JP2575916Y2 - Viewfinder for infrared camera - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a viewfinder used in an infrared image processing apparatus, and more particularly to a viewfinder having a function of synthesizing an infrared image and a visible image.

[0002]

2. Description of the Related Art An infrared image processing apparatus acquires infrared rays emitted from an object and displays the temperature distribution in color. However, the infrared image processing apparatus enables focusing of an infrared camera and confirmation of whether or not a target is actually projected. For example, a viewfinder as shown in FIG. 4 is used. In FIG. 4, this viewfinder is similar to that of a video camera,
Is provided with a color monitor TV 42 at one end, and an eye 44 is placed on an eyepiece 43 provided at the other end to visually confirm the infrared image projected on the color monitor TV 42. In addition, as the color monitor TV42, a liquid crystal (LC
D) TV is used.

However, in the conventional viewfinder shown in FIG. 4, since an image-processed infrared image is viewed, it is difficult to determine the viewed object when the temperature of the object is low, such as a hot plate. There are cases.

Therefore, conventionally, as shown in FIG. 5, for example, a visible camera 52 is attached to an infrared camera body 51 of an infrared image processing apparatus, and a dichroic mirror 53 is provided in front of a window of the infrared camera body 51 for taking in infrared rays. The infrared image is directly captured by the infrared camera body 51, while the visible image is captured by the reflection mirror 54 and the visible camera 52 through the infrared camera body 5.
1, the infrared camera body 51 combines the two images, and displays them on a monitor TV. Since a perfect composite image is displayed on the monitor TV,
The object to be measured can be reliably confirmed by relying on the visible image, and the problem of the viewfinder system shown in FIG. 4 is solved.

[0005]

However, the conventional combined display method of a visible image and an infrared image requires an expensive dichroic mirror and a visible camera, which is not only expensive but also increases the weight of the infrared camera body. And there is a problem of lack of handyness or simplicity like a viewfinder provided in a video camera.

The present invention has been made in view of such a conventional problem, and has as its object to provide a function of combining an infrared image and a visible image which is inexpensive and lightweight and can be attached without increasing the weight of the infrared camera body. An object of the present invention is to provide a viewfinder for an infrared camera provided with the above.

[0007]

In order to achieve the above object, a viewfinder for an infrared camera according to the present invention has the following configuration. That is, the viewfinder for an infrared camera of the first invention is provided in a lens barrel with a color monitor TV for displaying an infrared image; a lens for adjusting the angle of view of a direct-view image taken from the outside to the color monitor TV; And a half mirror for combining the two images by reflecting the infrared image projected on the color monitor TV.

The viewfinder for an infrared camera of the second invention is a color monitor TV for displaying an infrared image in a lens barrel.
A lens for adjusting the angle of view of a direct-view image taken from the outside to the color monitor TV; a reflecting mirror for reflecting the direct-view image taken by the lens in the right-angle direction; a reflecting mirror for transmitting an infrared image projected on the color monitor TV And a half mirror that combines both images by reflecting a direct-view image from the camera.

In the viewfinder for an infrared camera of the third invention, a first lens barrel fixedly arranged and a second lens barrel having one end rotatably supported by a shaft are connected by a cylindrical bellows. ;
The first lens barrel is provided at one end with a lens for taking in a direct-view image from the outside with the angle of view thereof adjusted to the angle of view of the color monitor TV. A second reflecting mirror is attached to the second lens barrel to reflect a direct-view image that has passed through the bellows on a rotating shaft on one end side at a right angle toward the other end side; The color monitor TV for projecting an infrared image is provided on the side of the camera, and the two images are combined by transmitting the direct-view image from the second reflection mirror and reflecting the infrared image projected on the color monitor TV on the way. A half mirror to be sent to the side;

[0010]

Next, the operation of the viewfinder for an infrared camera according to the present invention configured as described above will be described. In the viewfinder for an infrared camera of the present invention, a color monitor TV for displaying an infrared image is provided in a lens barrel so that a composite image of a visible image and an infrared image can be seen when an eyepiece is placed on the eyepiece. Since it incorporates an optical system for taking in an image and synthesizing it with an infrared image projected on a color monitor TV, it can be configured at low cost and light weight, and a viewfinder suitable for an infrared camera can be provided.

The first device is a telescope type, the second device is a periscope type, and the third device is a movable type. In this way, a device having an appropriate form according to the application can be constructed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a viewfinder for an infrared camera according to a first embodiment of the present invention. This viewfinder is
As shown in FIG. 1A, an angle-of-view adjusting lens 2 is provided inside one end (left side in the figure) of a straight tube type lens barrel 1, and the other end (right side in the figure).
Eyepiece 3 and a color monitor TV (L
The CDTV) 4 is a telescope type in which a half mirror 5 inclined 45 ° is disposed immediately before the LCDTV 4.

The angle-of-view adjusting lens 2 takes in a direct-view image from the outside in such a manner that its angle of view matches the angle of view of the LCD TV 4. The half mirror 5 transmits the direct-view image captured by the angle-of-view adjustment lens 2 toward the other end, and
4 reflects the infrared image at right angles toward the other end. Therefore, when the eye 6 is put on the eyepiece 3, a composite image of the visible image and the infrared image can be seen (FIG. 1B). Note that the LCD TV 4 is configured such that the screen is reversed left and right.

FIG. 2 shows a viewfinder for an infrared camera according to a second embodiment of the present invention. As shown in FIG. 2 (a), the viewfinder has an angle-of-view adjustment lens 2 inside one end (left side in the figure) and a second end (left side in the figure) on the second floor side of a lens barrel 21 having a two-story structure. Reflective mirrors 22 are provided on the right side, respectively, so that the direct-view image captured by the lens 2 is reflected at a right angle toward the first floor side. On the first floor side, the LCD TV 4 is provided at one end (left side in the figure) and the other end is provided ( The eyepiece 3 is provided on the right side in the figure, and a half mirror 23 inclined 45 ° in the middle is provided, and is a periscope type.

The half mirror 23 transmits the infrared image projected on the LCD TV 4 toward the other end and transmits the infrared image to the reflection mirror 22.
Since the direct-view image from is reflected at a right angle toward the other end,
If an eye 6 is put on the eyepiece 3, a composite image of the visible image and the infrared image can be seen (FIG. 2 (b).
Does not need to flip the screen horizontally.

FIG. 3 shows a viewfinder for an infrared camera according to a third embodiment of the present invention. As shown in FIGS. 3A, 3B, and 3C, the viewfinder includes a first lens barrel 31 fixedly arranged and a second lens barrel 32 having one end rotatably supported in a cylindrical shape. Are connected in a two-story form with the bellows 33 of FIG.

The first lens barrel 31 is provided with an angle-of-view adjusting lens 2 at one end (left side in the figure) and a first reflection mirror 34 at the other end. Since the bellows 33 connects the other end of the first lens barrel 31 and one end of the second lens barrel 32, the first reflection mirror 3
Reference numeral 4 reflects the direct-view image captured by the lens 2 at right angles so as to pass through the bellows 33 and go to one end of the second lens barrel 32.

The second lens barrel 32 has a second pivot on one end side.
The reflection mirror 36, the eyepiece 3 at the other end, the LCD TV 4 on the side in the middle, and the half mirror 5 (FIG. 3B) are provided immediately before the LCD TV 4.

The second reflecting mirror 36 reflects the direct-view image passing through the bellows 33 at a right angle toward the other end. Further, the half mirror 5 functions similarly to the first embodiment.
That is, the direct-view image from the second reflection mirror 36 is transmitted toward the other end, and the infrared image projected on the LCD TV 4 is reflected toward the other end. Therefore, if the eye 6 of the eyepiece 3 is hit, a composite image of the visible image and the infrared image can be seen.

Here, the second reflecting mirror 36 is rotated in conjunction with the vertical rotation of the second lens barrel 32, for example, but as shown in FIG. 3C, the second lens barrel 32 is rotated. 32 rotation angle α
On the other hand, the rotation angle of the second reflection mirror 36 is reduced so that the rotation angle of the second reflection mirror 36 becomes half α / 2, and the second reflection mirror 36 rotates.

Therefore, since the first lens barrel 31 is fixed,
Even if the second lens barrel 32 is rotated to set an angle at which the observer can easily observe, the eyepiece 3 can always see the initially set visible image.

[0022]

As described above, in the viewfinder for an infrared camera according to the present invention, a composite image of a visible image and an infrared image is made visible when an eyepiece is put on the eyepiece. Color monitor TV for displaying images
And an optical system for taking in a direct-view image from the outside and synthesizing it with an infrared image projected on a color monitor TV, so that it can be configured at low cost and light weight, and can provide a viewfinder suitable for an infrared camera. effective. In addition, the first device is a telescope type, the second device is a periscope type, and the third device is a movable type. As described above, there is an effect that an appropriate configuration can be configured according to the application.

[Brief description of the drawings]

FIG. 1 shows a viewfinder for an infrared camera according to a first embodiment of the present invention, in which (a) is a side sectional view and (b) is a composite image observed from an eyepiece.

2A and 2B show a viewfinder for an infrared camera according to a second embodiment of the present invention, wherein FIG. 2A is a side sectional view and FIG. 2B is a composite image observed from an eyepiece.

3A and 3B show a viewfinder for an infrared camera according to a third embodiment of the present invention, wherein FIG. 3A is a side sectional view, FIG. 3B is a top sectional view, and FIG.

4A and 4B show a viewfinder for a conventional infrared camera, wherein FIG. 4A is a side sectional view and FIG. 4B is an infrared image observed from an eyepiece.

FIG. 5 is an explanatory diagram of a combined display method of a visible image and an infrared image employed in a conventional infrared image device.

[Explanation of symbols]

 1, 21 lens barrel 2 angle of view adjusting lens 3 eyepiece 4 LCD (liquid crystal) TV 5, 23 half mirror 6 eyes 22 reflection mirror 31 first lens barrel 32 second lens barrel 33 bellows 34 first reflection mirror 35 rotation axis 36 Second reflection mirror

Claims (3)

(57) [Scope of request for utility model registration] 1. A color monitor TV for displaying an infrared image in a lens barrel; a lens for adjusting the angle of view of a direct-view image taken from the outside to the color monitor TV; and a red light transmitted through the direct-view image and displayed on the color monitor TV. And a half mirror for combining the two images by reflecting the outside image. 2. A color monitor TV for displaying an infrared image in a lens barrel; a lens for adjusting the angle of view of a direct-view image taken from the outside to the color monitor TV; and a direct-view image captured by the lens is reflected in a right-angle direction. A reflection mirror; and a half mirror that transmits the infrared image projected on the color monitor TV and reflects the direct-view image from the reflection mirror to combine the two images. finder. 3. A fixedly arranged first lens barrel and a second lens barrel, one end of which is rotatably supported by a shaft, are connected by a cylindrical bellows; A first reflection mirror for reflecting a direct-view image captured by the lens in the right-angle direction and passing through the bellows at the other end;
The second lens barrel is provided with a second reflection mirror for reflecting a direct-view image passing through the bellows on a rotation shaft on one end side at a right angle toward the other end side, and projecting an infrared image on a side portion on the way. A color monitor TV is provided, and a half mirror is provided on the way to combine the two images by transmitting the direct-view image from the second reflection mirror and reflecting the infrared image projected on the color monitor TV, and sending the combined image to the other end; A viewfinder for an infrared camera.