JPH1195129A - Magnifying glass using optical fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a magnified image restricted into a desired observing point by making the fitting distance of an eyepiece to the end surface of the light guiding part of the base end part side of an optical fiber adjustable and providing a tip end part with a transparent head. SOLUTION: The tip end surface 16A formed on the tip end part side of the optical fiber 11 is made to abut on the desired observing point of the surface of an object to be observed so that the image fetched to the light guiding part 11B can be observed as the magnified image obtained through the distant eyepiece magnifying lens 13. The image of the observing point can be fetched to the guiding part 11B and it is discriminated which point of the object to be observed this observing image exists on a condition that the tip end surface of the guiding part 11B is made to coincide with the tip end surface 16A of the transparent head 16 and made to abut on the desired point of the surface of the object. Since the fitting distance of the lens 13 to the end surface of the guiding part 11B is made adjustable, it can be easily made to coincide with the focal distance of the lens 13 and the magnified image can be clearly recognized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection of a deep part of a structure having a complicated shape, an inspection of a driving portion of various devices, an inspection of various pipes, an inspection of a machining state of a mold surface, and printing. The present invention relates to a magnifying glass using an optical fiber, which is suitable for use in inspecting a dot state of a surface.

[0002]

2. Description of the Related Art Heretofore, as a magnifying mirror using an optical fiber, there is a magnifying mirror provided with an eyepiece on the base end side of the optical fiber and an objective lens on the distal end side. The magnifier using this optical fiber can transmit an image of the surface of the observation target taken by the eyepiece from the surface of the observation target to the remote objective lens by the optical fiber, for example, a complicated shape. It is also possible to easily observe the back part of the structure with the above.

At this time, the magnifying glass using the optical fiber observes an enlarged image through an eyepiece with the objective lens being separated from the surface of the observation object by the focal length.

[0004]

However, in the prior art, it is necessary to always observe the objective lens at a certain distance from the surface of the observation object, and the observation is limited to a desired specific observation point on the surface of the observation object. I cannot get an enlarged image. That is, it was not clear which point on the surface of the observation object was being observed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnifier using an optical fiber capable of remotely observing an image of the surface of an observation object, and obtain an enlarged image limited to a desired specific observation point on the surface of the observation object. It is in.

[0006]

According to a first aspect of the present invention, there is provided a magnifying mirror using an optical fiber having a light guide portion covered by a fiber jacket, wherein an eyepiece magnifying lens is provided at a base end side of the optical fiber. And an adjustable mounting distance of the eyepiece with respect to the end surface of the light guide section on the base end side of the optical fiber. A transparent head is provided on the tip side of the optical fiber, and the tip of the optical fiber is provided. The light guide portion on the side is embedded in the transparent head in a bare state where the fiber jacket is peeled off in the transparent head, so that the distal end surface of the light guide portion is aligned with the distal end surface of the transparent head. Things.

According to a second aspect of the present invention, in the first aspect of the present invention, the transparent head can be provided with irradiation light from a light source.

According to a third aspect of the present invention, in the second aspect of the present invention, a light source connecting portion is further provided at a base end side of the optical fiber, and a light source connecting portion and the transparent head are provided between the light source connecting portion and the transparent head. An auxiliary optical fiber for guiding the light emitted from the light source is provided, and the distal end surface of the auxiliary optical fiber is set in the transparent head at a position separated from the distal end surface of the transparent head.

[0009]

According to the first aspect of the present invention, the following effects are obtained. The magnifying glass makes the distal end surface of the transparent head provided on the distal end side of the optical fiber abut on a desired specific observation point on the surface of the object to be observed, thereby remote-controlling the image taken in the light guide section of the optical fiber. Can be observed as an enlarged image through an eyepiece.

In the above, the front end face of the light guide section of the optical fiber is made to match the front end face of the transparent head on the front end side of the optical fiber, and the front end face of the transparent head is set to a desired specific surface of the surface of the observation object. The image of the observation point can be taken into the light guide portion of the optical fiber in a state where the observation image is in contact with the observation point, and the observation image can be clearly identified at which point on the surface of the observation object.

In the above, when the distal end surface of the transparent head on the distal end side of the optical fiber is brought into contact with the surface of the observation object, the optical fiber embedded in the transparent head and extending to the distal end surface of the transparent head Since the light guide section is exposed in a state where the fiber jacket is peeled off in the transparent head, light around the transparent head is introduced into the light guide section from the side surface of the exposed light guide section, and this light is It can be used as observation light. That is, the above-mentioned light introduced into the light guide section of the optical fiber becomes reflected light at the observation point on the surface of the observation object, and the image at the observation point is taken into the light guide section.

In the above, the mounting distance formed by the eyepiece with respect to the end face of the light guide section on the base end side of the optical fiber can be adjusted, so that the mounting distance can be easily matched with the focal length of the eyepiece. As a result, an enlarged image through the eyepiece can be clearly observed.

According to the second aspect of the present invention, the following operations are provided. By applying the light from the light source to the transparent head, the light from the light source is transparent even when the area around the observation point on the surface of the object to be observed is dark and sufficient light for observation cannot be obtained around the transparent head. The light can be guided to the head, and the light can be introduced into the light guide from the exposed side of the light guide in the transparent head and used as observation light.

According to the third aspect of the present invention, the following operations are provided. The light source is connected to the light source connection part provided on the base end side of the optical fiber, and the irradiation light of the light source is guided to the transparent head by the auxiliary optical fiber. Even if the sufficient amount of light for observation cannot be obtained in the periphery, the light guided by the auxiliary optical fiber should be taken into the side of the exposed light guide or inside the light guide in the transparent head and used as observation light. Can be.

[0015]

FIG. 1 is a schematic diagram showing a first embodiment, FIG. 2 is a schematic diagram showing a second embodiment, and FIG. 3 is a schematic diagram showing a third embodiment.

(First Embodiment) (FIG. 1) The magnifying mirror 10 uses an optical fiber 11, and the optical fiber 11 is formed by a fiber jacket 11A.
1B.

The magnifying mirror 10 is configured such that a lens unit 14 of an eyepiece magnifying lens 13 is screwed into a connection screw 12 provided on a base end side of an optical fiber 11 and can be fixed by a lock nut 15. The lens unit 14 of the eyepiece magnifying lens 13 is capable of adjusting the mounting distance formed by the eyepiece magnifying lens 13 with respect to the end surface of the light guide 11B on the base end side of the optical fiber 11 by adjusting the screwing position with respect to the connection screw 12. This mounting distance can be matched with the focal length f of the eyepiece magnifying lens 13.

The magnifying glass 10 is provided with a transparent head 16 made of a transparent resin on the distal end side of the optical fiber 11. The light guide 11B on the tip end side of the optical fiber 11 is
Embedded in the transparent head 16 in a bare state (bare length L) where the fiber jacket 11A is peeled off,
The front end surface of the light guide 11B is connected to the front end surface 16A of the transparent head 16.
It is made to match.

The magnifying glass 10 is used as follows. (1) The eyepiece magnifying lens 13 is held on the side of the observer, and the transparent head 16 is brought to an observation target remote from the observer, for example, to a specific part in the back of a complex-shaped structure. The surface 16A is brought into contact with a desired specific observation point on the surface of the specific portion.

(2) According to the above (1), the light guide section 1 of the optical fiber 11 disposed on the front end face 16A of the transparent head 16
An image of the surface of the object to be observed is taken in from 1B, and this image is transmitted to the eyepiece magnifying lens 13 by the optical fiber 11 so that the observer can observe it.

Therefore, according to the magnifying glass 10, the following effects are obtained. The magnifying mirror 10 causes the distal end surface 16A of the transparent head 16 provided on the distal end side of the optical fiber 11 to abut on a desired specific observation point on the surface of the observation target, thereby to form the light guide 11B of the optical fiber 11. The image taken into the camera can be observed as an enlarged image through a remote eyepiece magnifying lens 13.

In the above, the front end face of the light guide 11B of the optical fiber 11 is matched with the front end face 16A of the transparent head 16 on the front end side of the optical fiber 11, and
6, the image of the observation point can be taken into the light guide 11B of the optical fiber 11 in a state where the tip surface 16A of the sample 6 is in contact with a desired specific observation point on the surface of the observation object. The point on the surface of the object can be clearly identified.

In the above description, when the distal end face 16A of the transparent head 16 on the distal end side of the optical fiber 11 is brought into contact with the surface of the object to be observed, the transparent head 16 is embedded in the transparent head 16 Since the light guide 11B of the optical fiber 11 extending to the transparent head 16 is exposed in a state where the fiber jacket 11A is peeled off in the transparent head 16, the light around the transparent head 16 is exposed to the exposed light guide 11B. Can be taken into the light guide portion 11B from the side surface and can be used as observation light. That is, the light introduced into the light guide section 11B of the optical fiber 11 becomes reflected light at the observation point on the surface of the observation object, and the image at the observation point is taken into the light guide section 11B.

In the above description, the eyepiece magnifying lens 13 is positioned with respect to the end face of the light guide 11B on the base end side of the optical fiber 11.
Since the mounting distance can be adjusted, the mounting distance can be easily matched with the focal length of the eyepiece magnifying lens 13, and as a result, an enlarged image passing through the eyepiece magnifying lens 13 can be clearly observed.

(Second Embodiment) (FIG. 2) The magnifying glass 20 of the second embodiment is replaced with the magnifying glass 10 of the first embodiment.
The differences are as follows. That is, the magnifying glass 20
The transparent head 16 of the magnifying glass 10 is replaced by an L-shaped transparent light guide head 21, and the optical fiber 1 of the transparent light guide head 21 is
A light source connecting portion 21A is provided at a portion orthogonal to 1, and a penlight type light source 22, for example, is detachably attached to the light source connecting portion 21A. As a result, the magnifying glass 20
2 can be applied to the transparent light guide head 21.

Therefore, according to the magnifying glass 20, in addition to the operations (1) to (7) of the magnifying glass 10 of the first embodiment, the following operations are provided.

By applying the irradiation light of the light source 22 to the transparent light guide head 21, the area around the observation point on the surface of the object to be observed is dark and a sufficient amount of observation light cannot be obtained around the transparent light guide head 21. Also in this case, the light emitted from the light source 22 is guided to the transparent light guide head 21, and the light is then guided from the side of the exposed light guide 11 </ b> B inside the transparent light guide head 21.
1B, which can be used as observation light.

(Third Embodiment) (FIG. 3) The magnifying glass 30 of the third embodiment is replaced with the magnifying glass 10 of the first embodiment.
The differences are as follows. That is, the magnifying glass 30
The eyepiece magnifying lens 1 provided on the base end side of the magnifying glass 10 described above.
The third lens unit 14 was screwed into a connection screw 32 provided in the light source connection portion 31, and the fixing position of the lens unit 14 with respect to the connection screw 32 was fixed by a lock nut 33. The lens unit 14 of the eyepiece magnifying lens 13 adjusts the screwing position with respect to the connection screw 32 to adjust the optical fiber 1
The mounting distance formed by the eyepiece magnifying lens 13 with respect to the end face of the light guide portion 11B on the base end side of the eyepiece 1 can be adjusted, and this mounting distance can be matched with the focal length f of the eyepiece magnifying lens 13.

The light source connecting portion 31 is screwed into the connecting screw 12 provided on the base end side of the optical fiber 11 in the magnifying mirror 10, and the magnifying mirror 30 can be fixed by a lock nut 34. .

At this time, the optical fiber 11 of the magnifying glass 30
Is different from the optical fiber 11 in the magnifier 10 described above in that the light guide 11B is provided at the center of the fiber jacket 11A.
In addition to the above, a plurality of auxiliary optical fibers 35 are provided around the light guide 11B, and the optical fibers 35 extend between the light source connection end face 31A of the light source connection part 31 and the transparent head 16. (FIGS. 3B, 3C, and 3C are cross-sectional views taken along line CC in FIG. 3B). Then, for example, a penlight type light source 22 can be connected to the light source connection end face 31A of the light source connection portion 31. In addition, the distal end surface of the auxiliary optical fiber 35 is set at a position (separation length L) separated from the distal end surface 16A of the transparent head 16 in the transparent head 16, and protrudes from the distal end surface of the auxiliary optical fiber 35 in the transparent head 16. The light guide 11B is embedded in the transparent head 16 in a bare state (bare length L) so that the front end surface of the light guide 11B matches the front end surface 16A of the transparent head 16.

Therefore, the magnifying glass 30 has the following operation in addition to the operations of the magnifying glass 10 of the first embodiment. By connecting the light source 22 to the light source connection part 31 provided on the base end side of the optical fiber 11 and guiding the irradiation light of the light source 22 to the transparent head 16 by the auxiliary optical fiber 35,
The area around the observation point on the surface of the observation object is dark and the transparent head 16
In the case where a sufficient amount of light for observation cannot be obtained around the periphery of the transparent head 1, the light guided by the auxiliary optical fiber 35 can be used.
In the light guide section 11B, the side surface of the exposed light guide section 11B or the light guide section 11B can be taken in and used as observation light.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific structure of the present invention is not limited to this embodiment, and the design can be changed without departing from the scope of the present invention. The present invention is also included in the present invention.

[0033]

As described above, according to the present invention, in a magnifying glass using an optical fiber capable of remotely observing an image of the surface of the observation object, a desired specific observation point on the surface of the observation object is obtained. A limited enlarged image can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a first embodiment.

FIG. 2 is a schematic diagram showing a second embodiment.

FIG. 3 is a schematic diagram showing a third embodiment.

[Explanation of symbols]

 10, 20, 30 Magnifying mirror 11 Optical fiber 11A Fiber jacket 11B Light guide 13 Eyepiece magnifying lens 16 Transparent head 21 Transparent light guide head 22 Light source 31 Light source connector 35 Auxiliary optical fiber

Claims (3)

[Claims] 1. A magnifying mirror using an optical fiber having a light guide section covered with a fiber jacket, wherein an eyepiece magnifying lens is provided at a base end side of the optical fiber, and a light guide at a base end side of the optical fiber is provided. A transparent head is provided at the distal end of the optical fiber, and a light guide at the distal end of the optical fiber is provided with a fiber jacket inside the transparent head. A magnifying glass using an optical fiber, wherein the magnifying glass is embedded in the transparent head in a stripped and bare state, and a front end surface of the light guide portion is matched with a front end surface of the transparent head. 2. The magnifying glass using an optical fiber according to claim 1, wherein irradiation light of a light source can be given to the transparent head. 3. A light source connection part is provided on a base end side of the optical fiber, an auxiliary optical fiber for guiding irradiation light of a light source is provided between the light source connection part and the transparent head, and a distal end face of the auxiliary optical fiber 3. A magnifying glass using an optical fiber according to claim 2, wherein a distance from the front end surface of the transparent head is set in the transparent head.