JPH08262330A - Rifle scope - Google Patents

Abstract

PURPOSE: To exactly measure a distance with a game so that a shooter can surely snipe the game by measuring a time interval between the outgoing time of a laser beam and the time when a laser beam reflected by the game enters a photodetector. CONSTITUTION: The instruction for turning on a laser is issued to a laser beam source 21 by a laser source control device 31 in order to measure the distance with a game when the image of the game is comfirmed and the laser beam is transmitted from the laser beam source 21. The time when the instruction of turning on the laser beam is issued is sent to a range finding device 33 and time counting is started. The laser beam reflected from the game is made incident on a light receiving element 22, converted to a current, inputted in a receiving light signal amplifier circuit 32, amplified and the time count is finished when the amplified current is inputted to the range finding device 33. Consequently, the elapsed time between the time issuing the instruction and the time when the light signal amplifier circuit 32 sends the current to the range finding device 33 is obtained and the distance with the game is obtained instantenously by substituting the time for a prescribed equation.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a riflescope for use in a gun.

[0002]

2. Description of the Related Art For example, when trying to catch a prey such as an animal by using a firearm such as a rifle, a rifle scope is used to increase the hit rate. With the riflescope, you can see the prey magnified more than you can see it. As a result, the muzzle could be aimed more accurately in the direction of the prey, and the accuracy could be increased. Whether to trigger the gun toward the prey reflected in the rifle scope was estimated by estimating the distance to the prey from the size of the prey reflected in the rifle scope based on the intuition and experience of the shooter It was determined by whether the distance was within the range of the gun. Also, when the distance to the prey is long, the flight trajectory of the bullet draws a parabola, so the position of the reticle where the aiming point is shown is finely adjusted to correct the direction of the muzzle.

[0003]

However, since the distance to the prey was estimated from the size of the prey reflected in the rifle scope by the intuition and experience of the shooter, the distance was often mistaken. If you miss the distance, the flight trajectory of the bullet deviates from the correct trajectory, or if the actual distance to the prey is longer than the range of the firearm, the bullet cannot reach the prey, or even if it can reach it It was difficult to reliably catch the prey because the bullets had lost enough speed to kill.

It is an object of the present invention to provide a riflescope having a function of accurately measuring a distance to a prey so that a shooter can aim and shoot the prey surely.

[0005]

A light source for emitting laser light, an optical path splitting means for transmitting visible light and reflecting the laser light, and an objective lens for condensing the visible light and the laser light. An eyepiece lens for observing an image of visible light condensed by the objective lens, a light receiving element for receiving the laser light reflected by a target object and condensed by the objective lens, and the laser light are The measuring means measures the time from the emission of the laser light source to the incidence on the light receiving element, and the calculating means calculates the distance to the target object using the measured time.

[0006]

In the present invention, laser light is emitted from the laser light source incorporated in the riflescope toward the prey, which is the target, and the laser light reflected by the prey is again guided into the riflescope, and the light receiving element is used. Receiving light. By measuring the time from when the laser light is emitted from the laser light source to when it is reflected by the prey and is incident on the light receiving element, the distance to the prey can be measured in an extremely short time and with high accuracy.

[0007]

1 is a vertical sectional view of a riflescope according to this embodiment. The objective lens 11 is a lens for emitting laser light from the inside of the riflescope and for letting in natural light or laser light reflected by the prey from the outside, and the dichroic prism 13 is an optical for transmitting natural light and reflecting laser light. Elements, an erecting lens 16 is a lens for returning an image inverted by the objective lens 11 to an erect image, a reticle 12 is a plate on which a sighting point for aiming at a prey is displayed, and an eyepiece lens 15
Is a lens for observing the image of the prey incident from the objective lens 11. The above components are the same as those of the conventional rifle scope.

The laser light source 21 is a light source for emitting a pulse laser, and the laser light source control device 31 is a laser light source 21.
A device for controlling the turning on and off of the pulse laser, the half beam splitter 14 reflects the laser light emitted from the light source 21, and the laser light reflected by the prey which is the target and returned to the rifle scope. An optical element for transmitting light, a light receiving element 22 is an element for receiving the laser light returned to the inside of the riflescope, and converting the received light into an electric current, and the light receiving signal amplification circuit 32 is the light receiving element 2
A circuit for amplifying the weak signal converted by 2.
The distance calculation device 33 measures the time from the moment when the laser light source control device 31 controls the laser light source 21 to turn on the laser to the moment when the light reception signal is input to the light reception signal amplification circuit 32. A device for obtaining the distance to the prey, a worm rack gear 24 is a gear for moving the lens barrel in which the reticle 12 is housed up and down, a motor 23 is a motor for driving the worm rack gear 24, and a display unit 34 is a distance calculation device. 33 is a display unit for displaying the result obtained by 33.

When the riflescope is aimed at the prey which is the target, the natural light incident from the objective lens 11 passes through the dichroic prism 13 and goes to the erecting lens 16. Since the image of the prey is turned upside down by the objective lens 11, the image of the prey is confirmed by the eyepiece lens 15 after being made upright by the erecting lens 16. When the image of the prey is confirmed, the laser light source control device 31 issues a laser lighting command to the laser light source 21 in order to measure the distance to the image. Upon receiving the command, the laser light source 21 emits laser light. The distance calculation device 33 is informed of the time when the laser light source control device 31 issues a laser lighting command to the laser light source 21, and starts timing. The laser light emitted from the laser light source 21 is reflected by the half beam splitter 14,
Heading to the dichroic prism 13. The laser light reflected again by the dichroic prism 13 is the objective lens 1
It will pass 1 and proceed through the atmosphere toward the prey. The laser light reflected by the prey returns to the atmosphere and enters the objective lens 11. The incident laser light is reflected upward by the dichroic prism 13, passes through the half beam splitter 14, and enters the light receiving element 22. The laser light incident on the light receiving element 22 is converted into a current and enters the light receiving signal amplifier circuit 32, where it is amplified. When the amplified current enters the distance calculation device 33, the clocking ends. Then, the elapsed time from when the laser light source control device 31 issues a laser lighting command to the laser light source 21 to when the current amplified by the received light signal amplification circuit 32 is sent to the distance calculation device 33 is obtained. By substituting this elapsed time into the arithmetic expression (elapsed time * light speed * 0.5), the distance to the prey can be instantly obtained. Here, the obtained distance information is displayed on the display unit 34 in real time. at the same time,
Whether the calculated distance is within the range,
For example, if it is within the range, it can be displayed by ◯, and if it is within the range, it can be displayed by x.

FIG. 2 is a view looking through the eyepiece lens 15 showing the measured distance to the prey and the judgment as to whether or not the measured distance is within the range. If it is within the range, the parabolic trajectory drawn by the bullet is predicted, and the deviation of the vertical aiming point is corrected. The reticle 12 and the display section 34 are moved by the motor 23 and the worm rack gear 24 to automatically correct them.

[0011]

As described above, according to the present invention, it is possible to provide a riflescope having a function of accurately measuring the distance to a prey so that a shooter can surely aim and hit the prey. Further, since the riflescope optical system and the distance measuring optical system are shared, the device can be downsized. Furthermore, if the display unit is placed in the field of view of the eyepiece, the distance information to the prey can be obtained instantly without taking the eye away from the eyepiece, which enables quick judgment and further increases the hit rate. it can.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a riflescope according to the present embodiment.

FIG. 2 is a view looking through the eyepiece lens 15 showing the display of the measured distance to the prey and the judgment as to whether or not the measured distance is within the range.

[Explanation of symbols]

 11 ... Objective lens 12 ... Reticle 13 ... Dichroic prism 14 ... Half beam splitter 15 ... Eyepiece 16 ... Erecting lens 21 ... Laser light source 22 ... Light receiving element 23 ... Motor 24 ... Worm rack gear 31 ... Laser light source control device 32 ... Light receiving signal amplification circuit 33 ... Distance calculation device 34 ... Display unit

Claims (7)

[Claims] 1. A light source for emitting laser light, an optical path splitting means for transmitting visible light and reflecting laser light, an objective lens for condensing the visible light and the laser light, and the objective lens. An eyepiece lens for observing an image of the condensed visible light, a light receiving element that receives the laser light reflected by a target object and condensed by the objective lens, and the laser light serves as the laser light source. A rifle comprising: a measuring unit that measures a time from emission to an incident on the light receiving element; and a calculating unit that calculates a distance to the target object by using the measured time. Scope. 2. A light source for emitting laser light, an optical path splitting means for transmitting visible light and reflecting laser light, an objective lens for condensing the visible light and the laser light, and the objective lens. An eyepiece for observing the image of the collected visible light, a reticle displaying an aiming point for aiming at a target, and a reticle reflected by the target and collected by the objective lens. A light receiving element that receives the laser light, a measuring unit that measures the time from the emission of the laser light from the laser light source to the incidence of the laser light, and the target object using the measured time. And a aiming point correcting means for correcting the position of the aiming point displayed in the reticle according to the distance to the target object. The rifle score featuring
Pu. 3. The rifle according to claim 1, further comprising: a determination unit that determines whether or not the target object is within a range based on the distance to the target object calculated by the calculation unit. scope. 4. The riflescope according to claim 2, wherein the distance to the target object calculated by the calculation means is displayed in the reticle. 5. The riflescope according to claim 3, further comprising a transmission means for transmitting a result discriminated by the discrimination means to the shooter by voice, display or vibration. 6. The rifle according to claim 2, further comprising a determination unit that determines whether or not the target object is within a range based on the distance to the target object calculated by the calculation unit. scope. 7. The riflescope according to claim 6, wherein the result discriminated by the discriminating means is displayed in the reticle.