is formed between the distal end surface of the connection portion 21 and the bottom surface of the connection port portion 31.

2A and 2C, the outer peripheral surface of the connection portion 21 and the inner peripheral surface of the connection port portion 31 are provided with a pair of electrical contact portions 41 that also serve as positioning portions for connection. When the connection part 21 is inserted into the connection port part 31, the electrical contact parts 41 are connected to each other. With this connection, an image acquisition unit 71 described later of the imaging unit 70 is electrically connected to the control unit 81.

[Lighting unit 50]
As shown in FIG. 1, the illumination unit 50 includes a light source unit 51,

light guide members

53 and 55, and an illumination unit 57. The light source unit 51 and the light guide member 53 are provided in the light source device 30, and the light guide member 55 and the illumination unit 57 are provided in the endoscope 20.

[Light source unit 51]
The light source unit 51 includes

light source parts

51a, 51b, 51c, a light guide member 51d, and a multiplexing part 51f.

The light source unit 51a includes, for example, a laser diode that emits blue laser light. The center wavelength of the laser light is, for example, 445 nm.
The light source unit 51b includes a laser diode that emits green laser light, for example. The center wavelength of the laser light is, for example, 532 nm.
The light source unit 51c includes, for example, a laser diode that emits red laser light. The center wavelength of the laser light is, for example, 635 nm.
The number of outputs of the

light sources

51a, 51b, 51c is 10 mW to several W.

The light guide member 51d is, for example, a single optical fiber. The light guide member 51d is optically connected to each of the

light source units

51a, 51b, 51c and the combining unit 51f, and guides the laser light emitted from the

light source units

51a, 51b, 51c to the combining unit 51f. To do.

The multiplexing unit 51 f multiplexes the laser light guided by the light guide member 51 d and causes the laser light to enter the light guide member 53.

[Light guide members 53 and 55]
The

light guide members

53 and 55 are single-line optical fibers. As shown in FIGS. 2A and 2C, the light guide member 53 is optically connected to the light guide member 55 by the optical connector 100. The

light guide members

53 and 55 guide laser light from the light source unit 51 to the illumination unit 57.

[Lighting part 57]
The illumination unit 57 is provided at the distal end of the insertion unit of the endoscope 20. The illumination unit 57 converts the optical characteristics of the laser light to generate illumination light IL, and emits the illumination light IL toward the subject 11. The illumination unit 57 includes, for example, a diffusing member, and expands the light distribution characteristic of the laser light by the diffusing member. The illumination unit 57 emits secondary light having an enlarged light distribution characteristic as illumination light IL. In the following, for convenience, laser light traveling from the light source unit 51 to the illumination unit 57 is also described as illumination light IL.

[Imaging unit 70]
The imaging unit 70 acquires image information, which is information based on the reflected light RL, and displays it on the display unit 85. As illustrated in FIG. 1, the imaging unit 70 includes an image acquisition unit 71,

light guide members

73 and 75, and an image processing unit 77. The image acquisition unit 71 and the light guide member 73 are provided in the endoscope 20, and the light guide member 75 and the image processing unit 77 are provided in the light source device 30.

The imaging unit 70 is an example of an information transmission unit that transmits information as an optical signal. The information optically transmitted by the information transmission unit is not limited to image information handled in the imaging unit 70, for example, and may be other information. For example, such an information transmission unit is provided in the endoscope 20 and includes a fiber sensor that detects the bending of the insertion portion of the endoscope 20. The amount of light used for the information transmission unit is relatively smaller than the amount of illumination light IL used for the illumination unit 50.

[Image acquisition unit 71]
The image acquisition unit 71 is provided at the distal end of the insertion unit of the endoscope 20. The image acquisition unit 71 is disposed next to the illumination unit 57. The image acquisition unit 71 captures the reflected light RL, generates an electrical signal as image information, converts the electrical signal generated by the imaging unit 71a into an optical signal, and emits the optical signal. A conversion unit 71b. The imaging unit 71a includes, for example, an imaging optical system and an imaging element such as a CCD. The conversion unit 71 b includes a laser diode that is an emission unit that converts an electric signal into laser light and emits the laser light, and a condensing unit that condenses the laser light on the light guide member 73. The center wavelength of the laser light is, for example, 850 nm. The number of outputs of the emitting part is 100 μW to several mW. The laser light corresponds to the image information, and is hereinafter referred to as image information light DL. The image information light DL is an example of light transmitted by the information transmission unit (hereinafter, information transmission light).

[Light guide members 73 and 75]
The

light guide members

73 and 75 are single-line optical fibers. As shown in FIGS. 2A and 2C, the light guide member 73 is optically connected to the light guide member 75 by the optical connector 100. The

light guide members

73 and 75 guide the image information light DL from the image acquisition unit 71 to the image processing unit 77.

[Image processing unit 77]
The image processing unit 77 includes a conversion unit 77a that receives the laser light that is the image information light DL, converts the laser light into an electrical signal that represents the original image information, and a processing unit 77b that processes the electrical signal. The electrical signal processed by the processing unit 77 b is displayed as an image on the display unit 85 that is electrically connected to the light source device 30.

[Contrast between Illumination Unit 50 and Imaging Unit 70]
The

light guide members

53 and 55 are used for transmission of illumination light IL, and the

light guide members

73 and 75 are used for transmission of image information light DL. The

light guide members

53 and 55 are of a different system from the

light guide members

73 and 75. The

light guide members

53 and 55 have the same optical function as light guide together with the

light guide members

73 and 75, but are different from the

light guide members

73 and 75.

In this embodiment, let us focus on the illumination unit 50 and the imaging unit 70. In this case, if the illumination unit 50 is defined as a part for the first application, the illumination light IL is defined as the first light. The imaging unit 70 is defined as a part for a second application different from the first application, and the image information light DL is defined as a second light having optical characteristics different from the optical characteristics of the illumination light IL that is the first light. Is done. That is, the first light is used for illumination, and the second light is used for information transmission.

The first light amount of the illumination light IL that is the first light is larger than the second light amount of the image information light DL that is the second light, and is 10 times or more the second light amount.

[Control unit 81, input unit 83, and display unit 85]
As shown in FIG. 1, the control unit 81 is provided in the light source device 30. The control unit 81 controls the

light source units

51 a, 51 b, 51 c, the image acquisition unit 71, and the image processing unit 77 based on an instruction input from the input unit 83 that is electrically connected to the control unit 81. The control unit 81 controls the light amounts of the

light source units

51a, 51b, and 51c, for example. Thereby, the illumination light IL having a desired color is generated.

The input unit 83 is a switch, for example, and the display unit 85 is a monitor. The input unit 83 and the display unit 85 are separate from the light source device 30 and the endoscope 20. The input unit 83 inputs a light amount ratio, for example.

[Optical connector 100]
As shown in FIGS. 2A and 2C, the optical connector 100 is detachably attached to the light source side connector (hereinafter referred to as the first connector 200) provided in the connection port portion 31 of the light source device 30 and the first connector 200. And an endoscope-side connector (hereinafter referred to as a second connector 300) provided in the connecting portion 21 of the endoscope 20.

The first connector 200 includes an emitting part 210 and a light source side incident / incident part (hereinafter referred to as a first incident / incident part 220).
The second connector 300 includes an incident portion 310 and an endoscope side exit / incident portion (hereinafter referred to as a second exit / incident portion 320).
The emission part 210 and the incident part 310 are provided coaxially and are used for the first application (illumination light IL).
The first exit / incident section 220 and the second exit / incident section 320 are provided on the same axis and are used for the second application (image information light DL).
The emission part 210 and the first emission / incidence part 220 are provided, for example, on the same circle around the central axis of the first connector 200.
The incident part 310 and the second exit / incident part 320 are provided on the same circle with the central axis of the second connector 300 as the center, for example.

The emission unit 210 and the incident unit 310 are different systems from the first output / incident unit 220 and the second output / incident unit 320, and are different parts. As described above, the optical connector 100 is provided for each use, and has a plurality of different ports depending on the use. In the present embodiment, for example, two ports are provided for the illumination light IL and the image information light DL.

In the present embodiment, the emission unit 210 is optically connected to the light guide member 53, and the illumination light IL is guided by the light guide member 53. The emitting unit 210 is optically connected to the incident unit 310 when the second connector 300 is connected to the second connector 200, and emits the illumination light IL toward the incident unit 310. When the second connector 300 is connected to the second connector 200, the illumination light IL emitted from the emission unit 210 is incident on the incident unit 310. The incident part 310 is optically connected to the light guide member 55, and the illumination light IL incident on the incident part 310 is guided to the illumination part 57 by the light guide member 55.

The emitting unit 210 converts the illumination light IL emitted from the end of the light guide member 53 from which the illumination light IL is emitted (hereinafter referred to as the first emitting unit 211) and the first emitting unit 211 into parallel light. And a first parallel part 213. The incident unit 310 includes a first light collecting unit 311 that collects parallel light and an end of the light guide member 55 on which the illumination light IL collected by the first light collecting unit 311 is incident (hereinafter referred to as a first incident unit). 313). The first emitting portion 211, the first parallel portion 213, the first condensing portion 311 and the first incident portion 313 are provided on the same axis. The first emitting part 211 and the first parallel part 213 are provided in the connection port part 31, and the first light collecting part 311 and the first incident part 313 are provided in the connection part 21. The first parallel part 213 is, for example, a transparent collimator lens, and the first light collecting part 311 is, for example, a transparent light collecting lens.

In the present embodiment, the second light incident / incident unit 320 is optically connected to the light guide member 73, and the image information light DL is guided by the light guide member 73. The second exit / incident unit 320 is optically connected to the first exit / incident unit 220 when the second connector 300 is connected to the second connector 200, and the image information light DL is directed toward the first exit / incident unit 220. Is emitted. When the second connector 300 is connected to the second connector 200, the image information light DL emitted from the second exit / incident portion 320 is incident on the first exit / incident portion 220. The first light incident / incident unit 220 is optically connected to the light guide member 75, and the image information light DL incident on the first light incident / incident unit 220 is guided to the image processing unit 77 by the light guide member 75.

The second exit / incident part 320 receives the image information light DL emitted from the end of the light guide member 73 from which the image information light DL is emitted (hereinafter referred to as the second exit part 321) and the second exit part 321. And a second parallel portion 323 that converts the light into parallel light. The first light incident / incident unit 220 includes a second light collecting unit 221 that collects parallel light and an end of the light guide member 75 on which the image information light DL collected by the second light collecting unit 221 is incident (hereinafter, A second incident portion 223). The second emitting portion 321, the second parallel portion 323, the second light collecting portion 221, and the second incident portion 223 are provided on the same axis. The second emitting part 321 and the second parallel part 323 are provided in the connection part 21, and the second light collecting part 221 and the second incident part 223 are provided in the connection port part 31. The second parallel part 323 is, for example, a transparent collimating lens, and the second condensing part 221 is, for example, a transparent condensing lens.

2A and 2B, in the connection part 21, the first light collecting part 311 and the second parallel part 323 are covered by one cover part 401 provided on the distal end surface of the connection part 21. The cover part 401 protects the first light collecting part 311 and the second parallel part 323, and ensures the water tightness of the connection part 21. As shown in FIG. 2A, the cover 401 is shared by the incident unit 310 and the second exit / incident unit 320.

In the connection port portion 31, as shown in FIG. 2A, the first parallel portion 213 and the second light collecting portion 221 are covered with one cover portion 403 provided on the bottom surface of the connection port portion 31. The cover part 403 protects the first parallel part 213 and the second light collecting part 221 and ensures the water tightness of the connection port part 31. As shown in FIG. 2A, the cover unit 403 is shared by the emitting unit 210 and the first exit / incident unit 220.

The

cover parts

401 and 403 are, for example, transparent glass. As shown in FIGS. 2A and 2C, the cover portion 401 faces the cover portion 403. As shown in FIG. 2C, when the connection part 21 is inserted into the connection port part 31, the space part 40 is interposed between the cover part 401 and the cover part 403, and the cover part 401 is in contact with the cover part 403. do not do.

[Stray light prevention unit 500]
As shown in FIG. 2A, the optical connector 100 further includes a stray light prevention unit 500 provided in the first connector 200 and the second connector 300. In the first connector 200, the stray light prevention unit 500 includes an intrusion of the illumination light IL (first light) as stray light from the first exit / incidence unit 220 and an emission unit of image information light DL (second light) as stray light. At least one of intrusion from 210 is prevented. In the second connector 300, the stray light prevention unit 500 includes an intrusion of the illumination light IL (first light) as stray light from the second exit / incident unit 320 and an incident portion of image information light DL (second light) as stray light. At least one of intrusion from 310 is prevented.

Such a stray light prevention unit 500 functions as an optical filter that reflects, absorbs, or shields part of the stray light.

[Stray light prevention unit 500 in first connector 200]
When the stray light prevention unit 500 prevents the illumination light IL (first light) as stray light from entering from the first exit / incident part 220, the stray light prevention part 500 is provided in the first exit / incident part 220. In this case, the stray light prevention unit 500 functions as a filter having a first wavelength selectivity that transmits the image information light DL but reflects, absorbs, or blocks the illumination light IL. In this case, as shown in FIG. 3A, the transmittance for the image information light DL is high and the transmittance for the illumination light IL is low. As a result, the stray light prevention unit 500 prevents the illumination light IL as stray light from entering from the first light incident / incident unit 220 and traveling through the light guide member 75 to reach the image processing unit 77 as a drive unit.

Further, when the stray light prevention unit 500 prevents the image information light DL (second light) as stray light from entering from the emission unit 210, the stray light prevention unit 500 is provided in the emission unit 210. In this case, the stray light prevention unit 500 functions as a filter having a second wavelength selectivity that transmits the illumination light IL but reflects, absorbs, or blocks the image information light DL. In this case, as shown in FIG. 3B, the transmittance for the image information light DL is low and the transmittance for the illumination light IL is high. As a result, the stray light prevention unit 500 prevents the image information light DL as stray light from entering from the emission unit 210 and traveling through the light guide member 53 to reach the light source unit 51 as the drive unit.

Here, the wavelengths of the illumination light IL are the wavelengths 445 nm, 532 nm, and 635 nm of the laser light emitted from the

light source units

51a, 51b, and 51c. The wavelength of the image information light DL is 850 nm.

As shown in FIGS. 2A and 2C, for example, when the stray light prevention unit 500 prevents the illumination light IL as stray light from entering from the first exit / incident unit 220, the stray light prevention unit 500 is connected to the first exit / incident unit 220. It functions as a dielectric multilayer film that coats the surface of the second light condensing part 221 that is provided and is an optical member through which the image information light DL is transmitted, or functions as a material for the second light condensing part 221. The dielectric multilayer film and material have the first wavelength selectivity described above. As a result, only the illumination light IL is reflected, absorbed or shielded at the position of the second light collector 221, and the image information light DL can pass through the second light collector 221 and enter the light guide member 75. For example, the coating may be performed on at least one of the end face on the emission part (light guide member 75) side and the end face on the incident part (cover part 403) side of the second light collecting part 221.

2A and 2C, for example, when the stray light prevention unit 500 prevents intrusion of image information light DL as stray light from the emission unit 210, the stray light prevention unit 500 is provided in the emission unit 210 and includes illumination light IL. Functions as a dielectric multilayer film that coats the surface of the first parallel portion 213 that is an optical member through which the light passes, or functions as a material for the first parallel portion 213. This dielectric multilayer film and material have the second wavelength selectivity described above. As a result, only the image information light DL is reflected, absorbed or shielded at the position of the first parallel portion 213, and the illumination light IL can pass through the first parallel portion 213 and be emitted from the emission portion 210. For example, the coating may be performed on at least one of the end surface of the first parallel portion 213 on the emitting portion (cover portion 403) side and the end surface on the incident portion (light guide member 53) side.

As shown in FIG. 2D, for example, when the stray light prevention unit 500 prevents the illumination light IL as stray light from entering from the first light entrance / exit part 220, the stray light prevention unit 500 transmits the image information light DL. It may function as a dielectric multilayer film that coats the surface of the cover part 403 that protects the second light collecting part 221 and is an optical protective part provided in the first light incident / incident part 220, or of the cover part 403 It may function as a material. The dielectric multilayer film and material have the first wavelength selectivity described above. Thereby, only the illumination light IL is reflected, absorbed or shielded at the position of the cover part 403, and the image information light DL can pass through the cover part 403 and enter the light guide member 75.

As shown in FIG. 2D, for example, when the stray light prevention unit 500 prevents intrusion of the image information light DL as stray light from the emission unit 210, the stray light prevention unit 500 is a first optical member through which the illumination light IL is transmitted. It may function as a dielectric multilayer film that coats the surface of the cover part 403 that protects the parallel part 213 and is an optical protective part provided in the emitting part 210, or may function as a material of the cover part 403. This dielectric multilayer film and material have the second wavelength selectivity described above. As a result, only the image information light DL is reflected, absorbed or shielded at the position of the cover part 403, and the illumination light IL can pass through the cover part 403 and be emitted from the emission part 210.

In the present embodiment, one cover portion 403 is provided. Therefore, the stray light prevention unit 500 may be provided at least on the first facing surface of the cover portion 403 facing the second light collecting portion 221 and the second facing surface of the cover portion 403 facing the first parallel portion 213. Good. On the first facing surface, the stray light prevention unit 500 reflects, absorbs or blocks only the illumination light IL, and the image information light DL passes through the stray light prevention unit 500. On the second facing surface, the stray light prevention unit 500 reflects, absorbs or shields only the image information light DL, and the illumination light IL passes through the stray light prevention unit 500. In addition, since the function of the stray light prevention unit 500 is different between the first facing surface and the second facing surface, when the stray light prevention unit 500 is realized by the material of the cover unit 403, two cover units 403 having different functions from each other are provided. May be provided, and each of them may be arranged to face the second light collecting part 221 and the first parallel part 213.

As shown in FIG. 2E, for example, when the stray light prevention unit 500 prevents the illumination light IL as stray light from entering from the first exit / incidence unit 220, the stray light prevention unit 500 guides the image information light DL and 1 may function as a dielectric multilayer film that coats the surface of the second incident portion 223 that is an end portion of the light guide member 75 provided in the light incident / incident portion 220, or may function as a material of the second incident portion 223. Also good. The dielectric multilayer film and material have the first wavelength selectivity described above. As a result, only the illumination light IL is reflected, absorbed or shielded at the position of the second incident portion 223, and the image information light DL can pass through the second incident portion 223 and enter the light guide member 75. The material of the second incident part 223 will be described below. The filter is attached to the end portion of the light guide member 75 by, for example, fusion, adhesion, or contact, and functions as the second incident portion 223. The filter material functions as the stray light prevention unit 500. Such a material is, for example, a glass material having filter characteristics or a glass material coated with a filter film.

As shown in FIG. 2E, for example, when the stray light prevention unit 500 prevents intrusion of the image information light DL as stray light from the emission unit 210, the stray light prevention unit 500 guides the illumination light IL to the emission unit 210. It may function as a dielectric multilayer film that coats the surface of the first emission part 211 that is an end of the light guide member 53 provided, or may function as a material of the first emission part 211. This dielectric multilayer film and material have the second wavelength selectivity described above. As a result, only the image information light DL is reflected, absorbed or shielded at the position of the first emission part 211, and the illumination light IL can be emitted from the emission part 210 through the first emission part 211. The material of the first emission part 211 will be described below. The filter is attached to the end portion of the light guide member 53 by, for example, fusion, adhesion, or contact, and functions as the first emitting portion 211. The filter material functions as the stray light prevention unit 500. Such a material is, for example, a glass material having filter characteristics or a glass material coated with a filter film.

Thus, the stray light prevention unit 500 is provided in at least one of the first parallel part 213, the cover part 403, and the first emission part 211 that are optical members in the emission part 210, or functions as at least one material. do it. The stray light prevention unit 500 prevents intrusion of the image information light DL as stray light from the emission unit 210. In this case, the stray light prevention unit 500 functions as a filter having a second wavelength selectivity that transmits the illumination light IL but reflects, absorbs, or blocks the image information light DL. As a result, the stray light prevention unit 500 prevents the image information light DL as stray light from entering from the emission unit 210 and traveling through the light guide member 53 to reach the light source unit 51 as the drive unit.
Further, the stray light preventing unit 500 is provided in at least one of the second light collecting unit 221, the cover unit 403, and the second incident unit 223 that are optical members in the first light incident / incident unit 220, or as at least one material. It only has to function. And the stray light prevention part 500 prevents the penetration | invasion from the 1st exit / incidence part 220 of the illumination light IL as a stray light. In this case, the stray light prevention unit 500 functions as a filter having a first wavelength selectivity that transmits the image information light DL but reflects, absorbs, or blocks the illumination light IL. As a result, the stray light prevention unit 500 prevents the illumination light IL as stray light from entering from the first light incident / incident unit 220 and traveling through the light guide member 75 to reach the image processing unit 77 as a drive unit.

[Stray light prevention unit 500 in second connector 300]
When the stray light preventing unit 500 prevents the illumination light IL (first light) as stray light from entering from the second exit / incident unit 320, the stray light preventing unit 500 is provided in the second exit / incident unit 320. In this case, the stray light prevention unit 500 functions as a filter having a first wavelength selectivity that transmits the image information light DL but reflects, absorbs, or blocks the illumination light IL. In this case, as shown in FIG. 3A, the transmittance for the image information light DL is high and the transmittance for the illumination light IL is low. As a result, the stray light prevention unit 500 prevents the illumination light IL as stray light from entering the second light incident / incident unit 320, traveling through the light guide member 73, and reaching the image acquisition unit 71, which is a drive unit.

Further, when the stray light preventing unit 500 prevents the image information light DL (second light) as stray light from entering from the incident unit 310, the stray light preventing unit 500 is provided in the incident unit 310. In this case, the stray light prevention unit 500 functions as a filter having a second wavelength selectivity that transmits the illumination light IL but reflects, absorbs, or blocks the image information light DL. In this case, as shown in FIG. 3B, the transmittance for the image information light DL is low and the transmittance for the illumination light IL is high. As a result, the stray light prevention unit 500 prevents the image information light DL as stray light from entering from the incident unit 310 and traveling through the light guide member 55 to reach the illumination unit 57 that is the drive unit.

As shown in FIGS. 2A and 2C, for example, when the stray light prevention unit 500 prevents the illumination light IL as stray light from entering from the second exit / incident unit 320, the stray light prevention unit 500 is connected to the second exit / incident unit 320. It functions as a dielectric multilayer film that coats the surface of the second parallel part 323 that is an optical member that is provided and transmits the image information light DL, or functions as a material of the second parallel part 323. The dielectric multilayer film and material have the first wavelength selectivity described above. Thereby, only the illumination light IL is reflected, absorbed or shielded at the position of the second parallel portion 323, and the image information light DL can pass through the second parallel portion 323 and be emitted from the second exit / incident portion 320. The coating only needs to be performed on at least one of the end face on the emission part (cover part 401) side and the end part on the incident part (light guide member 73) side of the second parallel part 323, for example.

2A and 2C, for example, when the stray light prevention unit 500 prevents the image information light DL as stray light from entering from the incident unit 310, the stray light prevention unit 500 is provided in the incident unit 310 and includes illumination light. It functions as a dielectric multilayer film that coats the surface of the first light collector 311 that is an optical member through which IL passes, or functions as a material for the first light collector 311. This dielectric multilayer film and material have the second wavelength selectivity described above. Accordingly, only the image information light DL is reflected, absorbed or shielded at the position of the first light collecting unit 311, and the illumination light IL can pass through the first light collecting unit 311 and enter the light guide member 55. For example, the coating may be performed on at least one of the end face on the emission part (light guide member 55) side and the end face on the incident part (cover part 401) side of the first light collecting part 311.

As shown in FIG. 2D, for example, when the stray light prevention unit 500 prevents the illumination light IL as stray light from entering from the second exit / incidence unit 320, the stray light prevention unit 500 is an optical member through which the image information light DL is transmitted. May function as a dielectric multilayer film that coats the surface of the cover part 401 that protects the second parallel part 323 and that is an optical protective part provided in the second light incident / incident part 320, or the material of the cover part 401 May function as The dielectric multilayer film and material have the first wavelength selectivity described above. As a result, only the illumination light IL is reflected, absorbed, or shielded at the position of the cover 401, and the image information light DL can pass through the cover 401 and enter the light guide member 73.

As shown in FIG. 2D, for example, when the stray light prevention unit 500 prevents intrusion of the image information light DL as stray light from the incident unit 310, the stray light prevention unit 500 is an optical member through which the illumination light IL is transmitted. 1 may function as a dielectric multilayer film that coats the surface of the cover part 401 that protects the light condensing part 311 and is an optical protective part provided in the incident part 310, or may function as a material of the cover part 401 Good. This dielectric multilayer film and material have the second wavelength selectivity described above. As a result, only the image information light DL is reflected, absorbed or shielded at the position of the cover portion 401, and the illumination light IL can pass through the cover portion 401 and enter the light guide member 55.

In the present embodiment, one cover unit 401 is provided. Therefore, the stray light prevention unit 500 may be provided at least on the first facing surface of the cover portion 401 facing the second parallel portion 323 and the second facing surface of the cover portion 401 facing the first light collecting portion 311. Good. On the first facing surface, the stray light prevention unit 500 reflects, absorbs or blocks only the illumination light IL, and the image information light DL passes through the stray light prevention unit 500. On the second facing surface, the stray light prevention unit 500 reflects, absorbs or shields only the image information light DL, and the illumination light IL passes through the stray light prevention unit 500. In addition, since the function of the stray light prevention unit 500 is different between the first facing surface and the second facing surface, when the stray light prevention unit 500 is realized by the material of the cover unit 401, the two cover units 401 having different functions are provided. May be provided, and each of them may be arranged to face the first light collecting portion 311 and the second parallel portion 323.

As shown in FIG. 2E, for example, when the stray light prevention unit 500 prevents the illumination light IL as stray light from entering from the second exit / incidence unit 320, the stray light prevention unit 500 guides the image information light DL and It may function as a dielectric multilayer film that coats the surface of the second emission part 321 that is the end of the light guide member 73 provided in the second emission / incidence part 320 or functions as a material of the second emission part 321. May be. The dielectric multilayer film and material have the first wavelength selectivity described above. As a result, only the illumination light IL is reflected, absorbed or shielded at the position of the second emission part 321, and the image information light DL can be emitted from the second emission part 321 through the second emission part 321. The material of the second emission part 321 described above will be described below. The filter is attached to the end portion of the light guide member 73 by, for example, fusion, adhesion, or contact, and functions as the second emitting portion 321. The filter material functions as the stray light prevention unit 500. Such a material is, for example, a glass material having filter characteristics or a glass material coated with a filter film.

As shown in FIG. 2E, for example, when the stray light prevention unit 500 prevents intrusion of the image information light DL as stray light from the incident unit 310, the stray light prevention unit 500 guides the illumination light IL and enters the incident unit 310. It may function as a dielectric multilayer film that coats the surface of the first incident portion 313 that is an end portion of the light guide member 55 provided in the above, or may function as a material of the first incident portion 313. This dielectric multilayer film and material have the second wavelength selectivity described above. As a result, only the image information light DL is reflected, absorbed or shielded at the position of the first incident portion 313, and the illumination light IL can pass through the first incident portion 313 and enter the light guide member 55. The material of the first incident part 313 will be described below. The filter is attached to the end of the light guide member 55 by, for example, fusion, adhesion, or contact, and functions as the first incident portion 313. The filter material functions as the stray light prevention unit 500. Such a material is, for example, a glass material having filter characteristics or a glass material coated with a filter film.

As described above, the stray light preventing unit 500 is provided in at least one of the first light collecting unit 311, the cover unit 401, and the first incident unit 313, which are optical members, or as at least one material in the incident unit 310. It only has to function. The stray light prevention unit 500 prevents the image information light DL as stray light from entering from the incident unit 310. In this case, the stray light prevention unit 500 functions as a filter having a second wavelength selectivity that transmits the illumination light IL but reflects, absorbs, or blocks the image information light DL. As a result, the stray light prevention unit 500 prevents the image information light DL as stray light from entering from the incident unit 310 and traveling through the light guide member 55 to reach the illumination unit 57 that is the drive unit.
Further, the stray light prevention unit 500 is provided in at least one of the second parallel part 323, the cover part 401, and the second emission part 321 that are optical members in the second exit / incident part 320, or functions as at least one material. do it. The stray light prevention unit 500 prevents the illumination light IL as stray light from entering from the second exit / incident unit 320. In this case, the stray light prevention unit 500 functions as a filter having a first wavelength selectivity that transmits the image information light DL but reflects, absorbs, or blocks the illumination light IL. As a result, the stray light prevention unit 500 prevents the illumination light IL as stray light from entering the second light incident / incident unit 320, traveling through the light guide member 73, and reaching the image acquisition unit 71, which is a drive unit.

[Action]
As illustrated in FIG. 2C, when the illumination light IL travels from the emitting unit 210 to the incident unit 310, a part of the illumination light IL may be reflected or scattered by, for example, the first parallel unit 213 and become stray light. Although the stray light is a small part of the total light amount, the light amount of the illumination light IL is 10 times or more the light amount of the image information light DL. For this reason, the illumination light IL as stray light enters from the entrance /

exit portions

220 and 320 for the image information light DL and reaches the image acquisition unit 71 and the image processing unit 77 which are drive units via the

light guide members

73 and 75. In this case, the illumination light IL as stray light affects the drive unit, and the drive unit causes malfunction due to the stray light. Specifically, in the image acquisition unit 71, the light emission of the conversion unit 71b becomes unstable, and the quality of the optical signal is impaired. In the image processing unit 77, the illumination light IL affects the image generated by the image processing unit 77 as noise, and the quality of the image is impaired.

In this embodiment, the stray light prevention unit 500 is provided, and the stray light prevention unit 500 prevents the illumination light IL as stray light from entering from the entrance /

exit portions

220 and 320. This prevents the illumination light IL as stray light from reaching the image acquisition unit 71 and the image processing unit 77, which are drive units, and prevents the illumination light IL as stray light from affecting the drive unit. As a result, the drive unit operates normally without causing malfunction due to stray light.

Note that the stray light prevention unit 500 also prevents intrusion of the image information light DL as stray light from the emission unit 210 and the incident unit 310. For this reason, the progress of the image information light DL as the stray light to the light source unit 51 and the illuminating unit 57 that are the drive unit is prevented, and the image information light DL as the stray light is prevented from affecting the drive unit. As a result, the drive unit operates normally without causing malfunction due to stray light.

[effect]
In the present embodiment, the stray light prevention unit 500 can prevent the illumination light IL that is stray light from entering the entrance /

exit portions

220 and 320. In other words, in the present embodiment, the imaging is a second application that has optical characteristics different from the optical characteristics of the illumination light IL that is the first light for the illumination unit 50 that is the first application. Intrusion of the illumination light IL as stray light from the entrance /

exit sections

220 and 320 that receive or emit the image information light DL that is the second light for the unit 70 can be prevented. As a result, it is possible to prevent the illumination light IL as stray light from reaching the image acquisition unit 71 and the image processing unit 77 which are drive units. Further, in the present embodiment, it is possible to prevent the image information light DL that is stray light from entering from the emission part 210 and the incident part 310. Thereby, arrival of the image information light DL as stray light to the light source unit 51 and the illuminating unit 57 which are driving units can be prevented.
As a result, in this embodiment, it is possible to prevent the image acquisition unit 71 and the image processing unit 77 that are drive units from causing malfunction due to the illumination light IL that is stray light, and the light source unit 51 that is the drive unit and the illumination It is possible to prevent malfunction of the unit 57 due to the image information light DL that is stray light.

The light amount of the illumination light IL is more than the light amount of the image information light DL and is 10 times or more. If even part of such illumination light IL enters as the stray light from the entrance /

exit sections

220 and 320, the image acquisition section 71 and the image processing section 77 will surely malfunction. However, in the present embodiment, the stray light prevention unit 500 can surely prevent the illumination light IL from entering as stray light, and the image acquisition unit 71 and the image processing unit 77 surely cause malfunction due to the stray light illumination light IL. Can be prevented.

In the first connector 200, the stray light prevention unit 500 is provided in at least one of the emission part 210, specifically, the first emission part 211, the first parallel part 213, and the cover part 403. Thereby, it is possible to prevent the image information light DL from entering from the emission unit 210 as stray light, and it is possible to prevent the light source unit 51 that is a driving unit from causing malfunction due to the image information light DL that is stray light.
In the first connector 200, the stray light prevention unit 500 is provided in at least one of the first light exit / incident part 220, specifically, the second incident part 223, the second light collecting part 221, and the cover part 403. Thereby, it is possible to prevent the illumination light IL from entering from the first light incident / incident unit 220 as stray light, and it is possible to prevent the image processing unit 77 serving as the drive unit from causing a malfunction due to the illumination light IL serving as stray light.

The stray light prevention unit 500 is provided in the second connector 300 at least one of the incident unit 310, specifically, the first incident unit 313, the first light collecting unit 311, and the cover unit 401. Accordingly, it is possible to prevent the image information light DL from entering the incident unit 310 as stray light, and it is possible to prevent the illumination unit 57 serving as the driving unit from causing a malfunction due to the image information light DL serving as stray light.

The stray light prevention unit 500 is provided in the second connector 300 in at least one of the second exit / incident part 320, specifically, the second exit part 321, the second parallel part 323, and the cover part 401. Thereby, it is possible to prevent the illumination light IL from entering from the second light incident / incident unit 320 as stray light, and it is possible to prevent the image acquisition unit 71 that is a driving unit from causing a malfunction due to the illumination light IL that is stray light.

The spectral characteristics of a dielectric multilayer film usually depend on the incident angle of stray light. Therefore, in the stray light prevention unit 500 shown in FIGS. 2A, 2C, and 2D, a part of the stray light is transmitted through the stray light prevention unit 500 according to the incident angle of the stray light, and is guided from the second incident unit 223, for example. There is a risk of intrusion into the member 75. On the other hand, as shown in FIG. 2E, in the case where the second incident portion 223 is provided with the stray light prevention unit 500 that functions as a dielectric multilayer film, the dielectric multilayer film has an allowable angle of incidence of the light guide member 75. As long as the spectral characteristics are secured, stray light can be reliably prevented from entering. In addition, the first parallel part 213, the second light collecting part 221, the cover part 403, the first light collecting part 311, the second parallel part 323, and the cover part 401 are coated, so that intrusion of stray light can be prevented at a low cost. .

[Modification 1 of the first embodiment]
[Constitution]
A first modification of the first embodiment will be described with reference to FIGS. 4, 5A, 5B, 5C, 5D, and 5E. In this modification, only the parts different from the first embodiment will be described.

As shown in FIG. 4, the endoscope system 10 further includes a treatment unit 600 that irradiates the subject 11 with the treatment light TL.

The treatment unit 600 includes a light source unit 601,

light guide members

603 and 605, and an irradiation unit 607. The light source unit 601 and the light guide member 603 are provided in the light source device 30, and the light guide member 605 and the irradiation unit 607 are provided in the endoscope 20.

The light source unit 601 emits a treatment light TL that is a large amount of laser light to incise or stop the subject 11, or emits a treatment light TL that is a laser light for photodynamic treatment. In the former, the wavelength is 2 μm to 3 μm, for example, and the number of outputs of the light source unit 601 is several W to several tens W. In the latter, the wavelength is, for example, 635 nm to 670 nm, and the output number of the light source unit 601 is 100 mW.

The

light guide members

603 and 605 are single-wire optical fibers. The light guide member 603 is optically connected to the light guide member 605 by the optical connector 100. The

light guide members

603 and 605 guide the treatment light TL to the irradiation unit 607.

The control unit 81 controls the light source unit 601 based on the instruction input from the input unit 83. For example, the control unit 81 controls the treatment mode of the light source unit 601. The treatment mode indicates, for example, incision or hemostasis, or photodynamic treatment, and is input by the input unit 83.

In this modification, attention is paid to the illumination unit 50 or the treatment unit 600 and the imaging unit 70. In this case, if the illumination unit 50 or the treatment unit 600 is defined as a site for the first application, the illumination light IL or the treatment light TL is defined as the first light. The imaging unit 70 is defined as a part for the second application, and the image information light DL is defined as second light having optical characteristics different from the optical characteristics of the illumination light IL or the treatment light TL as the first light. . That is, the relationship between the illumination unit 50 and the imaging unit 70 in the first embodiment corresponds to the relationship between the illumination unit 50 or the treatment unit 600 and the imaging unit 70 in this modification. The first light amount of the illumination light IL or the treatment light TL that is the first light is larger than the second light amount of the image information light DL that is the second light, and is 10 times or more the second light amount.

In this case, as shown in FIG. 5A, the emitting unit 210 and the incident unit 310 are provided for the illumination unit 50 and the treatment unit 600. The configuration of the emitting unit 210 and the incident unit 310 of the illumination unit 50 of the present modification is the same as the configuration of the emitting unit 210 and the incident unit 310 of the illumination unit 50 of the first embodiment. The configurations of the unit 210 and the incident unit 310 are the same. For this reason, description of the emitting part 210 and the incident part 310 of the treatment unit 600 is omitted. The 1st emission part 211 is also an edge part of the light guide member 603 from which the treatment light TL is emitted. The 1st incident part 313 is also an edge part of the light guide member 605 in which the treatment light TL condensed by the 1st condensing part 311 injects. The cover unit 401 protects the first light collecting unit 311 of the illumination unit 50 and the treatment unit 600 and the second parallel unit 323 of the imaging unit 70. The cover part 403 protects the first parallel part 213 of the illumination unit 50 and the treatment unit 600 and the second light collecting part 221 of the imaging unit 70.

The emitting unit 210 and the incident unit 310 for the illumination light IL and the treatment light TL, respectively, are provided on the same axis and are used for the first application (the illumination light IL or the treatment light TL).
The first exit / incident section 220 and the second exit / incident section 320 are provided on the same axis and are used for the second application (image information light DL).
For example, the two emission units 210 and the first emission / incident unit 220 for the illumination light IL and the treatment light TL are provided on the same circle with the central axis of the first connector 200 as a center.
For example, the two incident portions 310 and the second exit / incident portion 320 for the illumination light IL and the treatment light TL are provided on the same circle around the central axis of the second connector 300.

The emitting unit 210 and the incident unit 310 for the illumination light IL are different systems from the emitting unit 210 and the incident unit 310 for the treatment light TL, and the first exit / incident unit 220 and the second exit / incident unit 320. , Different parts. As described above, the optical connector 100 is provided for each use, and has a plurality of different ports depending on the use. In this embodiment, for example, three ports are provided for the illumination light IL, the treatment light TL, and the image information light DL.

As shown in FIG. 5A, in the treatment unit 600, the emitting unit 210 is optically connected to the light guide member 603, and the treatment light TL is guided by the light guide member 603. The emitting unit 210 is optically connected to the incident unit 310 and emits treatment light TL toward the incident unit 310. The treatment light TL emitted from the emission unit 210 is incident on the incidence unit 310. The incident part 310 is optically connected to the light guide member 605, and the treatment light TL incident on the incident part 310 is guided to the irradiation part 607 by the light guide member 605.

As shown in FIG. 5A, the stray light prevention unit 500 is configured to prevent the illumination light IL (first light) or the treatment light TL (first light) as stray light from entering the first light incident / incident unit 220 in the first connector 200. Then, at least one of intrusion of the image information light DL (second light) as stray light from the emission unit 210 is prevented. In the second connector 300, the stray light prevention unit 500 enters the illumination light IL (first light) or treatment light TL (first light) as stray light from the second light incident / incident unit 320, and image information light as stray light. This prevents at least one of DL (second light) from entering from the incident portion 310.

[Stray light prevention unit 500 in first connector 200]
When the stray light prevention unit 500 prevents the illumination light IL (first light) or the treatment light TL (first light) as stray light from entering from the first exit / incident unit 220, the stray light prevention unit 500 is the first exit / incident unit. 220. In this case, the stray light prevention unit 500 functions as a filter having third wavelength selectivity that transmits the image information light DL but reflects, absorbs, or shields the illumination light IL or the treatment light TL. In this case, as shown in FIGS. 5B and 5C, the transmittance for the image information light DL is high, and the transmittance for the illumination light IL or the treatment light TL is low. In FIG. 5B, the treatment light TL is used for photodynamic treatment. In FIG. 5C, the treatment light TL is used for incision or hemostasis. As a result, the stray light prevention unit 500 prevents the illumination light IL or the treatment light TL as stray light from entering the first light entrance / exit part 220 and traveling through the light guide member 75 to reach the image processing unit 77 as a drive unit. To do.

Further, when the stray light prevention unit 500 prevents the image information light DL (second light) as stray light from entering the exit unit 210 between the illumination unit 50 and the treatment unit 600, the stray light prevention unit 500 is connected to the illumination unit 50. It is provided in the emitting unit 210 with the treatment unit 600. In this case, the stray light prevention unit 500 functions as a filter having the fourth wavelength selectivity that transmits the illumination light IL or the treatment light TL but reflects, absorbs, or shields the image information light DL. In this case, as shown in FIGS. 5D and 5E, the transmittance for the image information light DL is low, and the transmittance for the illumination light IL or the treatment light TL is high. In FIG. 5D, the treatment light TL is used for photodynamic treatment. In FIG. 5E, the treatment light TL is used for incision or hemostasis. As a result, the stray light prevention unit 500 causes the image information light DL as stray light to enter from the emission unit 210 of the illumination unit 50 and the treatment unit 600 and travels through the

light guide members

53 and 603 and the light source unit 51 and the light source unit as drive units. Reaching 601 is prevented.

light source units

51a, 51b, and 51c. The wavelength of the treatment light TL is 2 μm to 3 μm for incision or hemostasis, or 635 nm to 670 nm for photodynamic treatment. The wavelength of the image information light DL is 850 nm.

Note that the illumination light IL and the image information light DL in the second condensing unit 221, the first parallel unit 213, the cover unit 403, the second incident unit 223, and the first emission unit 211 described in the first embodiment are used. 5A corresponds to the relationship between the illumination light IL or the treatment light TL and the image information light DL in FIG. 5A of the present modification, and detailed description thereof is omitted.
In addition, the relationship between the illumination unit 50 and the imaging unit 70 in the second light collecting unit 221, the first parallel unit 213, the cover unit 403, the second incident unit 223, and the first output unit 211 described in the first embodiment. In FIG. 5A of the present modification, this corresponds to the relationship between the illumination unit 50 or the treatment unit 600 and the imaging unit 70, and a detailed description thereof will be omitted.

[Stray light prevention unit 500 in second connector 300]
When the stray light prevention unit 500 prevents the illumination light IL (first light) or the treatment light TL (first light) as stray light from entering from the second exit / incident unit 320, the stray light prevention unit 500 is the second exit / incident unit. 320 is provided. In this case, the stray light prevention unit 500 functions as a filter having third wavelength selectivity that transmits the image information light DL but reflects, absorbs, or shields the illumination light IL or the treatment light TL. In this case, as shown in FIGS. 5B and 5C, the transmittance for the image information light DL is high, and the transmittance for the illumination light IL or the treatment light TL is low. In FIG. 5B, the treatment light TL is used for photodynamic treatment. In FIG. 5C, the treatment light TL is used for incision or hemostasis. As a result, the stray light prevention unit 500 prevents the illumination light IL or the treatment light TL as stray light from entering the second exit / incidence unit 320 and traveling through the light guide member 73 to reach the image acquisition unit 71 which is a drive unit. To do.

Further, when the stray light prevention unit 500 prevents the image information light DL (second light) as stray light from entering the incident unit 310 between the illumination unit 50 and the treatment unit 600, the stray light prevention unit 500 is connected to the illumination unit 50. It is provided in the incident part 310 with the treatment unit 600. In this case, the stray light prevention unit 500 functions as a filter having the fourth wavelength selectivity that transmits the illumination light IL or the treatment light TL but reflects, absorbs, or shields the image information light DL. In this case, as shown in FIGS. 5D and 5E, the transmittance for the image information light DL is low, and the transmittance for the illumination light IL or the treatment light TL is high. In FIG. 5D, the treatment light TL is used for photodynamic treatment. In FIG. 5E, the treatment light TL is used for incision or hemostasis. As a result, the stray light prevention unit 500 causes the image information light DL as stray light to enter from the incident unit 310 of the illumination unit 50 and the treatment unit 600 and travels through the

light guide members

55 and 605 and the illumination unit 57 and the irradiation unit as drive units. Reaching 607 is prevented.

Note that the illumination light IL and the image information light DL in the second parallel part 323, the first light collecting part 311, the cover part 401, the second emission part 321 and the first incident part 313 described in the first embodiment are used. 5A corresponds to the relationship between the illumination light IL or the treatment light TL and the image information light DL in FIG. 5A of the present modification, and detailed description thereof is omitted.
Further, the relationship between the illumination unit 50 and the imaging unit 70 in the second parallel part 323, the first light collecting part 311, the cover part 401, the second emission part 321 and the first incident part 313 described in the first embodiment. In FIG. 5A of the present modification, this corresponds to the relationship between the illumination unit 50 or the treatment unit 600 and the imaging unit 70, and a detailed description thereof will be omitted.

[effect]
In this modification, the stray light prevention unit 500 can prevent the illumination light IL or the treatment light TL, which is stray light, from entering and exiting the

units

220 and 320. Accordingly, it is possible to prevent the illumination light IL or the treatment light TL as stray light from reaching the image acquisition unit 71 and the image processing unit 77 which are driving units.

The light amount of the illumination light IL or the treatment light TL is more than the light amount of the image information light DL and is 10 times or more. If even part of such illumination light IL or treatment light TL enters from the entrance /

exit portions

220 and 320 as stray light, the image acquisition unit 71 and the image processing unit 77 surely cause malfunction. However, in the present modification, the stray light prevention unit 500 can reliably prevent the illumination light IL or the treatment light TL from entering as stray light, and the image acquisition unit 71 and the image processing unit 77 can reliably perform the illumination light IL or stray light. It is possible to surely prevent malfunction due to the treatment light TL.

[Modification 2 of the first embodiment]
[Constitution]
A modification 2 of the first embodiment will be described with reference to FIGS. 6A, 6B, 6C, 6D, and 6E. In this modification, only different portions from the first embodiment and Modification 1 of the first embodiment are described.

In this modification, attention is paid to the treatment unit 600 and the illumination unit 50. In this case, if the treatment unit 600 is defined as a site for the first application, the treatment light TL is defined as the first light. The illumination unit 50 is defined as a part for the second application, and the illumination light IL is defined as second light having optical characteristics different from the optical characteristics of the treatment light TL (first light). That is, the relationship between the illumination unit 50 and the imaging unit 70 in the first embodiment corresponds to the relationship between the treatment unit 600 and the illumination unit 50 in this modification. The first light amount of the treatment light TL (first light) is larger than the second light amount of the illumination light IL (second light) and is 10 times or more the second light amount.

In this case, as shown in FIG. 6A, the emitting unit 210 and the incident unit 310 are provided for the treatment unit 600. The first exit / incident part 220 and the second exit / incident part 320 are provided for the illumination unit 50. The first exit / incident section 220 is optically connected to the second exit / incident section 320 and emits the illumination light IL toward the second exit / incident section 320. The second exit / incident part 320 is optically connected to the first exit / incident part 220, and the illumination light IL emitted from the first exit / incident part 220 is incident on the second exit / incident part 320. The first entrance / exit part 220 is optically connected to the light guide member 53, and the illumination light IL is guided by the light guide member 53. The second light incident / incident part 320 is optically connected to the light guide member 55, and the illumination light IL incident on the second light incident / incident part 320 is guided to the illumination part 57 by the light guide member 55. The configuration of the first exit / incident unit 220 and the second exit / incident unit 320 of the illumination unit 50 of the present modification is the same as the configuration of the exit unit 210 and the entrance unit 310 of the illumination unit 50 of the first embodiment. .

As shown in FIG. 6A, the stray light prevention unit 500 includes, as the stray light, intrusion from the first incident / incident unit 220 for the illumination light IL of the treatment light TL (first light) as stray light in the first connector 200. This prevents at least one of the illumination light IL (second light) from entering from the emission part 210. In the second connector 300, the stray light prevention unit 500 enters the second light incident / incident unit 320 for the illumination light IL of the treatment light TL (first light) as stray light and the illumination from the incident unit 310 as stray light. At least one of intrusion of light IL (second light) is prevented.

[Stray light prevention unit 500 in first connector 200]
When the stray light prevention unit 500 prevents the treatment light TL (first light) as stray light from entering the first light incident / incident unit 220 for the illumination light IL, the stray light prevention unit 500 performs the first operation for the illumination light IL. The exit / incident part 220 is provided. In this case, the stray light prevention unit 500 functions as a filter having a fifth wavelength selectivity that transmits the illumination light IL but reflects, absorbs, or shields the treatment light TL. In this case, as shown in FIGS. 6B and 6C, the transmittance for the illumination light IL is high and the transmittance for the treatment light TL is low. In FIG. 6B, the treatment light TL is used for photodynamic treatment. In FIG. 6C, the treatment light TL is used for incision or hemostasis. Accordingly, the stray light prevention unit 500 indicates that the treatment light TL as stray light enters from the first light incident / incident unit 220 for the illumination light IL, travels through the light guide member 53, and reaches the light source unit 51 that is the drive unit. To prevent.

Further, when the stray light preventing unit 500 prevents the illumination light IL (second light) as stray light from entering from the emitting unit 210, the stray light preventing unit 500 is provided in the emitting unit 210. In this case, the stray light prevention unit 500 functions as a filter having the sixth wavelength selectivity that transmits the treatment light TL but reflects, absorbs, or blocks the illumination light IL. In this case, as shown in FIGS. 6D and 6E, the transmittance for the illumination light IL is low and the transmittance for the treatment light TL is high. In FIG. 6D, the treatment light TL is used for photodynamic treatment. In FIG. 6E, the treatment light TL is used for incision or hemostasis. As a result, the stray light prevention unit 500 prevents the illumination light IL as stray light from entering from the emission unit 210 and traveling through the light guide member 603 to reach the light source unit 601 as a drive unit.

light source units

51a, 51b, and 51c. The wavelength of the treatment light TL is 2 μm to 3 μm for incision or hemostasis, or 635 nm to 670 nm for photodynamic treatment.

Note that the illumination light IL and the image information light DL in the second condensing unit 221, the first parallel unit 213, the cover unit 403, the second incident unit 223, and the first emission unit 211 described in the first embodiment are used. 6A corresponds to the relationship between the treatment light TL and the illumination light IL in FIG. 6A of the present modification, and detailed description thereof is omitted.
In addition, the relationship between the illumination unit 50 and the imaging unit 70 in the second light collecting unit 221, the first parallel unit 213, the cover unit 403, the second incident unit 223, and the first output unit 211 described in the first embodiment. 6A corresponds to the relationship between the treatment unit 600 and the illumination unit 50 in FIG. 6A of this modification, and detailed description thereof is omitted.

[Stray light prevention unit 500 in second connector 300]
When the stray light prevention unit 500 prevents the treatment light TL (first light) as stray light from entering the second exit / incident unit 320 for the illumination light IL, the stray light prevention unit 500 is provided in the second exit / incident unit 320. It is done. In this case, the stray light prevention unit 500 functions as a filter having a fifth wavelength selectivity that transmits the illumination light IL but reflects, absorbs, or shields the treatment light TL. In this case, as shown in FIGS. 6B and 6C, the transmittance for the illumination light IL is high and the transmittance for the treatment light TL is low. In FIG. 6B, the treatment light TL is used for photodynamic treatment. In FIG. 6C, the treatment light TL is used for incision or hemostasis. Thereby, the stray light prevention unit 500 indicates that the treatment light TL as stray light enters from the second exit / incident unit 320 for the illumination light IL, travels through the light guide member 55, and reaches the illumination unit 57 which is a drive unit. To prevent.

Further, when the stray light preventing unit 500 prevents the illumination light IL (second light) as stray light from entering from the incident unit 310, the stray light preventing unit 500 is provided in the incident unit 310. In this case, the stray light prevention unit 500 functions as a filter having the sixth wavelength selectivity that transmits the treatment light TL but reflects, absorbs, or blocks the illumination light IL. In this case, as shown in FIGS. 6D and 6E, the transmittance for the illumination light IL is low and the transmittance for the treatment light TL is high. In FIG. 6D, the treatment light TL is used for photodynamic treatment. In FIG. 6E, the treatment light TL is used for incision or hemostasis. As a result, the stray light prevention unit 500 prevents the illumination light IL as stray light from entering from the incident unit 310, traveling through the light guide member 605, and reaching the irradiation unit 607 that is the drive unit.

Note that the illumination light IL and the image information light DL in the second parallel part 323, the first light collecting part 311, the cover part 401, the second emission part 321 and the first incident part 313 described in the first embodiment are used. 6A corresponds to the relationship between the treatment light TL and the illumination light IL in FIG. 6A of the present modification, and detailed description thereof is omitted.
Further, the relationship between the illumination unit 50 and the imaging unit 70 in the second parallel part 323, the first light collecting part 311, the cover part 401, the second emission part 321 and the first incident part 313 described in the first embodiment. 6A corresponds to the relationship between the treatment unit 600 and the illumination unit 50 in FIG. 6A of this modification, and detailed description thereof is omitted.

[effect]
In this modification, the stray light prevention unit 500 can prevent the treatment light TL, which is stray light, from entering from the incident /

incident units

220 and 320 for illumination light. Accordingly, it is possible to prevent the treatment light TL as stray light from reaching the light source unit 51 and the illuminating unit 57 that are driving units.

The light quantity of the treatment light TL is more than the light quantity of the illumination light IL and is 10 times or more. If even part of the treatment light TL enters as the stray light from the entrance /

exit portions

220 and 320 for the illumination light IL, the light source unit 51 and the illumination unit 57 surely cause a malfunction. However, in the present embodiment, the stray light prevention unit 500 can reliably prevent the treatment light TL from entering as stray light, and the light source unit 51 and the illumination unit 57 surely cause malfunction due to the treatment light TL that is stray light. Can be prevented.
When the treatment light TL, which is a large amount of laser light, enters from the first exit / incident part 220 for the illumination light IL, the light source unit 51 does not operate because the difference in the amount of light between the treatment light TL and the illumination light IL is large. There is a risk of becoming stable. When the treatment light TL, which is laser light for photodynamic treatment and has a wavelength region close to the illumination light IL, enters from the second exit / incident part 320 for the illumination light IL, the illumination light IL emitted from the illumination part 57 The color may change slightly. However, in this modified example, the stray light prevention unit 500 can prevent the treatment light TL, which is stray light, from entering / exiting

portions

220 and 320 for illumination light, and the light source unit 51 and the illumination unit 57 are surely stray light. It is possible to prevent malfunction caused by the treatment light TL.

[Modification 3 of the first embodiment]
[Constitution]
A modification 3 of the first embodiment will be described with reference to FIGS. 5A, 7A, 7B, 7C, 7D, 7E, and 7F. In this modification, only the parts different from the first embodiment and the

modifications

1 and 2 of the first embodiment will be described.
The stray light prevention unit 500 transmits only light used in each port (application) and prevents intrusion of stray light other than this light.

As shown in FIG. 7A and FIG. 7D, in the second emitting part 321, the second parallel part 323, the

cover parts

401 and 403, the second condensing part 221 and the second incident part 223 in which the image information light DL travels. The stray light prevention unit 500 transmits only the image information light DL and prevents the illumination light IL and the treatment light TL, which are stray light, from entering. The stray light prevention unit 500 reflects, absorbs, or blocks the illumination light IL and the treatment light TL. In this case, the transmittance for the image information light DL is high, and the transmittance for the illumination light IL and the treatment light TL is low. In FIG. 7A, the treatment light TL is used for photodynamic treatment. In FIG. 7D, the treatment light TL is used for incision or hemostasis.

As shown in FIG. 7B and FIG. 7E, in the first emitting part 211, the first parallel part 213, the

cover parts

403 and 401, the second condensing part 311 and the first incident part 313 in which the illumination light IL travels, The stray light prevention unit 500 transmits only the illumination light IL, and prevents the image information light DL and the treatment light TL that are stray light from entering. The stray light prevention unit 500 reflects, absorbs, or blocks the image information light DL and the treatment light TL. In this case, the transmittance for the illumination light IL is high, and the transmittance for the image information light DL and the treatment light TL is low. In FIG. 7B, the treatment light TL is used for photodynamic treatment. In FIG. 7E, the treatment light TL is used for incision or hemostasis.

As shown in FIG. 7C and FIG. 7F, in the first emitting part 211, the first parallel part 213, the

cover parts

403 and 401, the second condensing part 311 and the first incident part 313 in which the treatment light TL travels, The stray light prevention unit 500 transmits only the treatment light TL and prevents the illumination light IL and the image information light DL that are stray light from entering. The stray light prevention unit 500 reflects, absorbs, or blocks the illumination light IL and the image information light DL. In this case, the transmittance with respect to the treatment light TL is high, and the transmittance with respect to the image information light DL and the illumination light IL is low. In FIG. 7C, the treatment light TL is used for photodynamic treatment. In FIG. 7F, the treatment light TL is used for incision or hemostasis.

[effect]
In this modification, only the light used in each port (application) can be transmitted, and stray light other than this light can be prevented from entering. Thereby, stray light can be prevented from reaching the drive unit. And it can prevent that a drive part causes malfunction by stray light.

In this modification, the stray light prevention unit 500 transmits only light used in each port (use) and prevents intrusion of stray light other than this light, but is not limited thereto.
For example, the stray light prevention unit 500 may block only light that is output with an output number larger than the output number of light used in each port (use).
For example, the stray light prevention unit 500 that transmits the image information light DL prevents the illumination light IL and the treatment light TL that are stray light from entering.
For example, the stray light prevention unit 500 that transmits the illumination light IL only prevents the treatment light TL that is stray light from entering.
For example, the stray light prevention unit 500 that transmits the treatment light TL does not reflect, absorb, or shield the illumination light IL and the image information light DL as stray light.
Even in this case, the drive unit does not substantially cause a malfunction.

[Others]
In the first and second modifications, the light source device 30 includes an illumination unit 50 and a treatment unit 600 that are two first and second emission units that emit the illumination light IL and the treatment light TL from the light source device 30 toward the endoscope 20. Is provided. The endoscope 20 includes an imaging unit 70 that is one third emission unit that emits image information light DL from the endoscope 20 toward the light source device 30.
Here, it is assumed that the endoscope 20 includes a fourth emission unit that emits light from the endoscope 20 toward the light source device 30 and is different from the imaging unit 70 that is the third emission unit.

At this time, it is assumed that the light quantity in the imaging unit 70 which is the third emission unit is substantially the same as the light quantity in the fourth emission unit, for example.
In this case, the relationship between the imaging unit 70 or the fourth emission unit that is the third emission unit and the illumination unit 50 that is the first emission unit is the illumination that is the first emission unit described in the first modification. This corresponds to the relationship between the treatment unit 600 that is the unit 50 or the second emission unit and the imaging unit 70 that is the third emission unit.
The relationship between the imaging unit 70 or the fourth emission unit that is the third emission unit and the treatment unit 600 that is the second emission unit is the illumination unit 50 or second that is the first emission unit described in Modification 1. This corresponds to the relationship between the treatment unit 600 that is the emission unit and the imaging unit 70 that is the third emission unit.

Alternatively, it is assumed that the light amount in the imaging unit 70 that is the third emission unit is 10 times or more, or 1/10 or less than the light amount in the fourth emission unit.
Then, in this case, the relationship between the imaging unit 70 that is the third emission unit and the fourth emission unit is the illumination that is the treatment unit 600 that is the first emission unit and the illumination that is the second emission unit, as described in Modification 2. This corresponds to the relationship with the unit 50.

[Second Embodiment]
[Constitution]
The second embodiment will be described with reference to FIGS. 8A, 8B, and 8C. In the present embodiment, only the parts different from the first embodiment will be described.

The stray light prevention unit 500 is provided between the emission unit 210 and the incident unit 310, and the first output / incident unit 220 and the second output / incident unit 320. The stray light prevention unit 500 functions as a wall unit provided in the connection unit 21. The first surface of the stray light prevention unit 500 on the emission unit 210 and the incident unit 310 side reflects, absorbs, or shields the illumination light IL, and the illumination light IL to the first output / incident unit 220 and the second output / incident unit 320 is reflected. Prevent progress. The second surface of the stray light prevention unit 500 on the first exit / incident part 220 and the second exit / incident part 320 side reflects, absorbs, or shields the image information light DL, and the image information light to the exit part 210 and the entrance part 310. Prevent the progression of DL. For this reason, the 1st surface and the 2nd surface are painted black or a mirror is arranged, for example. The wall portion is, for example, metal or resin.

When the connection part 21 is connected to the connection port part 31, a part of the stray light prevention part 500 engages with the recess 33 provided in the connection port part 31. The stray light prevention unit 500 is disposed along the insertion direction of the connection part 21 with respect to the connection port part 31. The stray light prevention unit 500 divides the space 40 and structurally blocks it. For this reason, the cover part 401 is provided corresponding to the first light collecting part 311 and the second parallel part 323, respectively, and the cover part 403 is provided corresponding to the second light collecting part 221 and the first parallel part 213, respectively. Provided.

[effect]
In the present embodiment, the wall portion that is the stray light prevention unit 500 can prevent the illumination light IL that is stray light from entering the entrance /

exit portions

220 and 320. In the present embodiment, the stray light prevention unit 500 physically blocks the space 40 even if the optical characteristic of the illumination light IL that is the first light approximates the optical characteristic of the image information light DL that is the second light. Therefore, intrusion of stray light can be prevented.

The positional relationship between the stray light prevention unit 500 and the recess 33 may be reversed.

The stray light prevention unit 500 of the present embodiment may be incorporated in the first and second modifications of the first embodiment, respectively.
In the first modified example, the stray light prevention unit 500 prevents the illumination light IL or the treatment light TL from traveling as stray light to the first exit / incident unit 220 and the second exit /

incident unit

320, and 2. Intrusion of illumination light IL or treatment light TL as stray light from the entrance / exit section 320 is prevented. The stray light prevention unit 500 prevents the image information light DL from traveling as stray light to the emission unit 210 and the incident unit 310, and prevents the image information light DL from entering the stray light from the emission unit 210 and the incident unit 310. .

In the second modification, the stray light preventing unit 500 prevents the treatment light TL from proceeding as stray light to the first exit / incident unit 220 and the second exit / incident unit 320, and the first exit / incident unit 220 and the second exit / incident unit. Intrusion of the treatment light TL as stray light from 320 is prevented. The stray light prevention unit 500 prevents the illumination light IL as stray light from traveling to the emission unit 210 and the incident unit 310, and prevents the illumination light IL as stray light from entering from the emission unit 210 and the incidence unit 310.

The present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment.

Claims

An endoscope side connector provided in an endoscope is detachable, a light source side connector provided in a light source device,
When the endoscope-side connector is connected to the light source-side connector, the emitting portion is optically connected to an incident portion provided in the endoscope-side connector and emits first light toward the incident portion. When,
When the endoscope-side connector is connected to the light source-side connector, the endoscope-side connector is optically connected to the endoscope-side entrance / exit portion, and the endoscope-side entrance / exit portion A light source side entrance / exit part for emitting the second light having optical characteristics different from the first light toward or entering the second light emitted from the endoscope side exit / incidence part;
A stray light prevention unit for preventing at least one of intrusion from the light source side entrance / exit part of the first light as stray light and intrusion from the exit part of the second light as stray light;
A light source side connector.
The optical characteristic is a light amount,
The light source side connector according to claim 1, wherein the first light amount of the first light is larger than the second light amount of the second light.
The light source side connector according to claim 2, wherein the first light quantity is 10 times or more the second light quantity.
The emitting unit emits the first light for illumination or treatment,
The light source side connector according to claim 2, wherein the second light for information transmission is incident on the light source side light incident / incident part.
The emitting unit emits the first light for treatment,
The light source side connector according to claim 2, wherein the light source side entrance / exit part emits the second light for illumination.
The light source connector according to claim 1, wherein the stray light prevention unit functions as a filter that reflects, absorbs, or blocks a part of stray light.
When the stray light prevention unit prevents intrusion of the first light as stray light from the light source side light incident / incident part, the stray light prevention part is provided in the light source side light incident / incident part and transmits the second light. Functions as a dielectric film that coats the surface of the optical member, or functions as a material of the optical member,
When the stray light prevention unit prevents intrusion of the second light as stray light from the emission unit, the stray light prevention unit coats a surface of an optical member provided in the emission unit and through which the first light is transmitted. The light source side connector according to claim 6, functioning as a dielectric film or functioning as a material of the optical member.
When the stray light prevention unit prevents intrusion of the first light as stray light from the light source side entrance / exit part, the stray light prevention unit protects the optical member through which the second light is transmitted and the light source side output. Functions as a dielectric film that coats the surface of the optical protective part provided in the incident part, or functions as a material of the optical protective part,
When the stray light prevention unit prevents intrusion of the second light as stray light from the emission unit, the stray light prevention unit protects an optical member through which the first light passes and is provided in the emission unit. The light source side connector according to claim 6, wherein the light source side connector functions as a dielectric film that coats the surface of the protection part or as a material of the optical protection part.
When the stray light prevention unit prevents intrusion of the first light as stray light from the light source side entrance / exit part, the stray light prevention part guides the second light and is provided in the light source side exit / incidence part. Function as a dielectric film that coats the surface of the end of the light guide member to be formed, or function as a material of the end,
When the stray light prevention unit prevents intrusion of the second light as stray light from the emission part, the stray light prevention part guides the first light and an end of a light guide member provided in the emission part. The light source side connector according to claim 6, wherein the light source side connector functions as a dielectric film that coats the surface of the portion or functions as a material of the end portion.
The emitting unit emits the first light for illumination or treatment,
The second light for information transmission is incident on the light source side incident / incident part,
When the stray light prevention unit prevents intrusion of the first light as stray light from the light source side incident / incident part, the stray light prevention part is provided in the light source side incident / incident part,
2. The light source side connector according to claim 1, wherein when the stray light prevention unit prevents intrusion of the second light as stray light from the emission unit, the stray light prevention unit is provided in the emission unit.
The emitting unit emits the first light for treatment,
The light source side entrance / exit section emits the second light for illumination,
When the stray light prevention unit prevents intrusion of the first light as stray light from the light source side incident / incident part, the stray light prevention part is provided in the light source side incident / incident part,
2. The light source side connector according to claim 1, wherein when the stray light prevention unit prevents intrusion of the second light as stray light from the emission unit, the stray light prevention unit is provided in the emission unit.
2. The light source side connector according to claim 1, wherein the stray light preventing unit is provided between the emitting unit and the incident unit, and the light source side projecting unit and the endoscope side projecting unit.
The emitting unit emits the first light for illumination or treatment,
The light source side connector according to claim 12, wherein the second light for information transmission is incident on the light source side light incident / incident part.
The emitting unit emits the first light for treatment,
The light source side connector according to claim 12, wherein the light source side light incident / exit section emits the second light for illumination.
An endoscope-side connector provided in an endoscope, detachably attached to a light source-side connector provided in a light source device,
An incident portion that is optically connected to an emission portion provided in the light source side connector when the endoscope side connector is connected to the light source side connector, and that receives the first light emitted from the emission portion; ,
When the endoscope side connector is connected to the light source side connector, the first light is optically connected to a light source side light incident / incident part provided in the light source side connector, toward the light source side light incident / incident part. An endoscope side exit / incident part that emits the second light having optical characteristics different from the above, or the second light emitted from the light source side exit / incident part;
A stray light prevention unit for preventing at least one of intrusion of the first light as stray light from the entrance / exit part on the endoscope side and intrusion from the incident part of the second light as stray light;
An endoscope-side connector comprising:
The optical characteristic is a light amount,
The endoscope side connector according to claim 15, wherein the first light quantity of the first light is larger than the second light quantity of the second light.
The endoscope side connector according to claim 16, wherein the first light quantity is 10 times or more of the second light quantity.
The first light for illumination or treatment is incident on the incident portion,
The endoscope-side connector according to claim 16, wherein the endoscope-side exit / incident part emits the second light for information transmission.
The first light for treatment is incident on the incident portion,
The endoscope-side connector according to claim 16, wherein the second light for illumination is incident on the endoscope-side exit / incident part.
The endoscope-side connector according to claim 15, wherein the stray light prevention unit functions as a filter that reflects, absorbs, or blocks a part of stray light.
When the stray light prevention unit prevents intrusion of the first light as stray light from the endoscope side exit / incident part, the stray light prevention part is provided in the endoscope side exit / incident part and the second Functions as a dielectric film that coats the surface of the optical member through which light passes, or functions as a material for the optical member,
When the stray light prevention unit prevents intrusion of the second light as stray light from the incident part, the stray light prevention part coats a surface of an optical member provided in the incident part and through which the first light is transmitted. The endoscope-side connector according to claim 20, wherein the endoscope-side connector functions as a dielectric film or functions as a material of the optical member.
When the stray light prevention unit prevents intrusion of the first light as stray light from the endoscope side entrance / exit part, the stray light prevention unit protects the optical member through which the second light is transmitted and the inner light. Functions as a dielectric film that coats the surface of the optical protective part provided in the endoscope side light incident / incident part, or functions as a material of the optical protective part,
When the stray light prevention unit prevents intrusion of the second light as stray light from the incident part, the stray light prevention part protects an optical member through which the first light passes and is provided in the incident part. The endoscope-side connector according to claim 20, wherein the endoscope-side connector functions as a dielectric film that coats the surface of the protective part or functions as a material of the optical protective part.
When the stray light prevention unit prevents intrusion of the first light as stray light from the endoscope side exit / incident part, the stray light prevention unit guides the second light and outputs the first light. Functions as a dielectric film that coats the surface of the end portion of the light guide member provided in the incident portion, or functions as a material of the end portion,
When the stray light prevention unit prevents intrusion of the second light as stray light from the incident part, the stray light prevention part guides the first light and an end of a light guide member provided in the incident part. The endoscope-side connector according to claim 20, wherein the endoscope-side connector functions as a dielectric film that coats the surface of the portion or functions as a material of the end portion.
The first light for illumination or treatment is incident on the incident portion,
The endoscope side exit / incident part emits the second light for information transmission,
When the stray light prevention unit prevents the first light as stray light from entering from the endoscope side exit / incident part, the stray light prevention part is provided in the endoscope side exit / incident part,
The endoscope-side connector according to claim 15, wherein when the stray light prevention unit prevents the second light as stray light from entering from the incident part, the stray light prevention part is provided in the incident part.
The first light for treatment is incident on the incident portion,
The second light for illumination is incident on the endoscope side exit / incident part,
When the stray light prevention unit prevents the first light as stray light from entering from the endoscope side exit / incident part, the stray light prevention part is provided in the endoscope side exit / incident part,
The endoscope-side connector according to claim 15, wherein when the stray light prevention unit prevents the second light as stray light from entering from the incident part, the stray light prevention part is provided in the incident part.
The endoscope side connector according to claim 15, wherein the stray light preventing unit is provided between the emitting unit and the incident unit, and the light source side projecting unit and the endoscope side projecting unit.
The first light for illumination or treatment is incident on the incident portion,
The endoscope-side connector according to claim 26, wherein the endoscope-side exit / incident part emits the second light for information transmission.
The first light for treatment is incident on the incident portion,
The endoscope-side connector according to claim 26, wherein the second light for illumination is incident on the endoscope-side exit / incident part.
An optical connector for an endoscope having a light source side connector provided in a light source device and an endoscope side connector provided in an endoscope that is detachable from the light source side connector,
The light source side connector is provided with an emission part for emitting the first light,
The first light emitted from the emission unit is provided in the endoscope side connector, optically connected to the emission unit when the endoscope side connector is connected to the light source side connector, and An incident part that is incident;
An endoscope side exit / incident part that is provided in the endoscope side connector and emits second light having optical characteristics different from that of the first light or is incident on the second light;
Provided in the light source side connector, and when the endoscope side connector is connected to the light source side connector, optically connected to the endoscope side exit / incident part, from the endoscope side exit / incident part A light source side entrance / exit part that emits the second light toward the endoscope side exit / incidence part, or the emitted second light enters;
Intrusion of the first light as stray light from the light source side entrance / exit part, intrusion of the first light as stray light from the endoscope side exit / incidence part, and emission of the second light as stray light A stray light prevention unit for preventing at least one of intrusion from a part and intrusion from the incident part of the second light as stray light,
An optical connector for an endoscope comprising: