JP2003090698A - Small arm sighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To resolve a problem that an operator can not hit a target by a bullet when the target is small due to a distance between the sighting axis of a small arm sighting device and the firing axis of a small arm even when the operator of the small arm is sighting while superposing the target on an sighting reticle. SOLUTION: The small arm sighting device is provided with a target distance inputting means and a sighting reticle position correcting means for indicating the sighting reticle while correcting the position of the same downward by a picture element given by a value of ΔH.f/(R.s) from the position of the picture element showing the direction of the firing axis. In this case, a distance to the target is shown by R, a distance between the sighting axis of the small arm sighting device and the firing axis of the small arm is shown by ΔH, the vertical size of one picture element of an image element in the small arm sighting device is shown by s and the focal length of an optical system is shown by f.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small firearm aiming device which uses an image pickup device composed of two-dimensional pixels and which is attached to a small firearm and aims at a target by an aiming reticle superimposed and displayed on an image.

[0002]

2. Description of the Related Art FIG. 8 is a system diagram showing a conventional small arms sighting device. In the figure, 1 is a small firearm, 2 is an image pickup device for outputting a video signal having an aiming reticle for aiming at a target, 3 is a fixing portion for fixing the image pickup device 2 to the small firearm 1,
Reference numeral 4 is a display for displaying a video signal, 5 is an eyepiece for enlarging the screen of the display 4, and the display 4 and the eyepiece 5 constitute a viewfinder 6. The viewfinder 6 is usually fixed to the housing of the imaging device 2 or integrated with the housing.

Next, the operation will be described. FIG. 9 is a diagram showing how the operator is aiming at the target. In FIG. 9, 9 is a target, 11 is an aiming axis indicating a direction aimed by the operator,
Reference numeral 12 is a shooting axis that indicates the shooting direction of the bullet. The operation of the operator aiming at the target will be described below. The operator can see an enlarged image of the display screen of the display device 4, that is, an aiming screen by looking into the eyepiece 5 of the viewfinder 6. Figure 1
0 shows an example of the aiming screen seen by the operator. In FIG. 10, 7 is an enlarged image of the display screen, and 8 is an aiming reticle. The aiming reticle 8 normally has a cross shape, and the center of the cross shape is the direction aimed by the operator, that is, the aiming axis 11. On the other hand, the shooting direction of the bullet of the small firearm 1, that is, the shooting axis 12 is the sighting axis 11
Set in the same direction as. That is, as shown in FIG. 9, the two axes are parallel to each other. The operator operates the small firearm 1 so that the center of the aiming reticle 8 overlaps the target 9.
As shown in FIG. 9, the target 9 can be caught on the shooting axis 12, and a bullet can hit the target 9.

Now, the operation of the operator looking at the enlarged image 7 on the display screen of the display 4 will be described. In the small firearm sighting device, a very small display 4 is used, and the eyepiece 5 enlarges the display screen of the display 4 located at a distance L1 from the operator's eyes and separates it from the operator's eyes by a distance L2. The enlarged image 7 of the display screen is generated at the position. FIG. 11 shows the relationship between the display screen of the display 4 and the enlarged image 7 of the display screen. In FIG. 11, 1
6 is a display screen of the display 4. The ratio of the angle A1 at which the operator looks at the display screen 16 of the display 4 and the angle A2 at which the magnified image 7 of the display screen 16 is viewed is the magnifying power of the eyepiece lens 5,
The operator sees a magnified image 7 of the display screen 16 of the display 4 magnified A2 / A1 times by the eyepiece lens 5.

[0005]

In the conventional small arms sighting apparatus, the operator aims at the target 9 by looking at the enlarged image 7 of the display screen 16. However, the image pickup apparatus 2 has an image pickup element including two-dimensional pixels. Since it is used, the minimum unit of the fineness of the enlarged image 7 of the display screen 16 corresponds to one pixel of the image sensor. If the magnifying power of the eyepiece lens 5 is too large, the operator can clearly recognize one pixel, which is the smallest unit of fineness, as a shape on the magnified image 7 of the display screen 16, and the magnified image 7 of the display screen has a mosaic shape. It becomes a difficult image of. If the magnification of the eyepiece lens 5 is too small, one pixel is less than or equal to the resolution of the eye depending on the operator's visual acuity, and two or more pixels are recognized as one pixel, and the magnified image 7 of the display screen 16 is a blurred image. There was a problem. FIG. 12 shows an example of an image recognized by the operator.
FIG. 12 is an example showing how a triangular target image is recognized by the operator, and (a) is a target image to be recognized,
(B) is a target image in which one pixel is recognized as a shape and a hatched portion is recognized in a mosaic shape, and (c) is a target image in which two or more pixels are recognized as one pixel and a contour is recognized as blurred.

Further, in the conventional small arms sighting device,
As shown in FIG. 9, the sighting axis 11 and the shooting axis 12 are set parallel to each other, but the distance between the two axes is the size of the fixed part 3 and the imaging device 2.
It will be separated by about 100 mm or more from the case size. For this reason, as shown in FIG. 13, when the operator aims at a minute target 9 smaller than the above-mentioned axial distance with the aiming reticle 8, the shooting axis 12 deviates from the target 9 and the target 9 is hit even when shooting. There was a problem that it did not exist.

The present invention has been made to solve the above problems, and can provide an easy-to-see aiming screen that does not depend on the operator's visual acuity, and is also a small firearm aiming device capable of shooting a minute target. Is proposed.

[0008]

A small arms sighting device according to a first aspect of the present invention comprises an image pickup device and a viewfinder comprising an indicator and an eyepiece for enlarging a display screen of the indicator to generate a magnified image. The above-mentioned eyepiece lens is provided with a magnifying power adjusting means.

A small firearm sighting device according to a second aspect of the present invention is a view including an image pickup device having a two-dimensional image pickup device, a display device, and an eyepiece for enlarging a display screen of the display device to generate a magnified image. A viewfinder and input means for inputting the distance to the target, the distance to the target is R, the distance between the aiming axis and the shooting axis is ΔH, the vertical size of one pixel of the image pickup device is s, and the optics of the image pickup apparatus If the focal length of the system is f,
The aiming reticle is ΔH · f from the position of the pixel indicating the radial direction.
The aiming reticle position correcting means is provided to correct downward by the pixel amount given by / (R · s).

Further, a small arms sighting device according to a third aspect of the present invention comprises means for inputting a distance to a target according to the second aspect of the invention.
The rotary switch is installed on the right side or the top side of the housing of the image pickup device in the target direction and has a plurality of contacts corresponding to a specific distance.

A small firearm sighting device according to a fourth aspect of the present invention comprises means for inputting a distance to a target according to the second aspect of the invention.
It is composed of a numeric keypad equipped with a detachable cable to the image pickup device.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is a system diagram showing a first embodiment of the present invention. In FIG. 1, 1 is a small firearm, 2 is an image pickup device which has a two-dimensional pixel image pickup element, and which outputs an image signal on which an aiming reticle 8 for aiming a target 9 is output, and 3 is a small firearm 1 and the image pickup device 2 is attached. A fixed part for fixing, 4 is a display for displaying a video signal, 5 is an eyepiece for enlarging the screen of the display 4, 17 is a magnification adjusting means provided in the eyepiece 5, and the display 4 and the eyepiece are provided. 5
Constitutes the viewfinder 6. Viewfinder 6
Is usually fixed to the housing of the imaging device 2 or integrated with the housing. The operation of the operator looking into the eyepiece lens 5 and aiming the target 9 with the aiming reticle 8 is similar to that of the conventional small arms sighting device, and therefore its explanation is omitted. However, in the present invention, the magnification magnification adjustment provided in the eyepiece lens 5 is adjusted. The size of the magnified image 7 on the display screen 16 of the display 4 can be adjusted by the means 17. The enlargement magnification adjusting means 17 can be realized by providing the eyepiece lens 5 with a zoom mechanism as used in a photographic lens.

FIG. 2 is a view showing a state in which the operator is looking at the enlarged image 7 of the display screen 16 of the display 4 by the viewfinder 6. Now, the image pickup device of the image pickup device 2 is a vertical M pixel,
If it is composed of two-dimensional pixels of horizontal N pixels, the enlarged image 7 of the display screen 16 becomes a mosaic image of vertical M pixels and horizontal N pixels if the magnification of the eyepiece lens 5 is sufficiently large, and conversely the magnification is increased. If it is insufficient, the operator's visual acuity is limited, and the operator cannot recognize each pixel, resulting in a blurred image. The angles α and β in FIG. 2 are angles at which the operator looks at the vertical and horizontal directions of one pixel on the magnified image 7 of the display screen 16. The operator can adjust the angle α and the angle β by adjusting the size of the enlarged image 7 by using the enlargement magnification adjusting means 17. Therefore, the operator is
It is possible to obtain the enlarged image 7 of the display screen 16 which is easy to see and which does not have an excessive mosaic shape and is not blurred.

Normally, the visual acuity of a person is 1 as a standard, but since the visual acuity 1 is defined by the angular resolution of the eye for 1 minute, the magnifying power adjusting means 17 uses the angle α or the angle β.
Alternatively, it is appropriate to have an adjustment range in which the angle of seeing the diagonal of the pixel can be set to about 1 minute.

Embodiment 2. FIG. 3 is a system diagram showing a second embodiment of the present invention. In FIG. 3, 1 is a small firearm, 2
Is an image pickup device that has a two-dimensional pixel image pickup device and outputs a video signal on which an aiming reticle 8 for aiming at a target 9 is output, 3 is a fixed part that fixes the image pickup device 2 to the small firearm 1, and 4 is a display device Reference numeral 5 denotes an eyepiece lens for enlarging the screen of the display device 1,
Reference numeral 3 is a distance input means, 18 is a video signal having the aiming reticle 8 from the image pickup device 2, and the distance to the target input by the distance inputting means 13, and corrects the position of the aiming reticle 8 according to the distance. It is an aiming reticle position correcting means, and the display 4 receives and displays a video signal having the aiming reticle 8 whose position is corrected by the aiming reticle position correcting means 18. The distance input means 13 is usually fixed to the housing of the imaging device 2 or integrated with the housing. In addition, the aiming reticle position correcting means 18 includes the image pickup device 2 or the display device 4.
Built into. Further, the display 4 and the eyepiece 5 form a viewfinder 6, and the viewfinder 6 is usually fixed to the housing of the image pickup apparatus 2 or integrated with the housing.

The operation of the operator looking through the eyepiece 5 and aiming the target 9 with the aiming reticle 8 is the same as in the conventional small firearm aiming apparatus, and a description thereof will be omitted. Next, the means for correcting the position of the aiming reticle 8 by the aiming reticle position correcting means 18 according to the distance to the target received from the distance inputting means 13 will be described. FIG. 4 is a diagram showing the configuration of the second embodiment of the present invention and the relationship with the target. Figure 4
In the above, since the same or corresponding portions as those of the conventional small arms sighting apparatus shown in FIG. 9 are designated by the same reference numerals, the description of the same reference numerals will be omitted. Reference numeral 10 is an optical system which is a part of the image pickup apparatus 2, and 13 is a distance input means integrated in the housing of the image pickup apparatus 2. In the figure, R is the distance from the small weapon aiming device to the target, ΔH is the distance between the aiming axis 11 and the aiming axis 12, and θ is the aiming axis 1.
2 is the angle of deviation between the sighting axis 11 and the direction of looking at the target 9 above. In order to hit a small target 9 at a distance R from FIG. 4, it is necessary to direct the sighting axis 11 downward by an angle θ.

The angle θ is given by ΔH / R, while
The vertical angular resolution corresponding to one pixel of the image displayed on the display unit 4 is s / f, where s is the vertical size of one pixel of the image sensor of the imaging device 2 and f is the focal length of the optical system 10. Given in. Therefore, in order to direct the aiming axis 11 downward by the angle θ, the position of the aiming reticle 8 superposed on the video signal from the image pickup device 2 by the aiming reticle position correcting means 18 is Δs = ΔH, as shown in FIG.・ F / (R ・
s) The correction aiming reticle 14 may be shifted downward by pixels. By aiming the target with the correction aiming reticle 14, there is an effect that it is possible to hit a small target 9 with a bullet.

In order to obtain the distance R to the target 9,
Use a range finder or other survey method separately. Further, the distance input means 13 may be a numeric keypad or the like capable of inputting numerical values.

Embodiment 3. Embodiment 3 of the present invention
In the second embodiment, a rotary switch having a plurality of contacts is used as the distance input means 13, and a specific distance is associated with each contact of the rotary switch. FIG. 6 shows an example in which the rotary switch 15 is attached to the side surface of the image pickup apparatus 2. By turning the knob of the rotary switch 15, a plurality of distances can be selected. By the way, since the operator supports the small firearm 1 with the left hand, it is necessary to operate the rotary switch 15 with the right hand. Therefore, the rotary switch 15 is installed on the right side surface or the upper surface of the imaging device 2 in the target direction in order to improve operability.

When an infrared image pickup device or a night-vision device is used as the image pickup device 2 and the target is aimed at night, the input device such as a ten-key pad as the distance input device 13 makes it difficult to input numerical values in the dark. The present invention has the effect of improving the operability associated with inputting the distance in the dark.

Fourth Embodiment Embodiment 4 of the present invention
In the second embodiment, the distance input means 13 is composed of a ten-key pad equipped with a detachable cable to the image pickup apparatus 2. FIG. 7 shows the configuration. In FIG. 7, 19 is a numeric keypad and 20 is a cable. The cable 20 allows the numeric keypad 19 to be attached to and detached from the imaging device 2 via a connector.

Since the surveyor who measures the distance R to the target 9 and the operator of the small firearm 1 are different from each other, the operator is informed of the distance R by voice or the like by the surveyor, and the operator himself inputs the distance.
Input the distance R by 3. In the present invention, since the numeric keypad 19 is separated from the imaging device 2 by the cable 20, the surveyor can directly input the measured distance R by directly operating the numeric keypad 19, so that the operator of the small firearm 1 can set the target 9
There is an effect that you can concentrate on the aim of. Further, when the target 9 is large, the imaging device 2 is smaller and lighter than when the distance input device 13 is fixed to or integrated with the housing of the imaging device 2 by removing the unnecessary distance input device 13. It has the effect of improving the operability.

[0023]

According to the first aspect of the invention, the operator adjusts the size of the aiming image by using the magnification adjusting means, so that the operator does not have an excessive mosaic shape regardless of the visual acuity of the operator, and There is an effect that it is possible to obtain an easy-to-see aiming image without blurring.

According to the second aspect of the invention, means for inputting the distance to the target is provided, and the position of the aiming reticle is changed to ΔH · f / (R ·
Since the pixel is corrected downward by the amount given by s), there is an effect that the bullet can hit a minute target.

According to the third invention, the rotary means having a plurality of contact points, in which the means for inputting the distance to the target in the second invention is installed on the right side surface or the upper surface in the target direction of the casing of the image pickup apparatus. Since it is composed of a switch, there is an effect that the operability related to the input of the distance in the dark can be improved.

According to the fourth invention, since the input means for the distance to the target in the second invention is constituted by a ten-key pad connected to the image pickup device by a detachable cable, the surveyor of the distance to the target can use the ten-key pad. Since it is possible to operate and input, the operator of the small firearm can concentrate on the aim of the target. Further, since the input means for the distance to the target can be removed, the size and weight of the imaging device can be reduced and the operability can be improved as compared with the case where the distance input means is fixed to or integrated with the housing of the imaging device. effective.

[Brief description of drawings]

FIG. 1 is a system diagram showing a first embodiment of a small arms sighting device according to the present invention.

FIG. 2 is a diagram showing a state in which an enlarged image of a display screen is viewed by the viewfinder according to the first embodiment of the small arms sighting device according to the present invention.

FIG. 3 is a system diagram showing a second embodiment of a small arms sighting device according to the present invention.

[Fig. 4] Fig. 4 is a diagram showing a configuration of a small arms sighting device according to a second embodiment of the present invention and a relationship with a target.

FIG. 5 is a diagram showing a display screen of a second embodiment of a small arms sighting device according to the present invention.

FIG. 6 is a view showing a mounted state of a rotary switch according to a third embodiment of the small arms sighting device of the present invention.

FIG. 7 is a diagram showing a configuration of a fourth embodiment of a small arms sighting device according to the present invention.

FIG. 8 is a system diagram showing a conventional small arms sighting device.

FIG. 9 is a view showing a state in which an operator is aiming at a target with a conventional small arms sighting device.

FIG. 10 is a diagram showing an example of an enlarged image of a display screen of a conventional small arms sighting device.

FIG. 11 is a diagram showing a relationship between a display screen and a magnified image of the display screen of a conventional small arms sighting device.

FIG. 12 is a diagram showing an example of an image recognized by an operator with a conventional small arms sighting device.

FIG. 13 is a diagram showing a case where an operator aims at a small target with a conventional small arms sighting device.

[Explanation of symbols]

1 small firearm, 2 imaging device, 3 fixed part, 4 display,
5 eyepiece lens, 6 viewfinder, 7 enlarged image of display screen, 8 aiming reticle, 9 target, 10 optical system, 11 aiming axis, 12 aiming axis, 13 distance input means, 14 correction aiming reticle, 15 rotary switch, 16 Display screen, 17 Enlarging magnification adjusting means, 18
Aiming reticle position correction means, 19 numeric keypad, 20 cable

Claims (4)

[Claims] 1. An image pickup device for generating a target video signal by using an image pickup device composed of two-dimensional pixels and superimposing and outputting an aiming reticle on the video signal, and a display device for receiving and displaying the output of the image pickup device. A viewfinder comprising an eyepiece for enlarging a display screen of this display device to generate a magnified image, and a small arms sighting device including a fixing portion for mounting the image pickup device on a small firearm, in which magnification magnification adjustment is performed on the eyepiece lens. A small firearm sighting device comprising means. 2. An image pickup device for forming a target image signal by forming an image of a target image on an image pickup device comprising two-dimensional pixels by an optical system and superimposing an aiming reticle on the image signal and outputting the image signal. Small firearm sighting device including a viewfinder including an indicator for receiving and displaying the output of the device and an eyepiece for enlarging a display screen of the display to generate a magnified image, and a fixing portion for mounting the imaging device on the firearm. , The distance to the target is R, the distance between the aiming axis and the shooting axis is ΔH, the vertical size of one pixel of the image sensor is s, and the focal length of the optical system is f. Then, the aiming reticle position correcting means for correcting the aiming reticle below the position of the pixel indicating the radial direction by a pixel given by ΔH · f / (R · s) is provided. Firearm sighting Location. 3. A means for inputting the distance to the target is a rotary switch which is installed on the right side surface or the upper surface of the casing of the image pickup apparatus in the target direction and has a plurality of contacts corresponding to a specific distance. The small firearm sighting device according to claim 2, wherein the device is configured. 4. The small arms sighting device according to claim 2, wherein the input means for the distance to the target is constituted by a ten-key pad provided with a cable detachable from the image pickup device.