JP2017074267A - Inspection equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide inspection equipment that enables an inspection object to be observed by observing reflection light of the inspection object with eyes, instead of by an image by an imaging device such as a CCD camera, and enables an illumination light quantity to be adjusted reliably, and that can be adjusted to a desired length.SOLUTION: Inspection equipment 1 includes a plurality of relay lens units 3 configured so as to be mutually connected, an eyepiece lens unit 4 configured so as to be connected to a base end part of the plurality of relay lens units 3, and an objective lens unit 2 configured so as to be able to be connected to the tip of the plurality of relay lens units 3. The objective lens unit 2 includes an illumination lamp 15 for emitting illumination light, a battery 17 for supplying electric power to the illumination lamp 15, and a control board 19 for adjusting an illumination light quantity of the illumination lamp 15 according to received infrared light.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inspection apparatus, and more particularly, to an inspection apparatus whose length can be changed.

  Conventionally, inspection apparatuses such as industrial endoscopes have been widely used. For example, Japanese Patent Laid-Open No. 1-196545 proposes an in-hole surface inspection device for surface inspection of the center hole of a turbine rotor.

  In the proposed apparatus, an image of the examination site is acquired by a CCD TV camera provided at the tip, and the examiner can perform an examination by looking at the image displayed on the monitor. Such an apparatus can be used for inspection of inner surfaces such as holes formed in various inspection objects.

  A rigid endoscope configured by connecting a plurality of cylindrical portions having relay lenses is also known. By adjusting the number of tube portions, the length of the insertion portion of the rigid endoscope can be adjusted according to the inspection object. In the rigid endoscope, a power source for illumination is disposed on the hand side, and power from the power source is supplied to the illumination unit at the distal end portion via wiring provided in each cylinder unit.

Japanese Patent Laid-Open No. 01-196545

  However, in the case of the apparatus proposed in the above-mentioned Japanese Patent Application Laid-Open No. 1-196545, in response to a request to visually observe the reflected light of the inspection object that has passed through the optical system, not the image by the CCD camera. Can not respond.

  Further, in the case of the apparatus proposed in the above-mentioned Japanese Patent Application Laid-Open No. 1-196545, an image for processing an image of a moving device such as a pulley or an electric winch for winding and feeding a pulling cable for pulling the inspection apparatus main body and a CCD camera. There is also a problem that a processing unit and a TV monitor for displaying an image are also required, resulting in a large inspection system.

  Further, in the case of a rigid endoscope in which a plurality of cylindrical portions having the relay lens described above are connected, the length of the insertion portion of the rigid endoscope can be adjusted, but the wiring provided in each cylindrical portion is connected. The electric power from the power source on the hand side is supplied to the illumination unit at the tip by the contact between the wirings of the adjacent cylinders and the contacts provided on the cylinders. For this reason, there is a problem in that the illumination may not be turned on due to contact deterioration, contact failure, or the like, or the illumination may become dark, making it impossible to adjust the amount of light appropriately.

  Therefore, the present invention provides an inspection device that can visually observe the reflected light of the inspection object, not the image obtained by an imaging device such as a CCD camera, can adjust the light amount of illumination reliably, and can be adjusted to a desired length. The purpose is to provide.

  According to one aspect of the present invention, one or more relay lens units configured to be connectable to each other, and an eyepiece unit configured to be connectable to a base end portion of the one or more relay lens units An objective lens unit configured to be connectable to a distal end portion of the one or more relay lens units; an illumination unit provided in the objective lens unit that emits illumination light; and the objective lens unit or connected thereto A first power source that is provided in a state-of-the-art relay lens unit of two or more relay lens units and that supplies power to the illumination unit; and a receiving unit that is provided in the objective lens unit and provided in the objective lens unit In response to the electromagnetic wave signal received by the sensor or a physical quantity signal detected by a sensor provided in the objective lens unit. It is possible to provide an inspection apparatus having an illumination adjusting unit to adjust the amount of light, a.

  According to the present invention, there is provided an inspection apparatus capable of observing reflected light of an inspection target with an eye, not an image obtained by an imaging apparatus such as a CCD camera, and capable of reliably adjusting the amount of illumination light and adjusting to a desired length. Can be provided.

It is sectional drawing which shows the structure of the inspection apparatus concerning the 1st Embodiment of this invention. It is a block diagram for demonstrating the structure of the control board 19 concerning the 1st Embodiment of this invention. It is a figure which shows the optical system of the objective lens unit 2, the relay lens unit 3, and the eyepiece lens unit 4 concerning the 1st Embodiment of this invention. FIG. 2 is a front view of a glass plate provided with a field stop and an LED 47 built in the eyepiece unit 4 according to the first embodiment of the present invention. The partial cross section of the objective lens unit 2 provided with a plurality of photodiodes 22 so that the light receiving surface of each photodiode 22 is directed in the inner diameter direction of the cylindrical connecting tube 12 according to the first embodiment of the present invention. FIG. FIG. 2 is a diagram showing an optical system in the case where a plurality of LEDs 47 are provided in a ring shape on a circular glass plate 51 and one photodiode 22 is provided in the objective lens unit 2 according to the first embodiment of the present invention. . FIG. 5 is a perspective view showing another configuration for providing a plurality of LEDs 47 and emitting light from the LEDs 47 in a ring shape, according to the first embodiment of the present invention. FIG. 3 is a perspective view showing a configuration for emitting light from one LED 47 in a ring shape without providing a plurality of LEDs 47 according to the first embodiment of the present invention. It is a perspective view which shows the modification of the structure of FIG. It is a figure which shows the optical system in the case of receiving the infrared light from the infrared rays emission apparatus 49 concerning the 1st Embodiment of this invention with the photodiode 22 provided in the most advanced relay lens unit 3. FIG. It is a fragmentary sectional view of the objective-lens unit of the inspection apparatus of the modification 1 of the 1st Embodiment of this invention. It is the figure seen from the front end side of the objective lens unit of the inspection apparatus of the modification 1 of the 1st Embodiment of this invention. It is sectional drawing which shows the structure of the inspection apparatus 1A concerning the modification 2 of the 1st Embodiment of this invention. It is a fragmentary sectional view of 2 C of objective lens units concerning the modification 3 of the 1st Embodiment of this invention. It is sectional drawing which shows the structure of the eyepiece unit 4A of the test | inspection apparatus concerning the modification 4 of the 1st Embodiment of this invention. It is the figure which looked at the eyepiece unit 4A of FIG. 14 from the base end side. It is a partial expanded sectional view of the movable mechanism 91 in connection with the modification 4 of the 1st Embodiment of this invention. It is a perspective view which shows the structure of the eyepiece unit 4B of the test | inspection apparatus concerning the modification 5 of the 1st Embodiment of this invention. It is the figure which looked at the eyepiece unit 4B of FIG. 17 from the base end side. It is sectional drawing which shows the structure of the inspection apparatus 1B concerning the modification 6 of the 1st Embodiment of this invention. It is sectional drawing which shows the structure of the inspection apparatus 1C concerning the modification 7 of the 1st Embodiment of this invention. It is sectional drawing which shows the structure of inspection apparatus 1D concerning the modification 8 of the 1st Embodiment of this invention. It is sectional drawing which shows the structure of the test | inspection apparatus 1E at the time of making it pass in the test | inspection apparatus regarding the modification 9 of the 1st Embodiment of this invention. It is sectional drawing which shows the structure of the test | inspection apparatus 1F at the time of making the infrared-light pass in the test | inspection apparatus regarding the modification 10 of the 1st Embodiment of this invention. It is sectional drawing which shows the structure of the test | inspection apparatus 1G at the time of making it let the infrared light pass in the test | inspection apparatus regarding the modification 11 of the 1st Embodiment of this invention. FIG. 25 is a sectional view taken along line XXV-XXV in FIG. 24. It is sectional drawing which shows the structure of the inspection apparatus concerning the modification 12 of the 1st Embodiment of this invention. It is sectional drawing which shows the structure of the test | inspection apparatus 1H at the time of making infrared light pass in the test | inspection apparatus regarding the 2nd Embodiment of this invention. It is a perspective view of the board | substrate 22b of the objective lens unit 2J in connection with the 2nd Embodiment of this invention. It is a timing chart which shows the increase / decrease in the acceleration in the XYZ direction of the acceleration sensor 171 accompanying rotation of the test | inspection apparatus 1H in connection with the 2nd Embodiment of this invention, and a light quantity. It is sectional drawing which shows the structure of the test | inspection apparatus 1I at the time of letting the air pass in the test | inspection apparatus regarding the modification 1 of the 2nd Embodiment of this invention. FIG. 30 is a cross-sectional view of the inspection apparatus 1I taken along line XXX-XXX in FIG. 29. It is sectional drawing which shows the structure of the objective lens unit 2L in connection with the modification 2 of the 2nd Embodiment of this invention. It is sectional drawing which shows the structure of the objective lens unit 2M in connection with the modification 2 of the 2nd Embodiment of this invention. It is a fragmentary sectional view of objective lens unit 2G which makes it know that there is little battery residual quantity concerning the modification of the 1st and 2nd embodiment of the present invention. It is a perspective view of the ring-shaped board | substrate 22c with which several photodiode 22 and several LED are mounted regarding the modification of the 1st and 2nd embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a cross-sectional view showing a configuration of an inspection apparatus according to the present embodiment.

  The inspection apparatus 1 according to the present embodiment is a borescope that includes an objective lens unit 2, a relay lens unit 3, and an eyepiece unit 4. A plurality of relay lens units 3 can be connected as shown by a two-dot chain line.

  The objective lens unit 2 and the relay lens unit 3 can be connected. The relay lens unit 3 and the eyepiece unit 4 can also be connected. The inspection apparatus 1 is a rigid endoscope configured by connecting an objective lens unit 2, one or more relay lens units 3, and an eyepiece unit 4.

That is, the inspection apparatus 1 includes one or more relay lens units 3 configured to be connectable to each other, and an eyepiece unit 4 configured to be connectable to a base end portion of the one or more relay lens units 3. The objective lens unit 2 is configured to be connectable to the tip of one or more relay lens units 3.
(Configuration of objective lens unit)
The objective lens unit 2 includes a cylindrical body 11, a connecting pipe 12, a lid 13, and a lens frame body 14. The cylinder 11 is made of metal such as stainless steel. The connecting pipe 12 is fixed to the cylindrical body 11 by fixing means such as a screw. A concave portion 11a having a tapered surface is formed in the central portion of the cylindrical body 11, and an opening portion 11b is formed in the concave portion 11a. An illumination lamp 15 and a prism 16 are disposed in the opening 11b.
The objective lens unit 2 has an elongated shape, and acquires an image of the subject from the side of the elongated shape.

The cylindrical body 11 is formed with a concave portion 11c for accommodating the battery 17, and a lid 18 for closing the concave portion 11c is detachable for battery replacement.
A control board 19 for controlling the illumination lamp 15 is disposed inside the lid 13 provided and fixed on the distal end side of the cylindrical body 11. The control board 19 is equipped with a control circuit for turning on / off the illumination lamp 15 and adjusting the amount of light, and the illumination lamp 15 and the battery 17 are connected by a lead wire 20. The illumination lamp 15 is an illuminator having a light emitting element such as a light emitting diode (LED). That is, the illumination lamp 15 is provided in the objective lens unit 2 and constitutes an illumination unit that emits illumination light. The battery 17 is a power source that is provided in the objective lens unit 2 and supplies power to the illumination lamp 15.

A lens frame body 14 is provided inside the cylinder body 11 and the connecting pipe 12. A plurality of objective lenses 21 are fixed to the lens frame 14.
The subject is illuminated by the illumination lamp 15, and the reflected light from the subject incident from the side surface side of the cylindrical body 11 is reflected by the prism 16 and travels toward the proximal end of the cylindrical body 11, and reaches a plurality of objective lenses 21. Incident light is emitted toward the proximal end of the cylindrical body 11, that is, toward the eyepiece unit 4.

  The lens frame 14 has a cylindrical shape, and a photodiode 22 serving as an optical sensor that receives infrared light, which is an electromagnetic wave signal, is disposed at a concentric position on the circular base end surface of the lens frame 14. A plurality are provided. The plurality of photodiodes 22 are mounted on a ring-shaped substrate 22 a and are arranged in a ring shape so as to receive infrared light from the base end direction of the cylindrical body 11. That is, the plurality of photodiodes 22 are provided inside the objective lens unit 2 and constitute an electromagnetic wave signal receiving unit that receives infrared light that is an electromagnetic wave signal.

As will be described later, each photodiode 22 is disposed at a position that does not fall within the user's field of view when the user who is an examiner views the subject from the eyepiece unit 4.
The ring-shaped substrate 22a also functions as a flare stop, and a non-reflective black paint is applied to the front surface 22a1 of the substrate 22a.

  The flare stop member may be provided as a separate member from the substrate 22a, but here, the substrate 22a is also provided with a function of flare stop so that the number of parts of the objective lens unit 2 is reduced.

FIG. 2 is a block diagram for explaining the configuration of the control board 19.
The control board 19 has a control circuit 19a and an input circuit 19b. A plurality of photodiodes 22 are connected to the input circuit 19b, and the input circuit 19b receives the output signal of each photodiode 22 and supplies it to the control circuit 19a. Each photodiode 22 and the control board 19 are connected by a lead wire (not shown).
As will be described later, each photodiode 22 receives infrared light of a light amount adjustment signal that instructs to increase or decrease the amount of light emitted from the illumination lamp 22. Each photodiode 22 outputs an output signal corresponding to the received infrared light to the control circuit 19a.

  When the control circuit 19 a receives an output signal corresponding to the light amount adjustment signal for increasing the light amount from the plurality of photodiodes 22, the control circuit 19 a outputs a lamp driving signal for increasing the light amount of the illumination lamp 15 to the illumination lamp 15. When receiving an output signal corresponding to the light amount adjustment signal for reducing the light amount from the plurality of photodiodes 22, the control circuit 19 a outputs a lamp driving signal for reducing the light amount of the illumination lamp 15 to the illumination lamp 15.

For example, the control circuit 19a has a counter, and a counter value corresponding to the light amount of the illumination lamp 15 is set in the counter. The control circuit 19 a increases or decreases the counter value according to the output signals from the plurality of photodiodes 22, generates a lamp driving signal corresponding to the counter value, and outputs it to the illumination lamp 15.
(Configuration of relay lens unit)
Returning to FIG. 1, the relay lens unit 3 includes three relay lenses 31 a, 31 b, 31 c, a cylindrical body 32, a connection tube 33 for connecting the objective lens unit 2 or another relay lens unit 3, and an eyepiece. A connection pipe 34 for connection with the lens unit 4 or another relay lens unit 3 is provided. The cylinder 32 includes a front cylinder 32a, a rear cylinder 32b, and a connection cylinder 32c that connects and fixes the front cylinder 32a and the rear cylinder 32b. Each member and the connecting pipes 33 and 34 constituting the cylindrical body 32 are made of metal such as stainless steel. The connecting pipes 33 and 34 are fixed to the cylindrical body 32 by fixing means such as screws.

  The front cylinder 32 a has a step at the center, and the front portion of the front cylinder 32 a constitutes a connection base that can be fitted to the proximal end portion of the connection pipe 33.

  A lens frame 33a is fixed to the proximal end portion of the connection pipe 33, and the relay lens 31a is fixed to the lens frame 33a by a fixing member 35a. The rear portion of the connecting tube 33 is fixed so as to be inserted and fitted into the tip portion of the cylindrical body 32 together with the lens frame 33a.

A lens frame 33b is fixed to an inner central portion of the connection cylinder 32c, and a relay lens 31b is fixed to the lens frame 33b by a fixing member 35b.
The proximal end of the front cylinder 32a is inserted into the distal end portion of the connection cylinder 32c, and the distal end of the rear cylinder 32b is inserted into the proximal end portion of the connection cylinder 32c. The front cylinder 32a and the rear cylinder 32b are fixed to the connection cylinder 32c by a fixing means such as a screw or an adhesive so as to be sandwiched between the front cylinder 32a and the rear cylinder 32b.

  A lens frame 33c is fixed to the distal end portion of the connection pipe 34, and a relay lens 31c is fixed to the lens frame 33c by a fixing member 35c. The front portion of the connecting pipe 34 is fixed so as to be inserted and fitted into the base end portion of the cylindrical body 32 together with the lens frame 33c.

The lens frames 33a, 33b, 33c and the fixing members 35a, 35b, 35c are made of metal such as stainless steel.
Each of the relay lenses 31a, 31b, and 31c is a cemented lens in which two lenses are combined, and each of the cemented lenses is a plano-convex lens. The relay lenses 31a and 31c are field lenses, and the relay lens 31b is an imaging lens. The relay lens 31a emits light incident in parallel to the relay lens 31b that is an imaging lens, and the relay lens 31c emits light from the relay lens 31b as parallel light.
As described above, the relay lens unit 3 includes the two field lenses and the imaging lens disposed between the two field lenses, and one of the two field lenses transmits the incident light to the imaging lens. The imaging lens emits the incident light to the other of the two field lenses, and the other of the two field lenses emits the incident light as parallel light.
Here, the relay lens is composed of three cemented lenses that are plano-convex, but is not limited to this configuration.

The front end portion of the relay lens unit 3 is formed so as to be fitted on the base end portion of the relay lens unit 3 so that the plurality of relay lens units 3 can be connected. By dividing the cylindrical body 32 into the front cylindrical body 32a and the rear cylindrical body 32b, the position of the lens of the relay lens unit can be easily set, and adjustment after assembly is facilitated. That is, there is a merit that the position of the lens can be adjusted by making the connecting portion a structure such as a screw. Furthermore, there is an advantage that it is easy to carry by dividing.
(Configuration of eyepiece unit)
The eyepiece unit 4 has a cylindrical body 41 made of metal such as stainless steel, and an eyepiece lens 42 is provided in the cylindrical body 41. A metal connection cap 43 made of metal such as stainless steel is fixed to the distal end side of the cylindrical body 41. The connection cap 43 has a shape in which the proximal end portion of the relay lens unit 3 can be inserted and fitted.

  The eyepiece unit 4 has two switches 44a and 44b for adjusting the amount of illumination light and can be operated by the user. The switch 44a is a switch for instructing an increase in the amount of light of the illumination lamp 15, and the switch 44b is a switch for instructing a decrease in the amount of light of the illumination lamp 15.

  The cylindrical body 41 is formed with a concave portion 41a for accommodating the battery 45, and a lid 46 for closing the concave portion 41a is detachably attached. The user can replace the battery 45 by opening the lid 46.

A light emitting diode (hereinafter referred to as LED) 47 as an infrared light emitting portion is provided at the base end portion of the connection base 43.
Each switch 44 a, 44 b is connected to the control board 48. When the switch 44 a is pressed, the control board 48 has a control circuit that generates an increase pulse signal instructing an increase in the amount of light of the illumination lamp 15 and supplies it to the LED 47. When the switch 44 b is pressed, the control circuit 48 generates a decrease pulse signal that instructs a decrease in the light amount of the illumination lamp 15 and supplies it to the LED 47. The LED 47 emits infrared light IR corresponding to the increase pulse signal or the decrease pulse signal. The infrared light IR is emitted toward the tip of the connection cap 43.

  The infrared light IR from the LED 47 passes through the relay lens unit 3 and is received by one of the plurality of photodiodes 22 of the objective lens unit 2. The control circuit 19a of the objective lens unit 2 adjusts the light quantity of the illumination lamp 15 according to the received infrared light.

  Therefore, the control board 19 is provided in the objective lens unit 2, and in response to the infrared light that is an electromagnetic wave signal received by the plurality of photodiodes 22 that are reception units provided in the objective lens unit 2, An illumination adjustment unit that adjusts the amount of illumination light is configured. The LED 47 is provided in the eyepiece unit 4 and constitutes an electromagnetic wave signal output unit that outputs infrared light that is an electromagnetic wave signal.

  Here, the switches 44 a and 44 b, the battery 45, the LED 47, and the control circuit 48 are provided in the eyepiece lens unit 4, but may not be provided in the eyepiece lens unit 4. For example, as shown by a two-dot chain line in FIG. 1, switches 44 a and 44 b, a battery 45, an LED 47, and a control board 48 are provided in an infrared emitting device 49 such as a remote control unit separate from the eyepiece unit 4. Infrared light IR may be emitted from the vicinity of the eyepiece portion of the lens unit 4 toward the distal end, and incident on the eyepiece lens unit 4.

  Furthermore, in FIG. 1, the cylinder 41 is fixed to the connection base 43, but the cylinder 41 and the connection base 43 are arranged so that the cylinder 41 can rotate around the axis of the connection base 43. And may be configured.

  In that case, the eyepiece 42 is provided in the connection base 43, and the switches 44 a and 44 b, the battery 45, and the control board 48 are built in the cylindrical body 41. The switches 44a and 44b, the battery 45, and the control board 48 are connected to the LED 47 through a slip ring, or the wiring connecting the control board 48 and the LED 47 is lengthened and loosened.

  If the cylindrical body 41 can be rotated around the axis of the connection cap 43, the position of the switches 44a and 44b can be changed even if the user rotates the inspection apparatus 1 around the axis during the inspection. The switches 44a and 44b are easy to operate.

As shown by a two-dot chain line in FIG. 1, a camera 50 as an imaging device having an imaging element such as a CCD image sensor for recording an image can be attached to the eyepiece unit 4.
By arranging the positions where the light emitting diode 47 and the photodiode 22 are arranged concentrically with the same size, signals can be transmitted and received even if the optical axis is slightly shifted.
(Optical system)
Next, the optical system of the inspection apparatus 1 will be described.

  FIG. 3 is a diagram illustrating an optical system of the objective lens unit 2, the relay lens unit 3, and the eyepiece unit 4. FIG. 4 is a front view of a glass plate provided with a field stop and an LED 47 built in the eyepiece unit 4.

  In FIG. 3, FP indicates the image plane of the objective lens unit 2 and each relay lens unit 3. The optical image formed on each image plane is transmitted by the relay lens unit 3 and transmitted to the eyepiece unit 4.

A circular glass plate 51 provided in the eyepiece unit 4 is provided with a reticle having a scale 52. A field stop 53 is provided on the front end side of the glass plate 51, that is, on the relay lens side. FIG. 4 is a view of the glass plate 51 as viewed from the front end side.
As shown in FIG. 4, the LED 47 is disposed outside the edge 53 a of the stop through which the light from the field stop 53 passes.

Light from the subject passes through a plurality of objective lenses 21 in the objective lens unit 2, and subsequently passes through three relay lenses 31 a, 31 b, and 31 c in each relay lens unit 3, and the field stop 53 of the eyepiece unit 4. Through the opening inside. The LED 47 is provided outside the field of view.
Infrared light, which is an electromagnetic wave emitted from the LED 47, enters the base end portion of the objective lens unit 2 through the plurality of relay lens units 3.

When there is one LED 47, the position of the infrared light incident on the base end portion of the objective lens unit 2 differs depending on the number of relay lens units 3 and the direction at the time of connection.
Therefore, here, the plurality of photodiodes 22 are provided in a ring shape so as to reliably receive infrared light regardless of the number of connected relay lens units 3.

In the case of FIG. 3, the photodiode 22 is provided in the objective lens unit 2 so that the light receiving surface of the photodiode 22 faces the base end direction of the optical axis O.
Therefore, the infrared light output from the LED 47 serving as the electromagnetic wave signal output unit passes through the relay lens inside the plurality of relay lens units 3 and is received by the plurality of photodiodes 22 serving as the electromagnetic wave signal receiving unit.
The photodiode 22 may be provided in the objective lens unit 2 so as to face in a direction substantially orthogonal to the base end direction of the optical axis O.

  FIG. 5 is a partial cross-sectional view of the objective lens unit 2 provided with a plurality of photodiodes 22 so that the light receiving surfaces of the photodiodes 22 face the inner diameter direction of the cylindrical connecting tube 12.

  As shown in FIG. 5, the plurality of photodiodes 22 are arranged along the inner peripheral surface of the connection tube 12 so that the light receiving surface of each photodiode 22 faces the inner diameter direction of the cylindrical connection tube 12. .

  Further, the ring-shaped member 12 </ b> A is fixed to the inner peripheral surface 12 a of the connection pipe 12. The ring-shaped member 12A has a reflecting surface 12Aa that is a ring-shaped inclined surface that reflects light from the base end direction toward the light receiving surfaces of the plurality of photodiodes 22 as indicated by alternate long and short dash lines. Yes.

Furthermore, the ring-shaped member 12A may have a flare stop function, and in this case, the tip-side surface 12Ab is coated with a black paint for preventing reflection.
In addition, a plurality of LEDs 47 of the eyepiece unit 4 may be arranged in a ring shape so that one photodiode 22 of the objective lens unit 2 is provided.

  FIG. 6 is a diagram showing an optical system in the case where a plurality of LEDs 47 are provided in a ring shape on a circular glass plate 51 and one photodiode 22 is provided in the objective lens unit 2. The plurality of LEDs 47 are provided on the field stop 53 along a circle indicated by a two-dot chain line in FIG.

Since the plurality of LEDs 47 are provided in a ring shape, the objective lens unit 2 may be provided with at least one photodiode 22.
In the case where a plurality of LEDs 47 are provided, infrared light may be emitted as parallel light using a lens.

FIG. 7 is a perspective view showing another configuration for providing a plurality of LEDs 47 and emitting light from the LEDs 47 in a ring shape.
A plurality of LEDs 47 are provided on the base end surface of the transparent cylindrical transparent member 61. The material of the transparent member 61 is glass, acrylic, polycarbonate, or the like.

A plurality of lenses 62 are provided on the front end surface of the transparent member 61 so as to correspond to the plurality of LEDs 47. Each lens 62 is a plano-convex lens. Each lens 62 is formed so that the light emitted from each LED 47 is emitted toward the corresponding lens 62 and is emitted as parallel light from the tip surface of the lens 62.
Further, the LED 47 may be arranged so as to be tilted in the direction in which the aperture stop is opened, and there is an advantage that the amount of light passing therethrough increases.

Therefore, the light emitted from the plurality of LEDs 47 passes through the transparent member 61 and is emitted from the plurality of lenses 62 to the front side as parallel light.
Furthermore, ring-shaped light may be emitted without using the plurality of LEDs 47.

FIG. 8 is a perspective view showing a configuration for emitting light from one LED 47 in a ring shape without providing a plurality of LEDs 47.
A notch 63 a is provided in a part of the base end side of the cylindrical transparent member 63, and the LED 47 is fixed to the notch 63 a so that light is emitted into the transparent member 63. The material of the transparent member 63 is glass, acrylic, polycarbonate, or the like.
The front surface of the transparent member 63 is a scattering surface 63b such as polished glass so that light is scattered.

The light emitted from the LED 47 passes through the transparent member 63, is internally reflected by the transparent member 63, and is emitted from the scattering surface 63b. Since the scattering surface 63b is ring-shaped, ring-shaped light is emitted to the front side.
Here, one LED 47 is provided on the transparent member 63, but two or more LEDs may be provided.
Moreover, the cylindrical transparent member 63 may not have the notch 63a.
FIG. 8A is a perspective view showing a modification of the configuration of FIG. That is, both end surfaces 63Aa and 63Ab of the cylindrical transparent member 63A are scattering surfaces such as polished glass so that the light is scattered, and the LED 47 is fixed to the end surface 63Aa so that the light is emitted into the transparent member 63A. Is done. The light from the LED 47 is scattered at the end faces 63Aa and 63Ab and is emitted from the end face 63Ab in a circular shape toward the front side.
In the case of FIG. 8A, two or more LEDs 47 may be provided on the end face 63Aa.

In the case of FIG. 6, since there is one photodiode 22 of the objective lens unit 2, there is an advantage that the power consumption of the battery 17 can be reduced.
In addition, as described above, when infrared light is directly input to the eyepiece lens of the eyepiece unit 4 using the infrared emitting device 49, the objective lens is set so that a part of the image of the subject does not become vignetting. The photodiode 22 is provided not in the unit 2 but in the most advanced relay lens unit 3.

FIG. 9 is a diagram showing an optical system in the case where the infrared light from the infrared emitting device 49 is received by the photodiode 22 provided in the state-of-the-art relay lens unit 3.
Infrared light emitted from the infrared emitting device 49 enters the eyepiece 42 through a brightness stop (not shown) of the eyepiece unit 4. The infrared light emitted from the infrared emitting device 49 passes through the inside of the plurality of relay lens units 3 and forms an image on the imaging surface of the objective lens unit 2, but the photodiode 22 is the most advanced relay lens unit. 3 is disposed in the vicinity of the relay lens 31b, which is an imaging lens, and receives infrared light.
In that case, the power source of the photodiode 22 of the state-of-the-art relay lens unit 3 can be obtained from the battery 17 of the object-lens unit 2, and the contacts 2a and 3a are respectively connected to the object lens unit 2 and the state-of-the-art relay lens unit 3. Is provided. That is, the battery 17 is a power source that is provided in the most advanced relay lens unit 3 among the one or more connected relay lens units 3 and supplies power to the illumination lamp 15.
(Function)
For example, the inspection apparatus 1 is inserted from the objective lens unit 2 into a center hole formed along an axis passing through the rotation center such as a turbine rotor.

  The number of relay lens units 3 is adjusted according to the depth of the hole into which the inspection apparatus 1 is inserted, that is, the length of the center hole, and one or more relay lenses are provided at the base end of the objective lens unit 2. The inspection apparatus 1 is assembled by connecting and fixing the unit 3 and connecting and fixing the eyepiece lens unit 4 to the proximal end portion of the most proximal relay lens unit 3.

  The user can observe the inner surface of the center hole by operating the switch 44a or 44b while viewing an endoscopic image displayed on a monitor (not shown) to set the amount of illumination light to an appropriate value.

  A battery 17 that is a power source of the illumination lamp 15 and a control circuit 19 a for adjusting the amount of light of the illumination lamp 15 are provided in the objective lens unit 2. When the user operates the switches 44a and 44b of the eyepiece unit 4 at hand, the light amount adjustment signal is transmitted to the control circuit 19a that adjusts the light amount of the illumination light of the objective lens unit 2 by wireless infrared rays, and the illumination lamp 15 The amount of light can be adjusted.

Therefore, since the objective lens unit 2, one or two or more relay lens units 3 and the eyepiece lens unit 4 are connected in series and the power supply and the illumination control signal are not sent by the lead wires through the plurality of contacts, The instruction signal is reliably transmitted to the objective lens unit 2.
According to the above-described embodiment, the reflected light of the inspection object, not the image obtained by the imaging device such as a CCD camera, can be observed with the eyes, the light amount of the illumination can be reliably adjusted and adjusted to a desired length. An inspection device can be provided.

Hereinafter, modifications of the above-described embodiment will be described. The configuration of the inspection apparatus of each modified example is substantially the same as the configuration of the inspection apparatus 1 of the above-described embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted. Only differences from the configuration of the inspection apparatus of each modification will be described. In each modification, the same components as those in the other modifications are denoted by the same reference numerals and description thereof is omitted, and only differences from the configuration of the above-described embodiment and the inspection apparatus of each modification will be described.
(Modification 1)
In addition, although the inspection apparatus of embodiment mentioned above is a side view type, the inspection apparatus of this modification 1 may be a direct view type.

FIG. 10 is a partial cross-sectional view of the objective lens unit of the inspection apparatus according to the first modification. FIG. 11 is a view seen from the front end side of the objective lens unit of the inspection apparatus according to the first modification.
The objective lens unit 2A includes a cylindrical body 11A, a connecting pipe 12A, and a lens frame 14A. The cylinder 11A is made of metal such as stainless steel. A concave portion 11d is formed on the distal end side of the cylindrical body 11A, and an opening portion 11b1 is formed in the concave portion 11d.

  As shown in FIG. 11, in the recess 11d, a plurality of LEDs 15A as an illuminating unit, here three, are arranged at equal intervals so as to surround the opening 11b1. Each LED 15A is mounted on the substrate 15A1 and disposed in the recess 11d so as to illuminate the front.

  On the front side of the cylindrical body 11A, a rod lens 16A is disposed so that the central axis coincides with the central axis of the cylindrical body 11A. The distal end surface of the rod lens 16A is located at the opening 11b1 and constitutes an observation window. That is, the objective lens unit 2A has an elongated shape, and acquires an image of the subject from the front of the elongated shape.

  The cylindrical body 11A is formed with a plurality of three recesses 11c1 that house three, here three batteries 17A. Three lids 18A are detachably provided on the distal end side of the cylindrical body 11A. Each battery 17A can be mounted and removed by opening and closing each lid 18A.

  A lens frame 14A to which a plurality of objective lenses 21 are fixed is provided inside the rear side of the cylindrical body 11A.

  The reflected light from the subject incident from the distal end side of the cylindrical body 11A enters the rod lens 16A, proceeds in the proximal direction of the cylindrical body 11A, enters the plurality of objective lenses 21, and the proximal end of the cylindrical body 11A. Exit in the direction.

A ring-shaped substrate 22a on which a plurality of photodiodes 22 are mounted is provided on the base end side of the cylindrical body 11A.
The three batteries 17A correspond to the battery 17 described above, and the three LEDs 15A correspond to the illumination lamp 15 described above.

In FIG. 10, the control board 19 indicated by dotted lines is connected to the plurality of photodiodes 22 and the three LEDs 15 </ b> A, and the three LEDs 15 </ b> A are turned on / off and the light amount is adjusted according to the outputs of the plurality of photodiodes 22.
(Modification 2)
In the above-described embodiment and each modified example, the battery is built in the objective lens unit 2, but in this modified example, the battery is held on the distal end side of the most advanced relay lens unit 3, and the objective lens unit. It is comprised so that it may be arrange | positioned in.

FIG. 12 is a cross-sectional view showing a configuration of an inspection apparatus 1A according to the second modification.
In the inspection apparatus 1A of the second modification, a plurality of, here, two battery housing portions 71 are provided on the distal end side of the most advanced relay lens unit 3a. The distal end portion of the relay lens unit 3a provided with the battery housing portion 71 has a shape that can be inserted so as to fit into the recess 2Ba on the proximal end side of the objective lens unit 2B. The plurality of photodiodes 22 are mounted on a ring-shaped substrate 22 a and are arranged so as to receive infrared light from the base end direction of the cylindrical body 11.

A plurality of contacts 72 for power supply and output of the photodiode 22 are provided on the distal end side of the battery housing portion 71 of the relay lens unit 3a.
In the recess 2Ba on the base end side of the objective lens unit 2B, a ring-shaped substrate 73a in which a plurality of contacts 73 are arranged in a ring shape is provided.

When the distal end portion of the relay lens unit 3a is fitted into the concave portion 2Ba on the proximal end side of the objective lens unit 2B, the plurality of contacts 72 come into contact with the plurality of contacts 73, respectively.
The plurality of contacts 73 are connected to the control board 19 by lead wires 20. The LED 15 a is also connected to the control board 19 by a lead wire 20. Therefore, the control board 19 receives the power from the battery 17 and drives the photodiode 22 and the LED 15a.

Therefore, even in such a configuration, the battery 17 is provided in the state-of-the-art relay lens unit 3a. However, the battery 17 is disposed in the objective lens unit 2B, and the same effect as in the above-described embodiment is produced.
In the case of the configuration as in Modification 7 described later, as shown by a dotted line in FIG. 12, a photodiode 22 may be provided on the lid 13 so that infrared light from the distal end direction can be received.
(Modification 3)
In the above-described embodiments and modifications, the light amount is adjusted using infrared light as an electromagnetic wave signal, but laser light may be used.

FIG. 13 is a partial cross-sectional view of the objective lens unit 2C according to the third modification.
The objective lens unit 2C includes a prism 81. The prism 81 includes a beam splitter that transmits half of the laser light from the base end side and reflects the remaining half.

A photodiode 83 is disposed on the front end side of the prism 81 via a lens 82.
When the user emits a signal for adjusting illumination light by laser light from the eyepiece unit side toward the distal end side from the laser output device 84 indicated by a two-dot chain line, the laser light is photon The control circuit 19a of the control board 19 receives the light from the diode 83 and adjusts the amount of illumination light based on the received laser light.
Therefore, laser light may be used instead of infrared light.

If the laser output device 84 is a laser distance measuring device, the reflected light of the laser light emitted from the prism 81 is reflected again by the prism 81 and returns to the laser output device 84.
As a result, the laser output device 84 displays the distance to the subject based on the laser light, so that the user can know the length of the inspection device.

In FIG. 13, the laser output device 84 is a device different from the inspection device 1, but the distance measuring function of the laser output device 84 may be provided in the inspection device 1.
(Modification 4)
In the embodiment and each modification described above, the LED 47 is fixed in the eyepiece unit. However, in the fourth modification, the LED 47 is positioned in the field of view only when the amount of illumination light is adjusted. Also good.

FIG. 14 is a cross-sectional view illustrating a configuration of an eyepiece unit 4A of the inspection apparatus according to the fourth modification. FIG. 15 is a view of the eyepiece unit 4A as seen from the base end side.
The eyepiece unit 4 </ b> A is provided with a movable mechanism 91 for the LED 47. The movable mechanism 91 has a shaft portion 92 with the LED 47 fixed at the tip, a button 93 provided on the proximal end side of the shaft portion 92, and a compression spring 94 as a biasing member that biases the button 93. Yes.

  The eyepiece unit 4A has a battery chamber 96 for the battery 95 for the LED 47. The battery 95 can be replaced by opening a lid 97 that covers the battery chamber 96.

Furthermore, as shown in FIG. 14, the eyepiece unit 4 </ b> A includes a lens unit 99 that includes a plurality of eyepieces 98.
FIG. 16 is a partial enlarged cross-sectional view of the movable mechanism 91. Two contact pieces 101 a and 101 b that are electrically connected to the two ends of the battery 95 are fixed to a predetermined position with respect to the cylindrical body 41.

  Two contact pieces 102 a and 102 b are fixed to the shaft portion 92 at predetermined positions, and the two contact pieces 102 a and 102 b are electrically connected to the LED 47 by a lead wire 103.

  When the button 93 is not pressed, the button 93 is in a position indicated by a two-dot chain line by the spring force of the compression spring 94, and the two contact pieces 101a and 101b are in contact with the two contact pieces 102a and 102b. Absent. At this time, the power of the battery 95 is not supplied from the lead wire 103 to the LED 47.

  When the button 93 is pressed and the shaft portion 92 moves from the position indicated by the two-dot chain line to the position indicated by the solid line, the button 93 is at the position indicated by the solid line against the spring force of the compression spring 94. At this time, the two contact pieces 102a and 102b are disposed on the shaft portion 92 so that the two contact pieces 101a and 101b come into contact with the two contact pieces 102a and 102b. Therefore, when the button 93 is pressed, the power of the battery 95 is supplied to the LED 47 from the lead wire 103 to emit light.

As shown in FIG. 15, when the button 93 is not pressed, the LED 47 is located outside the field of view when looking into the eyepiece lens 98, and when looking into the eyepiece lens 98 when the button 93 is pressed The LED 47 is located within the field of view.
As described above, in the present modification, the LED 47 serving as the electromagnetic wave signal output unit is movable from outside the field of view of the eyepiece unit 4A. For this purpose, the eyepiece unit 4A is provided with a button 93 as an operation unit. By operating the button 93, the LED 47 moves from outside the field of view of the eyepiece unit 4A into the field of view.
(Modification 5)
In the fourth modification described above, the LED 47 is positioned in the field of view by pressing the button. In the fifth modification, the LED 47 is positioned in the field of view by operating the lever.

FIG. 17 is a perspective view illustrating a configuration of an eyepiece unit 4B of the inspection apparatus according to the fifth modification. FIG. 18 is a view of the eyepiece unit 4B as seen from the base end side.
An operation lever 111 is attached to the cylindrical body 41 of the eyepiece unit 4B so as to be rotatable around a predetermined shaft member 112. The shaft member 112 may be a convex portion provided on the surface of the operation lever 111.

  The operation lever 111 has a substantially square shape. An LED mounting portion 111 a provided with a plurality of LEDs 47 is formed on one of the substantially square shapes of the operation lever 111. A battery 95 for the plurality of LEDs 47 is provided in the cylindrical body 41.

The other substantially rectangular shape of the operation lever 111 is formed so as to protrude to the outside of the cylinder 41 and constitutes an operation unit 111b operated by the user. The operation unit 111b as the operation unit has an arc shape as shown in FIG. 17, and a slit 41a through which the operation unit 111b can pass is formed in the cylindrical tube body 41.
One end of a tension spring 113 is connected to the operation unit 111b. The other end of the tension spring 113 is connected to a fixed portion 114 provided on the outer peripheral portion of the cylindrical body 41. The operation unit 111b is always pulled in a predetermined direction by a tension spring 113.

  In a state where the operation portion 111b is pulled by the tension spring 113, the LED mounting portion 111a provided with the plurality of LEDs 47 of the operation lever 111 is out of the field of view when looking into the eyepiece lens 98 as shown in FIG. The LED 47 is located.

When the operation portion 111b is operated in the direction indicated by the arrow B against the pulling force of the tension spring 113, the operation lever 111 rotates about the axis of the shaft member 112, and the LED mounting portion 111a is moved to the eyepiece. It is located in the field of view when looking into 98.
(Modification 6)
In the embodiment described above, the infrared light passes through the relay lens unit 3 and is received by the photodiode 22 provided in the objective lens unit 2. In the sixth modification, the infrared light is relayed. The light is received by a photodiode 22 provided on the outer periphery of the objective lens unit 2 without passing through the inside of the lens unit 3.

FIG. 19 is a cross-sectional view illustrating a configuration of an inspection apparatus 1B according to the sixth modification. In FIG. 19, the relay lens unit 3 is indicated by a two-dot chain line.
In the inspection apparatus 1B according to the sixth modified example, the LED 47 is provided on the distal end side outside the cylindrical body 41 of the eyepiece unit 4C. The photodiode 22 is provided on the outer periphery of the objective lens unit 2.

Therefore, the infrared light IR emitted from the LED 47 is incident on the photodiode 22 directly or after being reflected by the inner peripheral surface IS of the subject.
As described above, in the sixth modification, the photodiode 22 that is an electromagnetic wave signal receiving unit that receives an electromagnetic wave signal is provided outside the objective lens unit 2 and is output from the LED 47 to be outside the plurality of relay lens units 3. The electromagnetic wave signal that passed through is received.
(Modification 7)
In the modified example 6, infrared light is received by a photodiode provided on the outer peripheral portion of the objective lens unit 2, but in the modified example 7, in the case of inspecting a pipe line through which the tip passes. Infrared light passing through the inside or outside of the inspection object is reflected by a mirror provided on the distal end side of the pipe and received by a photodiode provided in the objective lens unit 2.

  FIG. 20 is a cross-sectional view illustrating a configuration of an inspection apparatus 1C according to the seventh modification. The inspection target is a penetrating pipe line, and the tip side is open. A plurality of moving mechanisms 121 for moving in the pipe OB1 are attached to the inspection apparatus 1C.

  Each moving mechanism 121 has a ring shape so as to be positioned on the axis of the pipe OB1 of the inspection apparatus 1C, and is configured to be movable in the axial direction of the pipe OB1 and a support mechanism that supports the inspection apparatus 1C. A centering device having a plurality of rollers. A plurality of moving mechanisms 121 are attached at predetermined intervals along the axial direction of the inspection apparatus 1C, and the inspection apparatus 1C is inserted into the pipe OB1. Each moving mechanism 121 is a support device that supports the plurality of relay lens units 3 with respect to the inspection target.

  Infrared light is emitted from an infrared light emitting device 122 operated by a user. The infrared light emitting device 122 has an LED that emits infrared light. The infrared light emitting device 122 is provided with a switch 44a or 44b (not shown) for increasing or decreasing the amount of illumination light. The photodiode 22 is provided on the front end surface of the objective lens unit 2E.

  A reflection device 123 having two mirrors 123a and 123b is installed on the distal end side of the pipe OB1. The reflecting device 123 reflects the light from the base end side of the pipe line OB1, and the two mirrors 123a and 123b are directed from the front end side to the base end side of the pipe line OB1 along the axial direction of the pipe line OB1. The reflecting surfaces 122a1 and 123b1 are arranged.

When the user who is an inspector operates the infrared light emitting device 122 to emit infrared light from the proximal end side of the pipe OB1 toward the reflecting device 123, the photodiode 22 receives the infrared light. be able to.
That is, the photodiode 22 is provided outside the objective lens unit 2E so as to receive infrared light reflected by a mirror provided on the tip side of the objective lens unit 2E. Infrared light from the LED 47 is received by the photodiode 22 via a plurality of moving mechanisms 121 which are support devices that support the plurality of relay lens units 3.
Therefore, the user can increase or decrease the amount of illumination light of the illumination unit of the objective lens unit 2 by operating the infrared light emitting device 122.

  Note that infrared light may pass through the pipe OB1. In FIG. 20, as indicated by the dotted line, a gap 121a is provided in each moving mechanism 121 so that infrared light can pass from the base end side of the pipe line OB1 to the tip side, and the user can move from the base end side of the pipe line OB1. Infrared light is emitted from the infrared light emitting device 122 toward the pipe OB1.

The reflecting surfaces 123a1 and 123b1 of the two mirrors 123a and 123b reflect the infrared light from the gap 121a of each moving mechanism 121, and the proximal side from the distal end side of the pipeline OB1 along the axial direction of the pipeline OB1. As shown by dotted lines, the reflecting surfaces 123a1 and 123b1 of the two mirrors 123a and 123b are arranged.
Even with such a configuration, it is possible to increase or decrease the amount of illumination light of the illumination unit of the objective lens unit 2E by operating the infrared light emitting device 122 without passing infrared light through the inspection device 1C.

Furthermore, when the reflecting device 123 cannot be installed on the distal end side of the pipe line OB1, the photodiode 22 may be disposed at a position where infrared light from the gap 121a of the moving mechanism 121 can be received. In that case, in FIG. 20, the photodiode 22 is disposed at a position on the side surface of the objective lens unit 2 </ b> E where infrared light from the gap 121 a can be received, as indicated by a two-dot chain line. That is, infrared light that is an electromagnetic wave signal is received by the photodiode 22 through the gaps 121a formed in the plurality of moving mechanisms 121 that are support devices.
In addition, in a subject whose tip side is open, not only can the amount of light be changed from the hand side, but also a person other than the person observing the object to be inspected is used by the infrared light emitting device 122 in the case of inspection by a plurality of persons. The amount of light may be changed by applying light from the front end side of the subject to the photodiode 22.
(Modification 8)
In the modified example 7 described above, when infrared light is passed through the conduit, the infrared light passes through the gap 121a of the moving mechanism 121. In the modified example 8, a light receiving unit and a light emitting unit are provided in each moving mechanism. It is also possible to irradiate the photodiode 22 of the objective lens unit 2E with infrared light by repeating the reception and emission of the infrared light.

  FIG. 21 is a cross-sectional view showing a configuration of an inspection apparatus 1D according to Modification 8. The inspection target is a penetrated pipe line, and a plurality of moving mechanisms 121 for moving in the pipe line OB1 are attached to the inspection apparatus 1D.

  Each moving mechanism 121 includes a photodiode 131 as an optical sensor that receives infrared light, and an LED 132 as a light emitting unit that emits infrared light. Each moving mechanism 121 has a battery 133 for operating the photodiode 131 and the LED 132. When each photodiode 131 receives infrared light, each moving mechanism 121 controls the photodiode 131 and the light emitting unit 132 so that the same infrared light as the infrared light signal received by the photodiode 131 is emitted from the light emitting unit 132. A control unit (not shown).

  Two or more relay lens units 3 are connected so that infrared light from the light emitting portions 132 of two adjacent moving mechanisms 121 of the inspection apparatus 1D enters the photodiode 131, and from the LEDs 132 of the moving mechanism 121 at the tip. The objective lens unit 2F and the relay lens unit 3 at the tip are connected so that the infrared light enters the photodiode 22.

When the user operates the infrared light emitting device 122 to emit infrared light from the proximal end side of the pipe OB1 toward the photodiode 131 of the most proximal moving mechanism 121, the photodiode of each moving mechanism 121 is emitted. 131 receives infrared light and emits infrared light from the light emitting unit 132. Finally, the photodiode 22 of the objective lens unit 2F receives infrared light having the same signal pattern as the infrared light emitted from the infrared light emitting device 122.
As described above, each moving mechanism 121 that is a support device has a battery 133 as a power source, and infrared light that is an electromagnetic wave signal is received by the most proximal moving mechanism 121. Based on the received infrared light, the same infrared light as the received infrared light is generated and output.
Therefore, the user can increase / decrease the light quantity of the illumination light of the illumination part of the objective lens unit 2F by operating the infrared light emitting device 122.

Here, the user operates the infrared light emitting device 122 to send an infrared illumination control signal to the objective lens unit 2F. However, as shown in FIG. 19, the tube of the eyepiece unit 4C is used. You may make it provide LED47 as a light emission part in the front end side of the outer side of the body 41. FIG. In that case, the eyepiece lens unit 4C and the relay lens unit 3 at the most proximal end are connected so that the infrared light from the LED 47 of the eyepiece lens unit 4C enters the photodiode 131 of the movement mechanism 121 at the most proximal end.
(Modification 9)
In FIG. 21, the photodiode 22 of the objective lens unit 2F is irradiated with infrared light received and emitted by the moving mechanism outside the inspection apparatus 1D. Irradiates the photodiode 22 of the objective lens unit 2 so as to receive and emit light within the inspection apparatus.

  FIG. 22 is a cross-sectional view showing a configuration of the inspection apparatus 1E when infrared light passes through the inspection apparatus. In FIG. 22, only the objective lens unit 2G of the inspection apparatus 1E and the most advanced relay lens unit 3A are shown.

The objective lens unit 2G of the inspection apparatus 1E has a plurality of photodiodes 22 arranged in a ring shape on the base end side.
Each relay lens unit 3A has a plurality of photodiodes 141 at the base end portion and a plurality of LEDs 142 inside the tip end portion. The plurality of photodiodes 141 are mounted on the ring-shaped substrate 141a, and are fixed to the connection pipe 34 of the relay lens unit 3A so as to receive infrared light from the base end side. The plurality of LEDs 142 are mounted on a ring-shaped substrate 142a, and are fixed to the connection tube 33 of the relay lens unit 3A so as to emit infrared light toward the tip side.

  Each relay lens unit 3A controls the photodiode 141 and the LED 142 so that when the photodiode 141 receives infrared light, the same infrared light as the infrared light signal received by the photodiode 141 is emitted from the LED unit 142. A control unit (not shown) is included.

  A plurality of battery accommodating portions 143 a that accommodate a plurality of batteries 143 are provided inside the connection pipe 33 of the relay lens unit 3 </ b> A. Each battery 143 is accommodated in the battery accommodating part 143a. Each battery 143 is in contact with the contact of the substrate 142a and supplies power to each LED 142.

Further, wirings (not shown) are also provided in the lens frames 33a, 33b (not shown) and 33c. A lead wire 143b for supplying a signal and power to a control unit (not shown) is disposed in each relay lens unit 3A. Inner cylinders 32c1 and 32c2 are disposed inside the front cylinder 32a and the rear cylinder 32b so that the lead wire 143b does not loosen in each relay lens unit 3A. It is disposed between the front cylinder 32a and the inner cylinder 32c1, and between the rear cylinder 32b and the inner cylinder 32c2.
That is, a plurality of photodiodes 22 serving as electromagnetic wave signal receiving units are provided inside the objective lens unit 2G and receive infrared light. Each relay lens unit 3A has a battery 143 as a power source, and generates and outputs the same electromagnetic wave signal as the received infrared light based on the received infrared light.

Therefore, when the user operates the two switches 44a and 44b of the eyepiece unit 4 or the infrared light emitting device 122 to output the light amount adjustment signal of the illumination light, the infrared light emitted from the base end side is The infrared light having the same signal as the received infrared light is received from the eyepiece lens unit 4 by each photodiode 141 of the relay lens unit 3A and emitted from the LED 142. Therefore, the light quantity can be adjusted by irradiating the photodiode 22 of the objective lens unit 2G so as to receive and emit infrared light in the inspection apparatus 1E.
(Modification 10)
In the modified example 9, each relay lens unit 3A includes a plurality of photodiodes 141, a plurality of LEDs 142, and a plurality of batteries 143, and each relay lens unit 3A receives and emits infrared light so that an objective lens is obtained. Irradiating to the photodiode 22 of the unit 2G, in this modification 10, each relay lens unit has an optical fiber to receive and emit infrared light.

  FIG. 23 is a cross-sectional view showing the configuration of the inspection apparatus 1F when infrared light passes through the inspection apparatus. FIG. 23 shows only the objective lens unit 2H of the inspection apparatus 1F and the most advanced relay lens unit 3B.

  The objective lens unit 2H of the inspection apparatus 1F has an optical connector 151 on the base end side, and the output of the optical connector 151 is supplied to the control board 19 through a photoelectric conversion element (not shown).

  Each relay lens unit 3B has optical connectors 152 and 153 at the proximal end and the distal end, respectively. The optical connector 152 is mounted on a ring-shaped substrate 152a provided at the base end of the relay lens unit 3B. The optical connector 153 is mounted on a ring-shaped substrate 153a provided at the tip of the relay lens unit 3B.

  An optical fiber 154 is provided between the optical connectors 152 and 153, and the optical fiber 154 transmits infrared light incident on the optical connector 152 and emits it to the optical connector 153. The optical fiber 154 is disposed so as to pass through holes or grooves provided in the lens frames 33a, 33b, and 33c.

  In each relay lens unit 3B, an inner cylinder 155 is provided inside each of the front cylinder 32a, the rear cylinder 32b, and the connection pipe 34 so that the optical fiber 154 does not loosen in each relay lens unit 3B. The optical fiber 154 is disposed between the front cylinder 32a and the inner cylinder 155, between the rear cylinder 32b and the inner cylinder 155, and between the connection tube 34 and the inner cylinder 155. Has been.

  The optical connector 152 is disposed in the relay lens unit 3B so as to be connectable to the optical connector 153 of another relay lens unit 3B connected to the proximal end side of the relay lens unit 3B.

  When the objective lens unit 2H is attached to the tip of the most advanced relay lens unit 3B, the optical connector 153 is connected to the optical connector 151 of the objective lens unit 2H. 151 is disposed and fixed to the objective lens unit 2C.

The eyepiece unit 4 is connected to the most proximal relay lens so that infrared light from the LED 47 provided on the eyepiece unit 4 (not shown) is emitted toward the optical connector 152 of the most proximal relay lens unit 3B. It is attached to the unit 3B.
As described above, the photodiode 22 is provided inside the objective lens unit 2H and connected to the optical connector 151, and each relay lens unit 3B emits the received infrared light via the optical fiber 154.

Therefore, when the user operates the two switches 44a and 44b of the eyepiece unit 4 or the infrared light emitting device 122 to output the light amount adjustment signal of the illumination light, the infrared light emitted from the base end side is The infrared light received by the optical connector 152 of the relay lens unit 3B from the eyepiece lens unit 4 and received is emitted from the optical connector 153 through the optical fiber 154. Even when a plurality of relay lens units 3B are connected in series, the infrared light is incident on the optical connector 151 of the objective lens unit 2 through the optical fiber 154 in each relay lens unit 3B to adjust the amount of light. Can do.
(Modification 11)
In Modification 10, each relay lens unit 3B has an optical fiber 154 to receive and emit infrared light, but in Modification 11, each relay lens unit 3A receives infrared light. There was a gap through which infrared light was transmitted.

  FIG. 24 is a cross-sectional view showing the configuration of the inspection apparatus 1G when infrared light passes through the inspection apparatus. 25 is a cross-sectional view taken along line XXV-XXV in FIG. In FIG. 24, only the objective lens unit 2I of the inspection apparatus 1G and the most advanced relay lens unit 3C are shown.

The distal end portion of each relay lens unit 3C is formed so as to be able to be extrapolated so as to be fitted to the proximal end portion of the objective lens unit 2I.
In addition, the distal end portion of each relay lens unit 3C is formed so that it can be fitted to the base end portion of another relay lens unit 3C so that a plurality of relay lens units 3C can be connected in series. Yes.

  Each relay lens unit 3 </ b> C includes an outer cylinder 161 and an inner cylinder 162. A plurality of spacers 164 are provided between the outer cylinder 161 and the inner cylinder 162 so that a gap 163 is formed. Each spacer 164 is fixed to the outer cylinder 161 and the inner cylinder 162 by screws 165 from the outer periphery of the outer cylinder 161.

The relay lenses 31a, 31b, and 31c are fixed to the inner cylinder 162 by cylindrical spacers 166a, 166b, 166c, and 166d. As shown in FIG. 24, the relay lens 31a is sandwiched between the spacers 166a and 166b, the relay lens 31b is sandwiched between the spacers 166b and 166c, and the relay lens 31c is sandwiched between the spacers 166c and 166d. The spacers 166a, 166b, 166c, 166d are fixed to the inner cylinder 162 by a fixing means such as an adhesive so as to be fixed to the inner cylinder 162.
As described above, each relay lens unit 3C includes the outer cylinder 161 that is an outer cylinder member, and the inner cylinder 162 that is an inner cylinder member provided inside the outer cylinder 161. The photodiode 22 is an LED 47. Infrared light that has passed through the gap 163 formed between the outer cylinder 161 and the inner cylinder 162 is received.

  Therefore, when the user operates the two switches 44a and 44b of the eyepiece unit 4 to output the light amount adjustment signal of the illumination light, the infrared light emitted from the proximal end side is relayed from the eyepiece unit 4 to each relay. The light exits from the state-of-the-art relay lens unit 3C through the gap 163 of the lens unit 3C, enters the photodiode 22 of the objective lens unit 2I, and the amount of light can be adjusted.

(Modification 12)
The modified example 12 relates to an inspection apparatus in which an infrared reflecting mirror is disposed in the vicinity of each of the objective optical system and the eyepiece optical system.
FIG. 26 is a cross-sectional view illustrating a configuration of an inspection apparatus according to the twelfth modification.
The configuration of the inspection apparatus 1X according to the modified example 12 is the same as that of the inspection apparatus 1 according to the above-described embodiment. Omitted and only different configurations will be described.
In the objective lens unit 2X of the inspection apparatus 1, as shown in FIG. 26, an infrared reflecting mirror 211 is provided on a mirror holding member 14X that is also a lens frame. The infrared reflection mirror 211 is a visible light transmission mirror that reflects infrared light but transmits visible light. The infrared reflection mirror 211 is disposed with an inclination of 45 degrees with respect to the optical axis of the light from the eyepiece unit 2X. The mirror holding member 14X is inserted and fixed from the proximal end side of the connecting pipe 12X.

The photodiode 22 is mounted on the flexible substrate 22X. The flexible substrate 22X is fixed to a holding frame 14Y which is a photodiode holding portion so that the light receiving surface of the photodiode 22 faces the infrared reflection mirror 211. The holding frame 14Y is fixed to the connecting pipe 12X.
The flexible substrate 22X has a thin and elongated shape, and extends from the position of the photodiode 22 to the tip side of the mirror holding member 14X along the outer peripheral surface of the mirror holding member 14X. The flexible substrate 22X is electrically connected to the substrate 19 by a lead wire (not shown) at the tip, and the substrate 19 is configured to receive an output signal of the photodiode 22.

On the other hand, an infrared reflection mirror 212 is provided in a cylindrical mirror holding member 14Z in the eyepiece unit 4X. Similar to the infrared reflecting mirror 211, the infrared reflecting mirror 212 is a visible light transmitting mirror that reflects infrared light but transmits visible light. The infrared reflection mirror 212 is disposed with an inclination of 45 degrees with respect to the optical axis of the eyepiece unit 4X. The mirror holding member 14Z is inserted and fixed from the distal end side of the cylindrical body 41X.
The cylinder 41X is provided with an operation switch 44X that can be operated by the user. Further, inside the cylinder 41X, the LED 47 mounted on the substrate 51X is fixed to the cylinder 41X so that the infrared light from the LED 47 faces the infrared reflection mirror 212. The operation switch 44X and the LED 47 are connected to the control board 48 by lead wires (not shown).
Here, only one operation switch 44X is shown, but as described above, it has two switches (44a, 44b).
Since the reflected light of the inspection object passes through the infrared reflection mirror 211, the relay lens of the relay lens unit 3, and the infrared reflection mirror 212, the user observes the inspection object when looking into the eyepiece 42 of the eyepiece unit 4X. be able to.

When the user operates the switch 44X, infrared light is emitted from the LED 47, reflected by the infrared reflecting mirror 212, and emitted to the relay lens unit 3. In the objective lens unit 2X, the infrared light from the relay lens unit 3 is reflected by the infrared reflecting mirror 211 and received by the photodiode 22X. Since a detection signal corresponding to the light received by the photodiode 22X is output to the control board 19, the light quantity of the lamp 15 can be controlled.
Therefore, even in the configuration of the present modification 12, when the user operates the switch 44X of the eyepiece unit 4X and outputs the light amount adjustment signal of the illumination light, the infrared light emitted from the base end side is converted into the eyepiece lens. The light quantity can be adjusted by entering the photodiode 22X of the objective lens unit 2X through the relay lens unit 3 from the unit 4X.
(Second Embodiment)
In the first embodiment described above, the light amount adjustment signal for controlling the light amount of the illumination light is emitted from the eyepiece unit, but in this embodiment, the detection signal of the sensor provided in the objective lens unit is used. The amount of light is controlled based on this.

In the present embodiment, an acceleration sensor is used.
The configuration of the inspection apparatus 1H according to the present embodiment is substantially the same as the configuration of the inspection apparatus according to the above-described embodiment and each modification, and the same components are denoted by the same reference numerals and description thereof is omitted. Only the differences from the configuration of the inspection apparatus according to the above-described embodiment and each modification will be described.

FIG. 27 is a cross-sectional view showing a configuration of the inspection apparatus 1H when infrared light passes through the inspection apparatus. FIG. 28 is a perspective view of the substrate 22b of the objective lens unit 2J.
An operation switch 44 is provided in the eyepiece unit 4D. The operation signal of the operation switch 44 is input to the control board 48 in the eyepiece unit 4D.
The operation switch 44 is an operation device for instructing the start of illumination light irradiation. When the operation switch 44 is operated, the LED 47 connected to the control board 48 emits light.
When the operation switch 44 is pressed, the control circuit 48a generates a pulse signal for lighting the illumination lamp 15 (not shown) in the objective lens unit 2J and supplies it to the LED 47. The LED 47 emits infrared light IR corresponding to the pulse signal. Infrared light is emitted toward the tip of the connection cap 43.

A ring-shaped substrate 22b on which a plurality of photodiodes 22 are mounted in a ring shape is provided on the base end side of the objective lens unit 2J, and is arranged so as to receive infrared light from the relay lens unit 3D side. It is installed.
As shown in FIG. 28, a plurality of photodiodes 22 are mounted on one surface of the substrate 22b, and three acceleration sensors 171 are also mounted.
The three acceleration sensors 171 are arranged so as to detect accelerations in the x, y, and z directions orthogonal to each other. Here, the x and y directions are directions orthogonal to each other in the plane of the substrate 22b. The z direction is a direction orthogonal to the plane of the substrate 22b, that is, the axial direction of the inspection apparatus 1H. That is, in this embodiment, the acceleration sensor 171 detects an acceleration signal as a physical quantity.

The output signals of the plurality of photodiodes 22 and the output signals of the three acceleration sensors 171 are input to the control board 19 in the objective lens unit 2.
When the inspection apparatus 1H is assembled by connecting the objective lens unit 2J, the plurality of relay lens units 3D, and the eyepiece unit 4D, the inspection apparatus 1H is integrated. Therefore, when the user grasps the proximal end side of the inspection apparatus 1H and rotates it around the axis of the inspection apparatus 1H, the objective lens unit 2J on the distal end side also rotates.
When the control circuit 19a of the control board 19 receives the output signals of the plurality of photodiodes 22, the illumination lamp 15 is turned on. Further, the control circuit 19 a adjusts the light amount of the illumination lamp 15 according to the output signals of the three acceleration sensors 171. That is, the operation switch 44 is a switch for instructing to start adjustment of the illumination light quantity.
When detecting a predetermined acceleration signal, the control circuit 19a outputs a lamp driving signal for increasing the light amount of the illumination lamp 15 to the illumination lamp 15. When detecting another predetermined acceleration signal, the control circuit 19a decreases the light amount of the illumination lamp 15. A lamp driving signal is output to the illumination lamp 15.

  Here, when the control circuit 19a detects a clockwise acceleration signal when it is rotated clockwise around the axis of the inspection apparatus 1H, a lamp driving signal for increasing the light quantity of the illumination lamp 15 is output to the illumination lamp 15. When the control circuit 19a detects the counterclockwise acceleration signal, the control circuit 19a outputs a lamp driving signal for reducing the light amount of the illumination lamp 15 to the illumination lamp 15.

  That is, when the user rotates the inspection apparatus 1H clockwise, the light amount of the illumination lamp 15 increases by one step. Further, when the user rotates the inspection apparatus 1H clockwise, the light amount of the illumination lamp 15 is increased by one step, and as a result, the light amount of the illumination lamp 15 is increased by two steps from the beginning.

  Conversely, when the user rotates the inspection apparatus 1H counterclockwise, the light amount of the illumination lamp 15 is lowered by one step. Further, when the user rotates the inspection apparatus 1H counterclockwise, the light amount of the illumination lamp 15 is decreased by one step. As a result, the light amount of the illumination lamp 15 is decreased by two steps from the first.

Therefore, the user can change the light quantity of the illumination lamp 15 to a desired light quantity by performing the clockwise and counterclockwise operations of the inspection apparatus 1H.
FIG. 29 is a timing chart showing the acceleration in the XYZ directions of the acceleration sensor 171 and the increase / decrease in the amount of light accompanying the rotation of the inspection apparatus 1H.

  If the output signal of the acceleration sensor 171 in the x and y directions is equal to or greater than a predetermined threshold (TH1), the control circuit 19a increases the light quantity of the illumination lamp 15 by one step, assuming that the control circuit 19a has rotated to the right. A lamp driving signal is output to the illumination lamp 15. If the output signal of the acceleration sensor 171 in the x and y directions is equal to or less than a predetermined threshold value (−TH1), the control circuit 19a reduces the light amount of the illumination lamp 15 by one step, assuming that the control circuit 19a has turned to the left. The lamp drive signal to be output is output to the illumination lamp 15.

  Also in the present embodiment, for example, the control circuit 19a includes a counter, and a counter value corresponding to the light amount of the illumination lamp 15 is set in the counter. The control circuit 19a increases or decreases the counter value according to the rotation direction of the inspection apparatus 1H, generates a lamp driving signal corresponding to the counter value, and outputs the lamp driving signal to the illumination lamp 15.

  Therefore, the control board 19 is provided in the objective lens unit 2, and the illumination light of the illuminating unit according to the acceleration signals that are physical quantity signals detected by the plurality of acceleration sensors 171 that are sensors provided in the objective lens unit 2. An illumination adjustment unit for adjusting the amount of light is configured.

  In FIG. 29, clockwise rotation is detected in the T1 period, and as a result, the illumination lamp 15 increases its light quantity. In the period T2, counterclockwise rotation is detected, and as a result, the light quantity of the illumination lamp 15 decreases.

In the T3 period, the acceleration in the Z direction is detected, but it is neither clockwise nor counterclockwise, so the light quantity of the illumination lamp 15 does not change.
Therefore, according to the present embodiment, the user can adjust the light amount without using infrared light.
Further, if the output of the acceleration sensor 171 is monitored, the information of the output is confirmed, so that the direction of the objective lens unit 2J, that is, the direction of the tip of the inspection apparatus, and the extent of insertion in the subject can be confirmed. be able to. The position that is the original function of the acceleration sensor 171 can be detected, and the amount of illumination light can be adjusted simultaneously.

In the example described above, infrared light is used to turn on / off the illumination lamp 15, but on / off control of the illumination lamp 15 may be performed based on the acceleration signal. For example, if the output patterns of the three acceleration signals are a predetermined pattern, for example, if there is a large right turn within a very short time, the illumination lamp 15 is turned on, and when the illumination lamp 15 is lit, the same When an output pattern of three acceleration signals having a predetermined pattern is detected, the illumination lamp 15 may be turned off.
Furthermore, the acceleration sensor 171 is arranged not only at the distal end side but also near the eyepiece lens unit 4D on the proximal side, and by comparing information on the acceleration sensor on the distal end side and the proximal side, a connecting portion between the relay lens unit 3D, It is also possible to check looseness or displacement of the connecting portion between the relay lens unit 3D and the objective lens unit 2J or the connecting portion between the relay lens unit 3D and the eyepiece unit 4D.
According to the above-described embodiment, the reflected light of the inspection object, not the image obtained by the imaging device such as a CCD camera, can be observed with the eyes, the light amount of the illumination can be reliably adjusted and adjusted to a desired length. An inspection device can be provided.

Hereinafter, a modified example of the above-described second embodiment will be described. The configuration of the inspection device of each modification is substantially the same as the configuration of the inspection device 1 of the above-described embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted, and the above-described embodiment or Only differences from the configuration of the inspection apparatus of each modification will be described. In each modification, the same components as those in the other modifications are denoted by the same reference numerals and description thereof is omitted, and only differences from the configuration of the above-described embodiment and the inspection apparatus of each modification will be described.
(Modification 1)
In the second embodiment described above, an acceleration signal is used for adjusting the light amount of the illumination lamp 15, but in the first modification, pressure is used. That is, in the first modification, a pressure sensor that detects a pressure signal is used as a physical quantity.

FIG. 30 is a cross-sectional view showing the configuration of the inspection apparatus 1I when air passes through the inspection apparatus. 31 is a cross-sectional view of the inspection apparatus 1I along the line XXXI-XXXI in FIG.
On the base end side of the objective lens unit 2K, a ring-shaped substrate 181a on which a plurality of photodiodes 22 and a plurality of pressure sensors 181 are mounted in a ring shape is provided, and the output of each pressure sensor 181 is the control substrate 19. The control circuit 19a is arranged so that the air pressure in the inspection apparatus 1I can be detected.

A plurality of relay lens units 3E are provided in series, and FIG. 30 shows a state in which two relay lens units 3E are connected.
The outer cylinder 161 and the inner cylinder 162 are fixed with screws 165 via spacers 164. Between the two relay lens units 3E, a connection base 182 is fixed by a screw 165a.

As shown in FIG. 31, the connection cap 182 has a cylindrical shape, and a plurality of holes 183 are formed along the axial direction.
When the plurality of relay lens units 3E are coupled, at least one connection base 182 is interposed.

  A pump 184 is connected to the eyepiece unit 4E via a connector 185. The pump 184 and the connector 185 are connected by a tube 186, and a switch 187 is provided in the middle of the tube 186. When the user presses the switch 187, the internal valve is opened, air from the pump 184 is emptied, and air is supplied into the connection base 43.

  The operation switch 44 is an operation device for instructing the start of illumination light irradiation. When the operation switch 44 is operated, the LED 47 connected to the control circuit 48a of the control board 48 emits light.

  When the operation switch 44 is pressed, the control circuit 48 a generates a pulse signal for lighting the illumination lamp 15 (not shown) in the objective lens unit 2 and supplies it to the LED 47. The LED 47 emits infrared light corresponding to the pulse signal. Infrared light is emitted toward the tip of the connection cap 43.

A plurality of photodiodes 22 are mounted on one surface of the substrate 181a, and a pressure sensor 181 is also mounted.
The output signals of the plurality of photodiodes 22 and the output signal of the pressure sensor 181 are input to the control board 19 in the objective lens unit 2K.

When the inspection apparatus 1I is assembled by connecting the objective lens unit 2K, the plurality of relay lens units 3E, and the eyepiece unit 4E, the inspection apparatus 1I is integrated. Therefore, when the user operates the switch 187, the pressure in the gap 163 between the outer cylinder 161 and the inner cylinder 162 in the inspection apparatus 1I increases. As a result of the pressure increase, the pressure sensor 181 outputs an output signal corresponding to the increased pressure.
When the control circuit 19a of the control board 19 receives the output signals of the plurality of photodiodes 22, the illumination lamp 15 is turned on. Further, the control circuit 19 a adjusts the light quantity of the illumination lamp 15 according to the output pattern of the pressure sensor 181.

  For example, when the switch 187 is repeatedly turned on and off in a short cycle, the control circuit 19a, when detecting that the pressure rises and falls within a predetermined period, sends a lamp drive signal for increasing the light quantity of the illumination lamp 15 to the illumination lamp 15 When the pressure rise and fall does not change within a predetermined period, a lamp drive signal for reducing the light quantity of the illumination lamp 15 is output to the illumination lamp 15.

Therefore, the user can change the light amount of the illumination lamp 15 to a desired light amount by operating the switch 187.
According to this modification, the user can adjust the light amount without using infrared light.

In the above-described example, infrared light is used to turn on / off the illumination lamp 15, but on / off control of the illumination lamp 15 may be performed based on the pressure. For example, if the pressure change pattern of the pressure sensor is a predetermined pattern, for example, if there is a high pressure state for a very long time, the illumination lamp 15 is turned on, and when the illumination lamp 15 is lit, the same predetermined change When the pattern is detected, the illumination lamp 15 may be turned off.
Further, by providing the pressure sensor inside, it is possible to check the looseness of the connecting portion by detecting the internal pressure and checking for air leakage.
(Modification 2)
In the first modification described above, the light amount of the objective lens unit 2 is adjusted by transmitting pressure, but in the second modification, the light amount of the objective lens unit 2 is adjusted by sound. That is, in the first modification, a microphone that detects a sound signal is used as a physical quantity.

Here, only the configuration of the objective lens unit will be described.
FIG. 32 is a cross-sectional view showing a configuration of the objective lens unit 2L.

Microphones 191 and 192 are provided on the side surface and the front end surface of the objective lens unit 2L, respectively.
The microphones 191 and 192 are connected to the control board 19.

The user can output a plurality of types of sounds by operating a sounding device (not shown) that emits a predetermined sound.
A plurality of types of sound are defined by the volume of the sound, the length of the sound, the number of times the sound is generated within a predetermined period, the frequency of the sound, a combination thereof, and the like, and are controlled from the output signals of the microphones 191 and 192. Any material that can be detected on the substrate 19 may be used.

  When the user operates the sound generator to output a sound corresponding to turning on / off the light, or increasing or decreasing the amount of light, the sound is transmitted to the microphones 191 and 192, and the type of sound is selected in the control circuit 19 a of the control board 19. The lighting is turned on / off and the light quantity is increased or decreased according to the determination result.

  Note that the pump shown in the first modification may be used to send high-pressure air to the objective lens unit, generate sound with the air, and detect the generated sound with a microphone.

FIG. 33 is a cross-sectional view showing a configuration of the objective lens unit 2M.
The objective lens unit 2M has a conduit 193 for introducing air from the pump 184, and a sound generating member 194 that emits sound by air vibration is provided at an opening of the conduit 193.

The sound generation member 194 is provided in the recess 11a, and similarly, the microphone 195 is also provided in the recess 11a. The microphone 195 is connected to the control board 19.
The kind of sound can be given by the discharge pattern of the air discharged from the pump 184.

  Even in such a configuration, as in FIG. 32, when the user operates the switch 187 to output a sound corresponding to turning on / off the light, or increasing or decreasing the amount of light, the sound is transmitted to the microphone 195 and is controlled. The control circuit 19a of the substrate 19 determines the type of sound, and lighting can be turned on / off and the amount of light can be increased or decreased according to the determination result.

  As described above, according to each of the above-described embodiments, the reflected light of the inspection target can be observed with the eyes, not the image obtained by the imaging device such as a CCD camera, and the amount of illumination can be reliably adjusted and desired. An inspection apparatus adjustable in length can be provided.

  In each of the above-described embodiments and modifications, the objective lens unit has a built-in battery. However, when the remaining battery level decreases, the user is informed that the remaining battery level is low. May be.

FIG. 34 is a partial cross-sectional view of the objective lens unit 2G that informs that the battery level is low. FIG. 35 is a perspective view of a ring-shaped substrate 22c on which a plurality of photodiodes 22 and a plurality of LEDs are mounted.
A plurality of, here, three LEDs 201 are mounted on the substrate 22c of the objective lens unit 2N together with the plurality of photodiodes 22. Each LED 201 is mounted on the substrate 22a so that the light emission direction of each LED 201 is directed toward the center of the ring-shaped substrate 22a as indicated by a dotted line.

The control board 19 monitors the remaining battery level of the battery 17, and blinks each LED 201 when it is below a predetermined threshold. Since the light of the LED 201 is emitted into the optical path of the user's endoscopic image, the user can recognize that the remaining amount of the battery 17 is low.
Note that the plurality of LEDs 201 may have different colors, and the LEDs 201 having colors corresponding to the remaining amount may be caused to emit light.
As described above, the objective lens unit 2G indicates the exhausted state of the battery 17 by the change in light.

  According to each embodiment and each modification described above, it is possible to observe the reflected light of the inspection target, not the image obtained by the imaging device such as a CCD camera, and to adjust the light amount of the illumination with certain length. It is possible to provide an inspection apparatus that can be further adjusted.

  The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the scope of the present invention.

1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I inspection device, 2, 2A, 2B objective lens unit, 2Ba recess, 2C, 2D, 2E, 2F, 2G, 2H, 2I, 2J, 2K, 2L, 2M, 2N, 2J, 2X objective lens unit, 2a contact, 3, 3A, 3B, 3C, 3D, 3E, a relay lens unit, 4, 4A, 4B, 4C, 4D, 4E eyepiece unit, 11, 11A cylinder, 11a recess, 11b, 11b1 opening, 11c, 11c1, 11d recess, 12, 12X connecting tube, 12A ring-shaped member, 12A connecting tube, 12Aa reflecting surface, 12a inner peripheral surface, 13 lid, 14 , 14A lens frame, 14X mirror holding part, 14Y holding frame, 14Z mirror holding part, 15 illumination lamp, 15A LED, 15A1 substrate, 16 prism, 16A rod lens, 17, 17A battery, 18, 18A lid, 19 control board , 19a control circuit, 19b input circuit, 20 lead wire, 21 objective lens, 22 photodiode, 22a substrate, 22a1 surface, 22b, 22c substrate, 22X flexible substrate, 31a, 31b, 31b relay lens, 32 cylinder, 32a front cylinder Body, 32b rear cylinder, 32c connecting cylinder, 32c1, 32c2 inner cylinder, 33 connecting pipe, 33a, 33b, 33c lens frame, 34 connecting pipe, 35a, 35b, 35c fixing member, 41, 41X cylinder , 41a concave portion, 41a slit, 42 eyepiece, 43 connection base, 44, 44X operation switch, 44a, 44b switch, 45 battery, 46 lid, 47 LED, 48 control board, 48a control circuit, 49 infrared emitting device, 50 Camera, 51 glass plate, 51X substrate, 53a edge, 61 transparent member, 62 lens, 3 Transparent member, 63a Notch, 63b Scattering surface, 71 Battery housing, 72, 73 Contact, 73a Substrate, 81 Prism, 82 Lens, 83 Photodiode, 84 Laser output device, 91 Movable mechanism, 92 Shaft, 93 Button, 94 compression spring, 95 battery, 96 battery chamber, 97 lid, 98 eyepiece, 99 lens unit, 101a, 102a contact piece, 103 lead wire, 111 operation lever, 111a mounting portion, 111b operation portion, 112 shaft member, 113 tension spring, 114 fixing part, 121 moving mechanism, 1
21a Clearance, 122 Infrared light emitting device, 123 Reflecting device, 123a, 123b Mirror, 123a1, 123b1 Reflecting surface, 131 Photodiode, 132 Light emitting unit, 133 Battery, 141 Photodiode, 141a substrate, 142 LED, 142a substrate, 143 Battery, 143a Battery housing, 143b Lead wire, 151, 152 Optical connector, 152a Substrate, 153 Optical connector, 153a Substrate, 154 Optical fiber, 155 Inner cylinder, 161 Outer cylinder, 162 Inner cylinder, 163 Gap, 164 Spacer, 165, 165a Screw, 166a, 166b, 166c Spacer, 171 Acceleration sensor, 181 Pressure sensor, 181a Substrate, 182 Connection base, 183 hole, 184 Pump, 185 connector, 186 tube, 187 Switch 191, 92 microphone, 193 pipe, 194 sound generating member, 195 a microphone, 201 LED.

Claims (20)

One or more relay lens units configured to be connectable to each other;
An eyepiece unit configured to be connectable to a proximal end of the one or more relay lens units;
An objective lens unit configured to be connectable to a distal end portion of the one or more relay lens units;
An illumination unit that is provided in the objective lens unit and emits illumination light; and
A first power source that is provided in a state-of-the-art relay lens unit of the objective lens unit or two or more connected relay lens units, and that supplies power to the illumination unit;
According to an electromagnetic wave signal (infrared light) received by a receiving unit provided in the objective lens unit and received by a receiver provided in the objective lens unit, or a physical quantity signal detected by a sensor provided in the objective lens unit, An illumination adjustment unit for adjusting the amount of the illumination light of the illumination unit;
An inspection apparatus comprising:   The inspection apparatus according to claim 1, further comprising an electromagnetic wave signal output unit that is provided in the eyepiece unit and outputs the electromagnetic wave signal.   The inspection apparatus according to claim 2, wherein the electromagnetic wave signal output unit is movable from the outside of the visual field of the eyepiece unit into the visual field. An operation unit provided in the eyepiece unit;
The inspection apparatus according to claim 3, wherein the electromagnetic wave signal output unit moves from the outside of the visual field of the eyepiece unit into the visual field by operating the operation unit. Provided in the objective lens unit, and having an electromagnetic wave signal receiving unit for receiving the electromagnetic wave signal,
5. The electromagnetic wave signal output from the electromagnetic wave signal output unit is received by the electromagnetic wave signal receiving unit through a relay lens inside the one or more relay lens units. The inspection device according to any one of the above. An electromagnetic wave signal receiving unit that is provided outside the objective lens unit and receives the electromagnetic wave signal;
The inspection apparatus according to claim 2, wherein the electromagnetic wave signal receiving unit receives the electromagnetic wave signal output from the electromagnetic wave signal output unit and passed outside the one or more relay lens units.   The said electromagnetic wave signal receiving part is provided in the said objective lens unit so that the said electromagnetic wave signal reflected by the mirror provided in the front end side of the said objective lens unit may be received. The inspection device described in 1. An electromagnetic wave signal receiving unit that is provided outside the objective lens unit and receives the electromagnetic wave signal;
The inspection according to claim 2, wherein the electromagnetic wave signal from the electromagnetic wave signal output unit is received by the electromagnetic wave signal receiving unit via a support device that supports the one or more relay lens units. apparatus.   The inspection apparatus according to claim 8, wherein the electromagnetic wave signal is received by the electromagnetic wave signal receiving unit through a gap formed in the support device. Each support device has a second power source;
The electromagnetic wave signal is received by the support device at the most proximal end,
9. The inspection apparatus according to claim 8, wherein each supporting device generates and outputs the same electromagnetic wave signal as the electromagnetic wave signal based on the received electromagnetic wave signal. Provided inside the objective lens unit, having an electromagnetic wave signal receiving unit for receiving the electromagnetic wave signal,
The inspection apparatus according to claim 2, wherein the electromagnetic wave signal receiving unit receives the electromagnetic wave signal output from the electromagnetic wave signal output unit and passed through the one or more relay lens units. Provided inside the objective lens unit, having an electromagnetic wave signal receiving unit for receiving the electromagnetic wave signal,
Each relay lens unit has a third power source,
The inspection apparatus according to claim 2, wherein each relay lens unit generates and outputs the same electromagnetic wave signal as the electromagnetic wave signal based on the received electromagnetic wave signal. Provided inside the objective lens unit, having an electromagnetic wave signal receiving unit for receiving the electromagnetic wave signal,
The inspection device according to claim 2, wherein each relay lens unit emits the received electromagnetic wave signal through an optical fiber. Provided inside the objective lens unit, having an electromagnetic wave signal receiving unit for receiving the electromagnetic wave signal,
Each relay lens unit has an outer cylinder member and an inner cylinder member provided inside the outer cylinder member,
The electromagnetic wave signal receiving unit receives the electromagnetic wave signal emitted from the electromagnetic wave signal output unit and passing through a gap formed between the outer cylinder member and the inner cylinder member. The inspection device described.   The inspection apparatus according to claim 1, wherein the electromagnetic wave signal is infrared light or laser light. The sensor detects acceleration, pressure or sound as a physical quantity,
The inspection apparatus according to claim 1, wherein the physical quantity signal is the acceleration, the pressure, or the sound signal.   The inspection apparatus according to claim 1, wherein an imaging apparatus can be attached to the eyepiece unit.   The inspection apparatus according to claim 1, wherein the objective lens unit has an elongated shape, and acquires an image of a subject from the front or side of the elongated shape. The relay lens unit has two field lenses and an imaging lens disposed between the two field lenses,
One of the two field lenses emits incident light to the imaging lens,
The imaging lens emits incident light to the other of the two field lenses,
The inspection apparatus according to claim 1, wherein the other of the two field lenses emits incident light as parallel light.   The inspection apparatus according to claim 1, wherein the objective lens unit indicates a consumed state of the battery by a change in light.

Images