USRE47256E1 - Dot sighting device with large caliber - Google Patents

Dot sighting device with large caliber Download PDF

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Publication number
USRE47256E1
USRE47256E1 US15/879,426 US200815879426A USRE47256E US RE47256 E1 USRE47256 E1 US RE47256E1 US 200815879426 A US200815879426 A US 200815879426A US RE47256 E USRE47256 E US RE47256E
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Prior art keywords
reticle
sighting device
rotation axis
dot sighting
selection unit
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US15/879,426
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English (en)
Inventor
In Jung
Dong Hee Lee
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Dongin Optical Co Ltd
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Dongin Optical Co Ltd
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Priority to US15/879,426 priority Critical patent/USRE47256E1/en
Assigned to JUNG, IN reassignment JUNG, IN ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, DONG HEE
Assigned to DONGIN OPTICAL CO., LTD. reassignment DONGIN OPTICAL CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JUNG, IN
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G1/00—Sighting devices
    • F41G1/30—Reflecting-sights specially adapted for smallarms or ordnance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G1/00—Sighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G1/00—Sighting devices
    • F41G1/02—Foresights
    • F41G1/033—Foresights adjustable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G1/00—Sighting devices
    • F41G1/06—Rearsights
    • F41G1/16—Adjusting mechanisms therefor; Mountings therefor
    • F41G1/20—Adjusting mechanisms therefor; Mountings therefor coarse and fine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G1/00—Sighting devices
    • F41G1/06—Rearsights
    • F41G1/16—Adjusting mechanisms therefor; Mountings therefor
    • F41G1/28—Adjusting mechanisms therefor; Mountings therefor wedge; cam; eccentric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G1/00—Sighting devices
    • F41G1/38—Telescopic sights specially adapted for smallarms or ordnance; Supports or mountings therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G1/00—Sighting devices
    • F41G1/46—Sighting devices for particular applications
    • F41G1/473—Sighting devices for particular applications for lead-indicating or range-finding, e.g. for use with rifles or shotguns
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
    • G02B23/10—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors reflecting into the field of view additional indications, e.g. from collimator
    • G02B23/105—Sighting devices with light source and collimating reflector
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/30—Collimators

Definitions

  • the present invention relates to a sighting device installed in a heavy machine gun, and more particularly, to a dot sighting device with large caliber for binocular vision.
  • Characteristics of a rifle or heavy machine gun are determined according to whether the user wants to rapidly sight and fire and whether the user wants to accurately sight a target.
  • rifles or heavy machine guns sight a target by aligning a line of sight of a rear sight and a front sight. The sighting performed by the aligning of the line of sight of the front sight positioned at an end of a gun barrel and the rear sight positioned at an upper portion of a gun body allows the user to accurately fire according to their ability.
  • a sighting device equipped with a telephoto lens has been proposed.
  • an optical sighting device equipped with a telephoto lens is sensitive to even small vibrations when magnification increases due to the use of the telephoto lens.
  • Optical dot sighting devices with no magnification can simply and rapidly sight a target, and are very useful in urgent situations or for short distances.
  • time spent in alignment of the line of sight can be saved, sighting is itself performed such that a dot image is positioned to coincide with a target, and thus the user does not have to devote all of their attention to the alignment of the line of sight.
  • rapid and accurate sighting are possible, and attention can be focused on other urgent situations.
  • dot sighting devices are devices for monocular vision in which a user has to watch a sight mirror with only one eye. Thus, it takes a long time to sight a target, and visual problems also occur.
  • FIG. 1 is a schematic cross-sectional view of a conventional dot sighting device 1 for monocular vision.
  • the inside of the dot sighting device 1 is aligned using a rifle barrel alignment terminal 3 through a fixed grille 11 , and then light emitted from a LED light source 5 is reflected from a reflection mirror 7 , whereby an observer confirms an object with one eye.
  • a front surface (inside of the sighting device) of the reflection mirror 7 is coated in order to reflect the light emitted from the LED light source 5 , and curved surfaces of the front surface and a rear surface of the reflection mirror 7 are spherical, and have the same curvature.
  • a dot image reflected from the reflection mirror 7 is sighted to coincide with a target object viewed through a protective window 9 at no magnification, whereby a user fires at the target object when the dot image reflected from the reflection mirror 7 coincides with the target object.
  • the sighting can be easily performed.
  • the light irradiated from the LED light source 5 disposed in the dot sighting device 1 is reflected from the reflection mirror 7 , and incident on the eye of an observer in parallel.
  • the direction in which the parallel light is reflected should coincide with a bullet firing axis of a gun barrel. If the parallel degree of the dot sighting device 1 does not coincide with the bullet firing axis of the gun barrel, a user cannot hit the target object even when a dot of the light irradiated from the LED light source 5 coincides with the target object.
  • the rifle barrel alignment terminal 3 having vertical and horizontal adjustment functions is operated to coincide an optical axis of an inner barrel with the bullet firing axis of the gun barrel.
  • FIG. 2 is a schematic view illustrating the case in which parallax occurs in the conventional dot sighting device of FIG. 1 .
  • the width of the reflection mirror 7 is not greater than a distance between pupils of a user, binocular vision obtained by overlapping of both eyes does not exist.
  • the external object is viewed by an eye superior to the other eye, or double vision of the object occurs.
  • eye strain is caused by not being able to accurately obtain information on the external object.
  • FIG. 2 illustrates parallax in which light rays reflected from a general spherical reflection surface are not parallel to each other.
  • the light irradiated from the LED light source uses a single reticle, and thus the same dot with respect to all targets is always formed.
  • targets of a heavy machine gun such as human, tanks, and aircraft each have different characteristics. For example, in the case of firing at aircraft, sighting and firing should be performed taking into consideration the velocity of the aircraft. Thus, in a conventional dot sighting device, it is difficult to perform accurate sighting and firing taking into account characteristics of targets.
  • the present invention provides a dot sighting device with large caliber in which binocular vision is possible.
  • the present invention also provides a dot sighting device with large caliber that can prevent occurrence of parallax through a reflection mirror.
  • the present invention also provides a dot sighting device that can sight a target rapidly, taking into account a change of a bullet path according to a distance to the target.
  • the present invention also provides a dot sighting device that can rapidly sight a target by using a dot image that uses a reticle corresponding to characteristics of the target according to the target.
  • a dot sighting device comprising: a reflection mirror; an illumination having a LED irradiating light to the reflection mirror and a transparent reticle that is positioned in front of the LED and forms a dot image by transmitting the light irradiated from the LED; and a fixed grille formed on a lower portion of the dot sighting device, wherein the dot sighting device is attached to and detached from a mount for a heavy machine gun by the fixed grille, and a width X of the reflection mirror is greater than a distance Y between both eyes of a user.
  • the dot sighting device may further comprise a reticle selection unit connected to the illumination unit, wherein the transparent reticle is formed on a plane perpendicular to a reticle rotation axis that extends from the reticle selection unit and penetrates the illumination unit, thus being able to rotate based on the reticle rotation axis by rotation of the reticle selection unit, and a plurality of reticles according to a target are formed on the transparent reticle on the same radial axis around the reticle rotation axis, and one of the reticles corresponding to the target is selected by rotating the reticle selection unit according to the target.
  • a reticle selection unit connected to the illumination unit, wherein the transparent reticle is formed on a plane perpendicular to a reticle rotation axis that extends from the reticle selection unit and penetrates the illumination unit, thus being able to rotate based on the reticle rotation axis by rotation of the reticle selection unit, and a plurality
  • the dot sighting device may further comprise a reticle selection unit connected to the illumination unit, wherein the transparent reticle is formed on a plane perpendicular to a reticle rotation axis that extends from the reticle selection unit and penetrates the illumination unit, thus being able to rotate based on the reticle rotation axis by rotation of the reticle selection unit, and a plurality of reticles are formed on the transparent reticle on the same radius axis around the reticle rotation axis, wherein the reticles are formed closer to the reticle rotation axis as a distance to the corresponding point of impact is farther, and one of the reticles is selected by rotating the reticle rotation unit according to a distance to the target.
  • a reticle selection unit connected to the illumination unit, wherein the transparent reticle is formed on a plane perpendicular to a reticle rotation axis that extends from the reticle selection unit and penetrates the illumination unit, thus being able to rotate
  • the reticle rotation axis may comprise, around a reticle rotation connection axis, a rotation axis on an illumination unit side having a convex-concave portion with a plurality of convexes-concaves corresponding to a distance to a point of impact; and a rotation axis on a reticle selection unit side that has protrusions coupled to desired convexes-concaves of the convex-concave portion on an end thereof and the other end of which is connected to the transparent reticle, wherein the rotation axis on the illumination unit side and the rotation axis on the reticle selection unit side are separated from each other by pulling the reticle selection unit, and then the reticle selection unit is rotated so as to couple a desired convex-concave corresponding to the distance to the point of impact of the convex-concave portion of the rotation axis on the illumination unit side with the protrusion of the rotation axis on the reticle selection unit side.
  • the dot sighting device may comprise an upper plate and a lower plate, wherein the upper plate comprises a protective window; a reflection mirror; and an illumination unit, and wherein the lower plate comprises: a fixed grille formed on a lower portion of the dot sighting device; a bullet path adjustment handle installed at a side surface of the dot sighting device; an upper/lower click control bolt that connects the upper and lower plates and sets an origin point; a bullet path adjustment body that is accommodated in a bullet path adjustment body accommodation unit formed in the lower plate and is connected to the upper plate by fixing an end on the lower plate side of the upper/lower click control bolt to an upper portion of an upper/lower plate connection rotation axis penetrating a side surface of the lower plate; a bullet path adjustment axis that comprises a bullet path adjustment portion positioned on a bullet path adjustment axis contact portion at an end of the bullet path adjustment body, and penetrates the lower plate, thereby being connected to the bullet path adjustment handle; a connection pin of the bullet path adjustment body and the
  • the reflection mirror may comprise a doublet, each of a first surface and a third surface of the reflection mirror is spherical, and a second surface of the reflection mirror comprises a LED reflection surface, wherein a radius curvature of the first and third surfaces satisfies the following equation:
  • D 1 denotes a refractive power of the first surface
  • D 2 denotes a refractive power of the third surface
  • d denotes a distance between the centers of the first and third surfaces
  • R 1 denotes a radius curvature of the first surface
  • R 3 denotes a radius curvature of the third surface
  • n denotes a refractive index of the material.
  • the second surface may comprise an aspheric surface having a conic coefficient.
  • a dot sighting device with large caliber for a heavy machine gun in which binocular vision is possible can be obtained.
  • a target can be rapidly sighted taking into consideration distance amendment, and thus firing can be performed taking into consideration differences according to a distance of the target.
  • FIG. 1 is a schematic cross-sectional view of a conventional dot sighting device for monocular vision
  • FIG. 2 is a schematic view illustrating the case in which parallax occurs in the conventional dot sighting device of FIG. 1 ;
  • FIG. 3 schematically illustrates a visual problem occurring when a conventional dot sighting device for monocular vision is observed with both eyes;
  • FIG. 4 is a schematic view showing a case when a dot sighting device with large caliber for binocular vision, according to an embodiment of the present invention, is observed with both eyes;
  • FIGS. 5 and 6 are schematic views illustrating a dot sighting device equipped with a reticle selection unit, according to an embodiment of the present invention
  • FIG. 7 is a schematic cross-sectional view for explaining an operating principle of a dot sighting device according to an embodiment of the present invention.
  • FIG. 8 is a schematic cross-sectional view of an illumination unit according to an embodiment of the present invention.
  • FIG. 9 is a schematic view of a revolving transparent reticle according to an embodiment of the present invention.
  • FIG. 10 is a view of a revolving transparent reticle according to another embodiment of the present invention.
  • FIG. 11 is a schematic view of a reticle rotation axis according to an embodiment of the present invention.
  • FIGS. 12 and 13 are schematic views of a dot sighting device with large caliber according to another embodiment of the present invention, in which an optical axis adjustment device is included;
  • FIG. 14 is a schematic assembly view of an optical axis adjustment device according to an embodiment of the present invention.
  • FIGS. 15 and 16 are schematic views for explaining an operating principle of a bullet path adjustment body and a bullet path adjustment axis of the optical axis adjustment device of FIG. 14 , according to an embodiment of the present invention
  • FIG. 17 is a schematic view illustrating a structure of a reflection mirror according to an embodiment of the present invention.
  • FIG. 18 is a schematic view illustrating a structure of a reflection mirror according to another embodiment of the present invention.
  • FIG. 19 illustrates a graph showing Tangential ray aberration degrees in a specific case.
  • FIG. 20 illustrates another graph showing Tangential ray aberration degrees in another specific case.
  • FIG. 21 illustrates yet a further graph showing Tangential ray aberration degrees in yet a further specific case.
  • FIG. 3 illustrates a visual problem occurring when a reflection mirror 15 of a conventional dot sighting device is observed with both eyes 13 .
  • a width X of the reflection mirror 15 is the same as or less than a distance Y between both eyes 13 , diplopia as described above occurs, thereby causing eye strain, and external information acquired by both eyes 13 is distorted.
  • FIG. 4 is a schematic view showing a case when a dot sighting device with large caliber for binocular vision, according to an embodiment of the present invention, is observed with both eyes 13 .
  • a width X of a reflection mirror 16 is greater than a distance Y between both eyes 13 .
  • a right eye view ‘A’ nearly coincides with a left eye view ‘B’ and external information is acquired in an overlapped region of the right eye view ‘A’ and the left eye view ‘B’. That is, since information on external objects is acquired by simultaneously using both eyes 13 , stereoscopic vision, which is an advantage of binocular vision with respect to monocular vision, is possible, and a sense of distance can be maintained.
  • FIGS. 5 and 6 are schematic views illustrating a dot sighting device 2 equipped with a reticle selection unit, according to an embodiment of the present invention.
  • a fixed grille 23 (refer to FIG. 13 ) is fixed to a mount for a heavy machine gun (not shown) with fixing bolts 25 , and a an upper/lower click control bolt 17 and a left/right click control bolt 45 (refer to FIG. 13 ) are used to adjust an origin point a zero point (or set zero).
  • a user confirms an external target through a protective window 27 and a reflection mirror 16 .
  • Light irradiated from an LED light source in an illumination unit 19 forms a dot image on the reflection mirror 16 and is reflected, and the reflected light is incident on eyes of a user, thereby allowing the user to view the dot image.
  • the brightness of the LED light source can be adjusted by a control switch 31 .
  • the LED light source can be driven by a built-in battery in a battery case 29 , or driven with electrical power supplied from an external electrical source.
  • the built-in battery can be charged using an external electrical source.
  • FIG. 7 is a schematic view for explaining an operating principle of an illumination unit 19 and a reflection mirror 16 of a dot sighting device according to an embodiment of the present invention.
  • an illumination device 33 using an LED or the like is installed in the illumination unit 19 , and acts as a light source.
  • Light irradiated from the illumination device 33 is transmitted through a transparent reticle of a revolving transparent reticle 35 disposed in front of the illumination device 33 and is irradiated to the reflection mirror 16 .
  • the light irradiated to the reflection mirror 16 is reflected and incident on eyes of a user, and the user views a transparent reticle-shaped dot.
  • FIG. 8 is a view illustrating in detail an operating principle of a reticle selection unit 21 and the illumination unit 19 of the dot sighting device of FIG. 7 , according to an embodiment of the present invention.
  • the revolving transparent reticle 35 is formed on a plane perpendicular to a reticle rotation axis 37 that extends from the reticle selection unit 21 disposed adjacent to the illumination unit 19 and penetrates the illumination unit 19 .
  • the reticle rotation axis 37 rotates by rotation of the reticle selection unit 21
  • the revolving transparent reticle 35 accordingly rotates.
  • users can select a desired reticle from among various types of reticles formed in the revolving transparent reticle 35 by rotating the reticle selection unit 21 .
  • FIG. 9 is a view of the revolving transparent reticle 35 of the dot sighting device of FIG. 7 , according to an embodiment of the present invention.
  • a variety of reticles 39 A through 39 F are formed in the revolving transparent reticle 35 along a reticle rotation line 40 having a radial axis based on a center axis 37 ′ of the revolving transparent reticle 35 .
  • the sighting should be performed by taking into consideration velocity or the like of the moving target, unlike firing at human.
  • a dot image should be formed by taking such factors into account.
  • Dot images for objects are, in general, largely categorized into dot images for short distances, dot images for long distances, and dot images for anti-aircraft firing.
  • different dot images are used for humans and horses, for tanks, for helicopters, for fighter planes, and the like.
  • a long distance reticle for humans and horses 39 A, a short distance reticle for humans and horses 39 B, a reticle for still vehicles and tanks 39 C, a reticle for moving vehicles and tanks 39 D, a reticle for anti-aircraft helicopters 39 E, and a reticle for anti-aircraft fighter planes 39 F are radially formed along the reticle rotation line 40 .
  • the reticle rotation axis 37 penetrates the center axis 37 ′ of the revolving transparent reticle 35 , and the revolving transparent reticle 35 is fixed to the reticle rotation axis 37 and rotates according to the rotation of the reticle rotation axis 37 .
  • users can rapidly select a reticle for forming a dot image appropriate for a target by rotating the reticle selection unit 21 .
  • sighting and firing can be rapidly and accurately performed.
  • FIG. 10 is a view of the revolving transparent reticle 35 of the dot sighting device of FIG. 7 , according to another embodiment of the present invention.
  • a fired bullet is continuously affected by gravity until the bullet reaches a target.
  • the bullet reaches a position that is different from an originally sighted position. Therefore, to increase accuracy, the distance to the target should be amended while sighting the target, taking into consideration the distance.
  • the sighting baseline 41 is a baseline with respect to a target 100 m away
  • the reticle 39 ′A with respect to the target 100 m away from a shooter is formed on the sighting baseline 41 .
  • the reticle 39 ′B with respect to a target 200 m away from the shooter is formed towards the center axis 37 ′ as much as pre-set distance from the sighting baseline 41 .
  • the reticle 39 ′C with respect to a target 400 m away, the reticle 39 ′D with respect to a target 800 m away, the reticle 39 E with respect to a target 1200 m away, and the reticle 39 ′F with respect to a target 1600 m away are formed towards the center axis 37 ′ as much as pre-set distances.
  • the reticle rotation axis 37 penetrates the center axis 37 ′ of the revolving transparent reticle 35 , and the revolving transparent reticle 35 is fixed to the reticle rotation axis 37 and rotates according to the rotation of the reticle rotation axis 37 .
  • users can rapidly select a reticle for forming a dot image appropriate for a target by rotating the reticle selection unit 21 , taking into consideration a distance to the target.
  • sighting and firing call be rapidly and accurately performed.
  • the center axis 37 ′ of the revolving transparent reticle 35 is formed at the center of the revolving transparent reticle 35 .
  • the center axis 37 ′ can be formed at a position deviated from the center of the revolving transparent reticle 35 in the two examples described above. That is, taking into account the distance to the target, the center axis 37 ′ can be formed at a position that is close to a reticle to be used for a long distance target in advance.
  • a virtual image of a dot should be formed within binocular fixation distance.
  • a change of position should be performed by moving an illumination unit, particularly, a reticle acting as a point light source, forward or backward.
  • a distance of stereoscopic vision in which human eyes can have a three-dimensional effect is about 240 m according to Hermann von Helmholtz.
  • 800 m, 1200 m and 1600 m reticles may be positioned at the focal point of the reflection mirror in order to position a dot image after reflection from the reflection mirror at infinity in front of the eyes, as in the case of the 400 m reticle.
  • FIG. 11 is a schematic view of the reticle rotation axis 37 illustrated in FIG. 8 , according to an embodiment of the present invention.
  • the reticle rotation axis 37 includes a rotation axis 65 on an illumination unit side, which extends from a front surface of the illumination unit 19 , a rotation axis 67 on a reticle selection unit side, and a connection axis 58 of the reticle rotation axis 37 .
  • a revolving transparent reticle is attached to a rear portion of the rotation axis 67 on the reticle selection unit side.
  • convexes-concaves 61 a through 61 c are formed on an end of the rotation axis 65 on the illumination unit side along the circumference thereof.
  • each of the convexes-concaves 61 a through 61 c corresponds to a shift distance according to each of the reticles shown in the table above.
  • Protrusions 63 are formed on an end of the rotation axis 67 on the reticle selection unit side coupled to the rotation axis 65 on the illumination unit side.
  • the rotation axis 65 on the illumination unit side and the rotation axis 67 on the reticle selection unit side are separated from each other, and the protrusions 63 rotate as the rotation axis 67 on the reticle selection unit side rotates by rotating the reticle selection unit 21 .
  • the protrusions 63 are positioned to correspond to the convexes-concaves 61 , which corresponds to a desired shift distance of the reticle, the protrusions 63 and the convexes-concaves 61 are coupled if the reticle selection unit 21 is released.
  • a user can rapidly amend a dot image corresponding to a distance during stereoscopic vision.
  • sighting and firing can be rapidly and accurately performed.
  • FIGS. 12 and 13 are views of dot sighting devices according to other embodiments of the present invention, in which a path of a bullet can be adjusted.
  • the path of the bullet is adjusted by rotating a bullet path adjustment handle 43 instead of using the reticle selection unit.
  • the dot sighting devices according to the current embodiments of the present invention in which the path of the bullet can be adjusted will now be described with reference to the following drawings.
  • FIG. 14 is a schematic assembly view of an optical axis adjustment device according to an embodiment of the present invention.
  • a lower plate 6 illustrated in FIG. 14 is disposed below an upper plate 4 of FIGS. 12 and 13 .
  • a groove in which an upper/lower click control bolt 17 is accommodated is formed in a top surface portion of a bullet path adjustment body 47 , and an upper/lower plate connection rotation axis 49 is inserted through a side surface center portion of the bullet path adjustment body 47 .
  • the upper/lower click control bolt 17 accommodated from the top surface portion of the bullet path adjustment body 47 is fixedly inserted in a center portion groove of the upper/lower plate connection rotation axis 49 .
  • the bullet path adjustment body 47 connected to the upper/lower click control bolt 17 by the upper/lower plate connection rotation axis 49 is accommodated in a bullet path adjustment body accommodation unit 55 formed in the lower plate 6 .
  • the bullet path adjustment body 47 is coupled to the lower plate 6 by a connection pin 59 that penetrates a side surface of the lower plate 6 and couples the bullet path adjustment body 47 with the lower plate 6 .
  • the upper/lower click control bolt 17 can rotate around on (or screw on) the upper/lower plate connection rotation axis 49 , and the bullet path adjustment body 47 can rotate around on the connection pin 59 .
  • the bullet path adjustment body 47 is connected to the upper plate 4 through the upper/lower click control bolt 17 fixed to the upper plate 4 , and is connected to the lower plate 6 by the connection pin 59 .
  • a bullet path adjustment axis 51 passes through the lower plate 6 , passes by and contacts a bullet path adjustment axis contact portion 48 of the bullet path adjustment body 47 , and is connected to the bullet path adjustment handle 43 .
  • a bullet path adjustment portion 53 of the bullet path adjustment axis 51 contacts the bullet path adjustment axis contact portion 48 of the bullet path adjustment body 47 , facing each other.
  • Spring accommodation portions 57 are formed in a top surface of the lower plate 6 , at a position adjacent to the bullet path adjustment body accommodation unit 55 and parallel to the connection pin 59 , as illustrated in FIG. 14 .
  • springs are accommodated in the spring accommodation portions 57 , whereby a repulsive force acts on the upper and lower plates 4 and 6 .
  • a configuration for adjusting the bullet path of the dot sighting device according to the present embodiment will now be described with reference to FIGS. 15 and 16 .
  • FIGS. 15 and 16 are schematic views for explaining an operating principle of a bullet path adjustment body and a bullet path adjustment axis of the optical axis adjustment device of FIG. 14 , according to an embodiment of the present invention.
  • FIG. 16 is a cross-sectional view taken along a line A-B of FIG. 15 .
  • the bullet path adjustment portion 53 comprises a plurality of contact surfaces 53 a through 53 e each having a different normal distance from center of rotation 60 of the bullet path adjustment axis 51 .
  • the springs of the spring accommodation portions 57 push the upper and lower plates 4 and 6 away from each other, and thus a force, directed towards the upper plate 4 from the lower plate 6 acts on the bullet path adjustment body 47 connected to the upper plate 4 by the upper/lower click control bolt 17 . That is, a force that rotates towards causes the upper plate 4 based to rotate upward centering on the connection pin 59 continuously acts on the bullet path adjustment body 47 connected to the upper plate 4 .
  • a distance between the upper plate 4 and the lower plate 6 is changed.
  • the bullet path adjustment axis contact portion 48 of the bullet path adjustment body 47 contacts the contact surface 53 d having a relatively long normal distance from the center of rotation 60 , and then contacts the contact surface 53 a having a relatively short normal distance from the center of rotation 60 , the distance between the upper plate 4 and the lower plate 6 becomes closer. In the opposite case, the distance between the upper plate 4 and the lower plate 6 becomes farther.
  • each of the contact surfaces 53 a through 53 e of the bullet path adjustment portion 53 is formed at a normal distance corresponding to the amendment corrective angle.
  • FIG. 17 is a schematic view illustrating a structure of a reflection mirror according to an embodiment of the present invention.
  • a distance between a LED and a reflection surface is set at 200 mm, and a thickness of the center of the reflection mirror is set at 4.0 mm.
  • a LED dot is reflected from a R 2 surface and emitted to the outside.
  • the LED dot when incident on the reflection mirror, the LED dot is transmitted through a R 1 surface, is reflected from the R 2 surface, and then is transmitted through the R 1 surface again, and consequently, the LED dot is incident on the eyes of an observer. That is, since the LED dot is transmitted through the R 1 surface twice and is transmitted through the R 2 surface once, a further degree of freedom in design is provided. Due to this, parallax can be minimized.
  • the reflection mirror can be configured to become an afocal system. The configuration applies to radius curvature of first and third surfaces by using Equation 1 below.
  • d denotes a distance between centers (center thickness) of first and third surfaces of a doublet
  • R 1 denotes radius curvature of the first surface
  • R 3 denotes radius curvature of the third surface
  • n denotes a refractive index of the material
  • D 1 denotes a refractive power of the first surface and D 2 denotes a refractive power of the third surface.
  • FIG. 18 is a schematic view illustrating a structure of a reflection mirror, according to another embodiment of the present invention.
  • a second surface is an aspheric surface having a conic coefficient
  • the parallax is further minimized. In this case, parallax was reduced by 90% or greater, compared to that of the reflection mirror of FIG. 17 .
  • FIGS. 19, 20 and 21 respectively show Tangential ray aberration degrees in the case of a conventional single reflection surface, in the case of a doublet reflection surface (when the reflection surface between two lenses is spherical), and in the case of a doublet reflection surface where a conic aspheric surface is adopted as the reflection surface between two lenses.
  • Each lens has an inclination angle of ⁇ 2.0°.
  • FIG. 19 is a graph representing spherical aberration, and when it coincides with an X axis, parallax does not occur.
  • a maximum aberration value of the conventional single reflection surface is 0.02 mm
  • a maximum aberration value when the spherical reflection surface is adopted as a median surface of the doublet is 0.004 mm
  • a maximum aberration value when the conic aspheric reflection surface is adopted as a median surface of the doublet is 0.0004 mm.
  • the spherical reflection surface employed as the median surface of the doublet has an improvement in terms of the integral value of spherical aberration amount (y axis) with respect to x axis (an effective space that LED light beam reflects by a minimum of 80% or greater, compared with the conventional single reflection surface.
  • the conic aspheric reflection surface employed as the median surface of the doublet has an improvement in terms of the integral value of by a minimum of 90% or greater, compared with the spherical reflection surface employed as the median surface of the doublet.
  • a dot sighting device with large caliber for a heavy machine gun in which binocular vision is possible can be obtained.
  • a target can be rapidly sighted taking into consideration distance amendment, and thus firing can be performed taking into consideration differences according to a distance of the target.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Telescopes (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
US15/879,426 2007-07-06 2008-07-03 Dot sighting device with large caliber Active USRE47256E1 (en)

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KR1020070067861A KR100906159B1 (ko) 2007-07-06 2007-07-06 대구경 도트 사이트 장치
KR10-2007-0067861 2007-07-06
PCT/KR2008/003944 WO2009008629A1 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber
US12/667,576 US8087196B2 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber
US15/879,426 USRE47256E1 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber
US201313755913A 2013-01-31 2013-01-31

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US16/195,477 Active USRE48545E1 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber
US15/879,426 Active USRE47256E1 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber
US16/195,378 Active USRE48746E1 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber
US15/598,007 Active USRE47133E1 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber
US12/667,576 Ceased US8087196B2 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber
US17/222,333 Active USRE49977E1 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber
US13/755,913 Active USRE46764E1 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber

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US12/667,576 Ceased US8087196B2 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber
US17/222,333 Active USRE49977E1 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber
US13/755,913 Active USRE46764E1 (en) 2007-07-06 2008-07-03 Dot sighting device with large caliber

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JP (5) JP5406834B2 (zh)
KR (1) KR100906159B1 (zh)
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JP2018159546A (ja) 2018-10-11
JP2015017797A (ja) 2015-01-29
USRE48545E1 (en) 2021-05-04
KR20090003999A (ko) 2009-01-12
US8087196B2 (en) 2012-01-03
KR100906159B1 (ko) 2009-07-03
USRE49977E1 (en) 2024-05-21
USRE48746E1 (en) 2021-09-21
USRE46487E1 (en) 2017-07-25
EP2733454B1 (en) 2018-09-05
CN101730831B (zh) 2013-04-17
JP5406834B2 (ja) 2014-02-05
ES2672007T3 (es) 2018-06-12
TR201807503T4 (tr) 2018-06-21
USRE47133E1 (en) 2018-11-20
USRE46764E1 (en) 2018-03-27
EP2165149A4 (en) 2013-03-13
JP6567742B2 (ja) 2019-08-28
CN101730831A (zh) 2010-06-09
EP2165149A1 (en) 2010-03-24
ES2689113T3 (es) 2018-11-08
JP2013178086A (ja) 2013-09-09
WO2009008629A1 (en) 2009-01-15
JP2010532861A (ja) 2010-10-14
US20100275495A1 (en) 2010-11-04
JP6371345B2 (ja) 2018-08-08
JP2016223769A (ja) 2016-12-28
EP2165149B1 (en) 2018-05-02
JP5695696B2 (ja) 2015-04-08

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