JPH06294856A - Image guiding device for homing guiding - Google Patents

Abstract

PURPOSE:To reduce time for searching a target. CONSTITUTION:Light emitted from a target is reflected and focused at an objective concave mirror 2 and enters a half mirror 3 and then is divided into transmission and reflection light. The transmission light is received by an image pick-up device 4 and then a video signal is taken out. The reflection light is received by an image pick-up device 6 via a lens 5 and video signal is taken out. Since the image pick-up device 4 is laid out at the focusing position of the objective concave mirror 2, the light incidence angle of both image pick-up device in the image pick-up device 4 is larger than that in the image pick-up device 6 and then an image with a wider visual field than that obtained by the image pick-up device 6 can be obtained by the image pick-up device 4, namely a narrow visual field image and a wide visual field image can be obtained simultaneously. A target can be detected at an early stage with a wide visual field image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image guiding device for homing guidance.

[0002]

2. Description of the Related Art FIG. 2 shows an image pickup portion of a homing guide image guide device. The image pickup portion 21 is mounted on a gimbal whose angle can be controlled up, down, left and right to achieve spatial stability. . That is, even if the missile equipped with the device is shaken, the direction of the image pickup unit 21 is controlled so as to cancel it and the shake of the image pickup is prevented.

The conventional image pickup section 21 includes an objective concave mirror 2 for reflecting and condensing incident light rays (light rays such as visible rays and infrared rays emitted from a target), and a flat reflecting mirror 7 for reflecting reflected light rays from the objective concave mirror 2. It is composed of a lens 5 which forms an image of the light beam reflected by the plane reflecting mirror 7 at an appropriate focal position, and a (first) image pickup element 6 which is arranged at the focal position of the lens 5.

[0004]

By the way, in the image guiding apparatus for homing guidance, the video signal output from the image pickup device 6 is subjected to image processing to detect the target, and the target is always located at the center of the image obtained by the image pickup device 6. The target is tracked by controlling the direction of the image pickup unit 21 so as to be located, but since the direction of the image pickup unit 21 is similarly moved in the search for detecting the target, the field of view of the image acquired by the image pickup device 6 is the target tracking. In the process of (1), it may not be so wide, but in the process of target detection, it is desired to be as wide as possible because early detection is necessary.

However, there is a problem in that it is difficult to expand the field of view with the configuration of the conventional image pickup section 21 that acquires an image through the lens 5.

The present invention has been made in order to meet such a conventional demand, and its purpose is to provide an image for homing guidance equipped with means capable of acquiring an image of a wider field of view in addition to the field of view conventionally obtained. To provide an induction device.

[0007]

In order to achieve the above object, the homing guidance image guidance apparatus of the present invention has the following configuration. That is, the image guiding apparatus for homing guidance of the present invention appropriately adjusts the objective concave mirror for reflecting and condensing the incident light beam, the plane reflecting mirror for reflecting the light ray reflected by the objective concave mirror, and the light ray reflected by the plane reflecting mirror. In an image guiding apparatus for homing guidance, which comprises an image pickup unit composed of a lens which forms an image at a focal position and a first image pickup element which is arranged at the focal position of the lens; a half mirror is used instead of the plane reflecting mirror. And a second image sensor for receiving the transmitted light of the half mirror is arranged at the focal position of the objective concave mirror.

[0008]

Next, the operation of the homing guidance image guiding apparatus of the present invention constructed as described above will be described. In the present invention,
The optical system of the image pickup section is divided into two systems by a half mirror, and the light reflected by this half mirror is received by the conventional first image sensor and the transmitted light is received by the second image sensor.

Due to the structure, the light incident angles of both image pickup devices are larger in the second image pickup device than in the first image pickup device, and the second image pickup device obtains the light ray incident angle with the first image pickup device. An image with a wider field of view than the image can be obtained.

In short, since the narrow-field image and the wide-field image are obtained at the same time, the target can be detected earlier in the wide-field image, and the target search period can be shortened as compared with the conventional case.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an image pickup unit of a homing guidance image guiding apparatus according to an embodiment of the present invention. The image pickup section 1 is provided with a half mirror 3 in place of the plane reflecting mirror 7 in the conventional image pickup section 21, and a (second) image pickup element 4 for receiving transmitted light of the half mirror 3 is used as a focus of the objective concave mirror 2. It is arranged in a position.

The light beam emitted by the target is reflected and condensed by the objective concave mirror 2, and the reflected light is separated by the half mirror 3 into transmitted light and reflected light. The reflected light is received by the image pickup device 6 via the lens 5 as in the conventional case, and the transmitted light is received by the image pickup device 4 to extract a video signal from each.

Due to the structure, the incident angle of the light rays in the image pickup device 6 and the image pickup device 4 is larger in the image pickup device 4 than in the image pickup device 6, and the image pickup device 4 is wider than the image obtained by the image pickup device 6. An image of the field of view is obtained.

In short, since the narrow-field image is obtained by the image sensor 6 and the wide-field image is obtained by the image sensor 4, the target is detected early in the wide-field image and the tracking is performed by the narrow-field image similar to the conventional one. You can

[0015]

As described above, in the image guiding apparatus for homing guidance of the present invention, the optical system of the image pickup section is divided into two systems by the half mirror, and the light reflected by this half mirror is the same as in the conventional first imaging. The device receives the transmitted light and the transmitted light is received by the second image pickup device, and the second image pickup device obtains an image with a wider field of view than the conventional one. Therefore, since the target search can be performed with an image having a wider field of view than the conventional one, there is an effect that the target search period can be shortened as compared with the conventional one.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an imaging unit of a homing guidance image guidance device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of an imaging unit of a conventional homing guidance image guidance device.

[Explanation of symbols]

 1 Imaging unit 2 Objective concave mirror 3 Half mirror 4 Imaging device 5 Lens 6 Imaging device 7 Planar reflecting mirror

Claims (1)

[Claims] 1. An objective concave mirror for reflecting and condensing an incident light beam,
A flat reflecting mirror that reflects the light rays reflected by this objective concave mirror;
In a homing guidance image guiding apparatus, which includes an imaging unit including a lens that forms an image of a light beam reflected by the plane reflecting mirror at an appropriate focal position and a first imaging element that is arranged at the focal position of the lens. Providing a half mirror in place of the flat reflecting mirror; and arranging a second image pickup element for receiving transmitted light of the half mirror at a focal position of the objective concave mirror; .