JPH03242131A - Infrared-ray endoscope device - Google Patents

Abstract

PURPOSE:To attain the photographing of the area of a wider part than the area of an optical fiber, while using one piece of optical fiber by reflecting successively a light beam from an object to be photographed with two mirrors and leading it to one piece of optical fiber, and allowing it to scan the respective mirrors in different directions. CONSTITUTION:A first mirror 15 is placed in a position in which the object 1 is reflected and turned in the direction in which one direction of the body 1 is reflected successively. Also, a second mirror 16 is placed in a position in which the body 1 reflected on the mirror 15 is reflected and turned in the direction in which the direction different from the direction of the body 1 reflected on the mirror 15 is reflected successively. Also, a condensing lens 2 condenses the light from the body 1 reflected by the mirror 16. Moreover, as for an optical fiber 6, one end face thereof is positioned in a condensing point of the condensing lens 2. Furthermore, a detector 8 detects the light radiated from the other end of the optical fiber 6. In such a state, a signal processor 10 reproduces the image of the object from the output of the detector 8 and the turning information of the mirrors 15, 16. Consequently, the area of a wider part than the area of the optical fiber can be photographed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an infrared endoscope device for photographing a subject.

[Prior Art 1] Conventionally, when looking inside something, there is an endoscope that uses visible light. This is a device in which a sensor such as a CCD is housed in a microcapsule, and the electrical signals obtained there are extracted to the outside via an electric wire and viewed. However, although CCD sensors have good sensitivity to visible light, they have very low sensitivity to infrared light. Therefore, if infrared information is required, the second
As shown in the figure, multiple optical fibers are bundled to form an image of the subject on the entire end face, and the infrared information is transmitted to the outside through the optical fibers, and the infrared information is converted into visible light at the transmission destination. .

[Problems to be Solved by the Invention] However, each optical fiber is enlarged as shown in Figure 3, and since images are transmitted through the shaded core portion, the portions other than the core are not reproduced. This poses a problem in that it does not contribute to the image and the reproduced image becomes discontinuous.

[Means for Solving the Problems] In order to solve these problems, the present invention includes a first mirror that is placed at a position where a subject is photographed and rotates in a direction in which one direction of the subject is sequentially photographed; A second mirror is placed at a position where the subject reflected in the first mirror is reflected and rotates in a direction in which directions different from the direction of the subject reflected in the first mirror are sequentially reflected; It is equipped with an optical fiber that transmits the light beam from the subject, and a signal processor that reproduces the subject image from the light emitted from the other end of the optical fiber and the rotation information of the first and second mirrors. be.

[Operation] The light rays from the subject are focused on one end of the optical fiber via the second mirror and the first mirror, and guided to a desired location by the optical fiber. The light is converted into an electrical signal by a detector, and the converted electrical signal is reproduced as a subject image in a signal processing circuit based on the rotation signal from the mirror, and is then subjected to various processing and displayed as an image on a monitor. will be displayed as .

[Implementation fM] FIG. 1 is a block diagram showing one embodiment of the present invention.

In the figure, 15 is a first mirror placed in a position to photograph the subject 1, and 16 is a second mirror placed in a position to photograph the subject reflected in the mirror 15. The mirror 15 is configured to rotate around an axis A in the figure, and the mirror 16 is configured to rotate around an axis B in the figure.

Therefore, when the mirror 15 rotates, the subject 1 is scanned in the X direction, so that part of the subject 1 is sequentially photographed.

Further, when the mirror 16 rotates, the X direction of the mirror 15 is scanned. Since object 1 is reflected in mirror 15, mirror 15
When the X direction of the subject 1 is scanned, the Y direction of the subject 1 is scanned.

In this manner, a desired portion of the object is scanned by rotating the mirrors 15 and 16. At this time, the mirror 15 is rotated at 1 per second.
Rotate the mirror 16 at a speed of about 200 rotations per second.
If it is rotated at a reciprocating speed, the subject 1 will be scanned in the Y direction at high speed while also being sequentially scanned in the X direction, and the entire area of the part of the subject 1 shown by the bold line will be scanned in one second.

In this way, the mirrors 15 and 16 scan the object 1, and the light finally reflected by the mirror 16 is focused on one end face of the optical fiber 6 by the close-up lens 2, which is a focusing means. At this time, visible light is blocked by the silicon window 3 and only infrared rays are taken out and input into the optical fiber 6. The infrared rays incident thereon are transmitted to a desired location through an optical fiber 6, exit from the other end of the optical fiber 6, and form an infrared image on an infrared detector 8 by a relay lens 7.

This infrared image has passed through the optical fiber 6, and since only one optical fiber 6 is used, the image has an extremely small area. The infrared image incident on the infrared detector 8 is supplied to the signal processor 10, where the mirror 1
5 and the mirror 16, a process of converting a nearly point-like image signal into a planar image signal is performed. In this way, the image of the subject 1 is reproduced, and the reproduced image is displayed on the monitor 11.

By color-coding the infrared image displayed on the monitor 11 according to the energy of the infrared rays, it is possible to know the relative temperature of the subject 1. However, in this state, the actual temperature of the subject 1 cannot be known. Therefore, the sensor 12 detects the environmental temperature, and the signal is supplied to the signal processing circuit 10 for processing to determine the actual temperature.

The mirrors 15, 16 and the sensor 12 are housed in a microcapsule, and the mirrors 15, 16 are rotatably driven by a wire (not shown) or driven by compressed air. Also,
The mirror 16 may be rotated instead of rotating.

[Effects of the Invention] As explained above, in this invention, the light from the subject is sequentially reflected by two mirrors and guided to one optical fiber, and each mirror is scanned in different directions. While using the optical fiber, it is possible to image a much wider area than the area of the optical fiber. For this reason, there is an effect that an inconvenient phenomenon in which the reproduced image becomes discontinuous because the image is not reproduced except for the core part as in the conventional case does not occur.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing an end face of a conventional optical fiber, and FIG. 3 is a partially enlarged view of the end face. 1... Subject, 2... Close-up, 5
...Condensing lens, 6...Infrared optical fiber,
8... Infrared detector, 10... Signal processor, 1
1...Monitor.

Claims (1)

[Claims] A first mirror placed at a position where the subject is photographed and rotated in a direction in which one direction of the subject is sequentially photographed; and a first mirror placed at a position where the subject reflected in the first mirror is photographed. a second mirror that rotates in a direction in which directions different from the direction of the subject reflected in the mirror are sequentially reflected; a condensing means that condenses light rays from the subject reflected by the second mirror; and one end surface. is an optical fiber located at the condensing point of the condensing means, a detector that detects the light emitted from the other end of the optical fiber, and a detector output and rotation information of the first and second mirrors. An infrared endoscope device comprising: a signal processor for reproducing a subject image.