JPH0353211Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a field of view adjustment device for an infrared endoscope used for measuring temperature distribution, stress distribution, etc. in areas that cannot be viewed directly with a camera, such as the inner surface of a box structure.

Conventional technology As a general endoscope visual field adjustment device, the fourth
As shown in the figure, the tip part has a curved part 1 and an operating lever 2 is provided at the hand.
By operating the curved portion 1, the curved portion 1 is bent vertically and horizontally, and the viewing direction is adjusted by whether or not a side viewing adapter is attached to the tip (direct viewing, side viewing).

In addition, as shown in Fig. 5, there is a special endoscope that is equipped with an inner surface monitoring adapter 3, etc., and is moved forward and backward by guide rollers 6 along the inner surface of a pipe 5, etc., which has a uniform inner diameter. , the viewing direction is adjusted by a rotating mirror 7.

The above-mentioned prior art relates to an industrial endoscope using a quartz fiber, but has not been disclosed regarding an endoscope using a crystalline infrared fiber.

Problems to be Solved by the Invention When the above technology is applied to an endoscope mainly made of crystalline infrared fibers and an attempt is made to observe areas that cannot be viewed directly with a camera, such as the inner surface of a box structure, the following problems occur.

Since the fiber itself is brittle, the minimum bending radius is large. Therefore, the endoscope body cannot be bent in the narrow space of the box.

The fiber diameter is thicker than quartz fiber (approximately 10
(2 times), so if the motor is mounted on the side of the image guide, the tip will be large and difficult to handle.

Furthermore, the heat generated by the motor is transmitted to the image fiber, reducing data reliability.

It is difficult to accurately adjust the field of view.

The present invention was developed in view of the above circumstances, and its purpose is to improve the positioning accuracy of the endoscope in the viewing direction, to enable automatic adjustment, and to reduce costs. A visual field adjustment device for infrared endoscopes that not only makes it possible to measure data in the fiber hollow part of the image guide, but also allows the step motor to be placed on the same axis, making it easier to handle without making the tip part thick. Our goal is to provide the following.

Means and Effects for Solving the Problems In order to achieve the above object, the present invention provides a mirror accommodating portion 24 in the endoscope body 10 and windows 11 and 12 in the peripheral wall portion of the mirror accommodating portion 24. , a first step motor 15 is attached to the endoscope main body 10.
and a holder 16 that is rotationally driven by a first step motor 15.
A support arm 21 is provided that protrudes into the mirror 22, and a mirror 22 is provided on the support arm 21 so as to be tiltable. A cam 20 is provided so as to be circumscribed by the cam 20.

By rotationally driving the first step motor 15, the mirror 22 is rotated via the holder 16 and the support arm 21, and by rotationally driving the second step motor 18, the cam 20 is rotated to rotate the mirror 22. It tilts to enable feeding to a desired step angle and continuous feeding.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.

Reference numeral 10 denotes an endoscope body, and a mirror accommodating portion 24 is provided at the front end of the endoscope body 10, and windows 11 and 12 facing each other are provided in the mirror accommodating portion 24. First and second housing parts 13 and 14 are coaxially formed at the distal end of the endoscope body 10, and the first and second housing parts 13 and 14 are coaxially formed.
A mirror rotation motor 15, which is a first step motor, is housed in the housing portion 13 of the mirror. A holder 16 is rotatably provided in the second housing part 14,
The holder 16 is the drive shaft 1 of the mirror rotation motor 15.
It is connected to 7. A mirror tilting motor 18, which is a second step motor, is attached to the holder 16, and a cam 20 is attached to a drive shaft 19 of this mirror tilting motor 18. This cam 20 is formed from the peripheral edge of a cut surface obtained by cutting a cylinder diagonally.

A support arm 21 is provided protruding from the holder 16, and a yoke portion 2 provided at the tip of the support arm 21
A mirror 22 is attached to 1a so as to be tiltable by a support shaft 23', and a leaf spring 23 is attached to the support arm 21, and the leaf spring 23 is brought into contact with the back surface of the end of the mirror 22. Further, the cam 20 is circumscribed on the back surface of the mirror 22. Then, the mirror 22 is moved by the cam 20 by the urging force of the leaf spring 23.
is being forced on.

Further, a heat insulating plate 25 is provided between the mirror accommodating portion 24 and the second accommodating portion 14 .

26 is a light guide, 27 is an eyepiece, and 28 is a controller.

Next, the operation will be explained.

The mirror rotation motor 15 is rotationally driven by the drive control command from the controller 28, and the holder 16 is rotated.
The support arm 21 rotates through the mirror 22, and the mirror 22 rotates. At this time, as the holder 16 rotates, the mirror tilting motor 18 also rotates.

Further, the mirror tilting motor 18 is rotationally driven by a drive control command from the controller 28, and the cam 20 is rotated.
2 tilts around the support shaft 23'. Since the mirror 22 is supported by the leaf spring 23, it is always in a stable state.

In this way, the rotation and tilting (up and down) of the mirror 22 are all controlled by the controller 28, and feeding to a desired step angle and continuous feeding are performed.

The heat insulating plate 25 is provided to prevent the influence of heat generated by the motor.

The visual field adjusting device A according to the present invention is used in the irradiation system B of an optical CVD device as shown in FIG.
The laser beam D can be irradiated to any arbitrary position on the sample placed inside the chamber, and the direction of incidence can be easily controlled.

Effects of the Invention Since the present invention has been described in detail above, by rotationally driving the first step motor 15, the mirror 22 is rotated via the holder 16 and the support arm 21, and the second step motor 18 is rotated. By driving, the cam 20 can be rotated to tilt the mirror 22, thereby enabling feeding to a desired step angle and continuous feeding.

This improves the positioning accuracy of the endoscope in the viewing direction, allows automatic adjustment, reduces costs by using step motors 15 and 18, and allows data measurement of the fiber cavity of the image guide. is made possible by the step movement of mirror 22. Furthermore, it becomes possible to arrange the step motors 15 and 18 on the same axis, so that the tip part does not become thick and is easy to handle.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view of an infrared endoscope equipped with a visual field adjusting device according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of an embodiment of the present invention, and Fig. 3 is an optical CVD endoscope.
The side view of the device, FIGS. 4 and 5, are explanatory diagrams of a conventional endoscope. 11 and 12 are windows, 15 and 18 are step motors, 16 is a holder, and 22 is a mirror.

Claims (1)

[Scope of utility model registration request] A mirror accommodating portion 24 is provided in the endoscope body 10, and windows 11, 12 are provided in the peripheral wall portion of the mirror accommodating portion 24.
The endoscope body 10 is provided with a first step motor 15 and a holder 16 that is rotationally driven by the first step motor 15, and the holder 16 is provided with a support arm 21 that protrudes into the mirror housing section 24. A mirror 22 is attached to the support arm 21 with a support shaft 23'.
The holder 16 is provided with a second step motor 18, and the drive shaft of the second step motor 18 is provided with a cam 20 that circumscribes the back surface of the mirror 22.
A mirror 22 is attached to the support arm 21 of the cam 20.
1. A visual field adjustment device for an infrared endoscope, comprising a spring member biased in a direction of collision with the infrared endoscope.