WO2015080774A1 - System and method for removing and reinstalling weapon sight without changing boresight - Google Patents

System and method for removing and reinstalling weapon sight without changing boresight Download PDF

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Publication number
WO2015080774A1
WO2015080774A1 PCT/US2014/050984 US2014050984W WO2015080774A1 WO 2015080774 A1 WO2015080774 A1 WO 2015080774A1 US 2014050984 W US2014050984 W US 2014050984W WO 2015080774 A1 WO2015080774 A1 WO 2015080774A1
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WO
WIPO (PCT)
Prior art keywords
sight
weapon
boresight
attitude
rail
Prior art date
Application number
PCT/US2014/050984
Other languages
French (fr)
Inventor
Michael J. Choiniere
Original Assignee
Bae Systems Information And Electronic Systems Integration Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bae Systems Information And Electronic Systems Integration Inc. filed Critical Bae Systems Information And Electronic Systems Integration Inc.
Priority to US14/761,965 priority Critical patent/US20150316351A1/en
Publication of WO2015080774A1 publication Critical patent/WO2015080774A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G1/00—Sighting devices
    • F41G1/54—Devices for testing or checking ; Tools for adjustment of sights
    • F41G1/545—Tools for adjustment of sights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G3/00—Aiming or laying means
    • F41G3/32—Devices for testing or checking
    • F41G3/323—Devices for testing or checking for checking the angle between the muzzle axis of the gun and a reference axis, e.g. the axis of the associated sighting device

Definitions

  • the present disclosure relates generally to a weapon sights.
  • Embodiments of the disclosure are related to systems and methods for removing and reinstalling weapon sights without changing boresight of a weapon,
  • soldiers are required to rapidly acquire, identify, and accurately fire on enemy targets.
  • Soldiers may use weapon- mounted sights with visible and Infrared light sources to assist in the aiming process during daytime and nighttime missions. These sights may be mounted on handheld weapons and other small arms and are used to provide better target observation, illumination, and marking.
  • Boresight Is the adjustments made to an optical firearm sight or iron sights, to align the firearm barrel and sights.
  • a holographic weapon sight or holographic diffraction sight is a non-magnifying gun sight that allows the user to look through a glass optical window and see a reticle image superimposed at a distance on the field of view.
  • the hologram of the reticle is built Into the window and Is illuminated by a laser diode, [00O53 Every time when the weapon sight is removed/Installed, the boresight should be changed accordingly to the aim point.
  • the weapon sights should be clipped on at a particular position, in front of the weapon to use the aim point of the weapon. This increases the cost and manufacturing tolerance. This makes the sight not exchangeable between weapons and needs boresight adjustment,
  • a need therefore, exists for an Improved way to retain boresight even when the weapon sight is removed and reinstalled.
  • one aim of the disclosed embodiments is to provide for a method for removing and reinstalling a sight of a weapon without changing a boresight of a weapon.
  • a reference optical device is installed on a rail of the weapon. The sight installed on the rail can be removed and reinstalled along the rail. The reference optical device is utilized for determining a change in attitude of the weapon sight with respect to the boresight.
  • one aim of the disclosed embodiments is to provide for a method for removing and reinstalling a sight of a weapon without changing a boresight in which the change in attitude of the sight from a first position on the rail to a second position on the rail is accounted.
  • one aim of the disclosed embodiments Is to provide for a method for automatic alignment of a sight of a weapon with the boresight without changing a boresight,
  • the method comprises installing a reference optical device on a rail of the weapon, installing the sight on the rail, allowing a light to reflect from a reference optical device and from an optical device In the sight, obtaining a resultant light reflected from the reference optical device and from the optical device in the sight, processing the resultant light, determining a change in attitude of the sight relative the boresight and adjusting the sight based on the change in attitude,
  • ft is, therefore, one aim of the disclosed embodiments is to provide for a method for automatic alignment of a sight of a weapon with the boresight without changing a boresight in which processing the resultant light comprises, adjusting the brightness of the resultant light, performing dual centrold operation, determining the azimuth and elevation offsets, and obtaining a change in attitude of the sight relative the boresight by subtracting the error obtained based on the offsets.
  • one aim of the disclosed embodiments is to provide for a method for automatic alignment of a sight of a weapon with the boresight without changing a boresight
  • the brightness of the resultant light is adjusted by increasing the brightness of the maximum pixels of resultant light to a first predetermined value and decreasing the brightness of ail the pixels that are below a second predetermined of a saturation point
  • one aim of the disclosed embodiments is to provide for a method for automatic alignment of a sight of a weapon with the boresight without changing a foresight in which, the reference rail is maintained in the rail irrespective of removal and reinstallation of the sight of the weapon.
  • one aim of the disclosed embodiments is to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight comprising a reference optical device installed on a rail of the weapon, the sight installed on the rail, an attitude determination unit for determining a chang in attitude of the sight with respect to the boresight and a compensation module for compensating the aim point of the weapon in the sight based on the change in attitude without changing the boresight.
  • one aim of the disclosed embodiments is to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight in which the attitude determination unit accounts the change in attitude of the sight from a first position on the rail to a second position on the rail,
  • one aim of the disclosed embodiments is to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight further comprising an automatic alignment unit for aligning the sight of the weapon with the boresight without changing a boresight,
  • one aim of the disclosed embodiments s to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight in which the automatic alignment unit is configured to allow a light to reflect from the reference optical device and from an optical device in the sight obtain a resultant light reflected from the reference optical device and from the optical device in the sight process the resultant light, determine a change in attitude of the sight relative the boresight and adjust the sight based on the change in attitude.
  • one aim of the disclosed embodiments is to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight in which, the resultant light is processed to adjust the brightness of the resultant light, perform dual centroid operation, determine the azimuth and elevation offsets and obtain a change in attitude of the sight relative the boresight by subtracting the error obtained based on the offsets.
  • one aim of the disclosed embodiments is to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight in which the brightness of the resultant fight is adjusted by increasing the brightness of the maximum pixels of resultant light to a first predetermined value and decreasing the brightness of ali the pixels that are below a second predetermined of a saturation point.
  • one aim of the disclosed embodiments is to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight in which the reference rail is maintained In the rail irrespective of removal and reinstallation of the sight of the weapon.
  • one aim of the disclosed embodiments is to provide for a system and method for removing and reinstalling a sight of a weapon without changing a boresight in which the sight can be removed from the weapon for transport and reinstall without loss of the aim point to the weapon.
  • one aim of the disclosed embodiments is to provide for a system and method for removing and reinstalling a sight of a weapon without changing a boresight in which the sight can be mounted anywhere on the weapon and no longer only in front of the Advanced Combat Optical Gunsight (ACOG), This reduces cost and manufacturing tolerance since it does not need to be a "clip-on" style weapon sight.
  • ACOG Advanced Combat Optical Gunsight
  • one aim of the disclosed embodiments is to provide for a system and method for removing and reinstalling a sight of a weapon without changing a boresight in which the reference optical is mounted at a position on the rail where the weapon sight is exactly aligned with the boresight.
  • FIG. 1 is an illustration of a schematic diagram of weapon sight installed on a rail with a reference mirror, in accordance with the disclosed embodiments;
  • FIG, 2 is an illustration of a side view of weapon sight installed on a weapon, in accordance with the disclosed embodiments
  • FIG, 3 is an illustration of a schematic diagram of an automatic alignment system showing a weapon sight aligned via a reference mirror, in accordance with the disclosed embodiments;
  • FIG. 5 is an iilustration of a schematic diagram of images obtained during boresight alignment process as depicted in FIG, 4, in accordance with the disclosed embodiments; and 0030
  • FIG. 6 is an illustration of a schematic diagram of images showing error visualization via differential measurement, in accordance with the disclosed embodiments.
  • the present invention allows the aim point of the weapon in the sight can be compensated accordingly based on the change in attitude of the sight without changing the boresight. This allows retaining the boresight even when the weapon sight is removed and reinstalled. Thus, weapon sight can be mounted anywhere on a weapon without the need to boresight the weapon.
  • a schematic diagram of a weapon sight 102 in accordance with the disclosed embodiments is disclosed.
  • the weapon sight 102 can be installed at any position on a rail 104 of a weapon with respect, to a reference optical device 106.
  • the reference optical device 106 is permanently installed on the rail 104 Irrespective of the weapon sight 102 installation.
  • a change in attitude of the weapon sight 102 with respect to the boresight of the weapon is determined and accordingly the aim point of the weapon sight 102 is changed without changing the boresight.
  • the optical reference may be at a fixed position at which the weapon sight is perfectly aligned with the boresight.
  • the weapon sight can he positioned at any position on the rail and by determining the change in the attitude of the weapon sight with respect to the optical reference so that the weapon sight is adjusted without changing the boresight.
  • the attitude data between the optical reference and the weapon is coded Into a reference module and sent to the weapon sight when installed.
  • the weapon sight 102 depicted in FIG. 1 is in installed state on a weapon 200.
  • the weapon sight 102 can be removed from the weapon 200 and reinstalled without changing the boresight.
  • the position of the weapon sight 1 2 on the rail 104 can be varied at any time and the asm point of the weapon sight 102 Is compensated accordingly. This avoids need for changing the boresight each time when the weapon sight 102 is reinstalled.
  • FIG, 3 is an illustration of a schematic diagram of an automatic alignment unit 300 showing a weapon sight 102 aligned via a reference optical device 10S for correcting the weapon sight 102 of the weapon 200 depicted In FIG. 2.
  • the LED source 306 emits LED light 311 towards the beam slitter cube 308.
  • a collimating optics 312 positioned between the beam spiller cube 308 and the LED source 306 focus the LED light 311 on to the beam splitter cube 308 and avoids diverging.
  • the LED light 311 from the single LED light source 306 is spitted into two beams 308 and 307 In the beam slitter cube 308.
  • the bearn slitter cube 308 is a part of the weapon sight 102.
  • the light 307 from the beam splitter cube 308 passes towards the reference optical device 108 where it gets reflected back and pass through the beam splitter cube 30$ and reach another collimating optics 310, Similarly a part of the light 309 spitted from the beam splitter cube 308 also reaches the collimating optics 310, The collimating optics 310 focuses the lights 300 and 307 from the beam splitter cube 308 onto an imaging device for example, camera 304. [0037] The resultant image 318 depicts the resultant lights 307 and 309 on the co!IImating optics 310.
  • the enlarged view of the resultant image 316 is depicted as image 314, From the image 314 It is ver apparent that there is a change in the attitude of weapon sight 102 and the reference optical device 106.
  • the change in the aim point of the weapon sight 102 with respect to boresight can be determined.
  • the weapon sight 102 can be changed based on the determined change in aim point of weapon sight 102 without changing the boresight,
  • the weapon sight allows for a simplified one step alignment
  • Azimuth and elevation offsets can be measured by calculating dx and dy distances from the "reference" spot for a differential measurement Alignment is insensitive over time to shifts due to shock, vibration and temperature so that differential measurement provides temperature and vibration hardening.
  • the camera 314 and its associated processing unit may be configured as a determination unit to determine a change in attitude of the sight with respect to the boresight.
  • a compensation unit is utilized for compensating the aim point of the weapon in the sight based on the change in attitude without changing the boresight.
  • the compensation unit is installed in the sight to vary weapon sight without varying the boresight when the weapon sight is reinstalled or removed, it should be noted that the determination and compensation units has one or more algorithms for performing its tasks.
  • FIG, 4 is an illustration of a flo chart 400 pertaining to a boresight alignment process, in accordance with the disclosed embodiments.
  • the weapon sight is set for factory calibrations.
  • the factory calibrations can include but not limited to placing the optical components inside the weapon sight, adjusting the optical components for precise results and finally checking its results.
  • he weapon sight detects whether it has been attached or reinstalled on the rail of the weapon as said at the block 404,
  • the sensing of weapon sight on the rail also includes positioning the weapon sight from one position of the rail to other position on the rail, removing the weapon sight, reinstalling the weapon sight, without limitation.
  • the LED source is enabled to obtain the image 314 depicted in FIG. 3.
  • the image 314 is brightness adjusted by adjusting the maximum brightness pixel to a first predetermined higher value say 70%. as illustrated at block 408.
  • the brightness of the image 314 that are of zero pixel are adjusted to a second predetermined lower value say 20%, as illustrated at block 416.
  • the visible area of the image is split into two fields.
  • the azimuth and elevation offsets are determined by performing the dual centroid operations as said at blocks 418 and 414.
  • the blocks 406, 408, 412, 418, 418 and 414 are togethe represented as automatic alignment process 410.
  • the azimuth and elevation offsets are subtracted from the original image and then transformed to the weapon sight as illustrated at blocks 422 and 420 respectively,
  • FIG. 6 is an illustration of a schematic diagram of images showing error visualization via differential measurement, in accordance with the disclosed embodiments.
  • Images 602 and 000 represents the azimuth error of the weapon sight at first rail position and second rail position having a 20 pixel difference at a small (delta) movement with respect to the first
  • images 604 and 698 represent the elevation error of the weapon sight at first rail position and second rail position having a 20 pixel difference at a small (delta) movement with respect to the first.
  • this invention allows for the removal of the sight from the weapon for transport and reinstall without loss of the aim point to the weapon.
  • the sight doesn't need to be "clip -on” to use the aim point of the Advanced Combat Optica! Gunsighi (ACOG).
  • the weapon sight can be mounted anywhere o the weapon and no longer only in front of the ACOG, this reduces cost and manufacturing tolerance, as It does not need to be a "clip-on" style weapon sight.
  • the sight could also be exchangeable between weapons without the need for a boresight. Attitude data between the optical reference and the weapon could be coded info the reference module and sent to the weapon sight when installed.

Abstract

A system and method for removing and reinstating a sight of a weapon without changing a boresight is disclosed. A reference optical device is installed on a rail of the weapon and then the sight is installed on the rail. An attitude determination unit determines a change in attitude of the sight with respect to the boresight. The aim point of the weapon in the sight is compensated accordingly based on the change in attitude without changing the boresight by utilizing a compensation module. This allows retaining the boresight even when the weapon sight is removed and reinstalled. Thus weapon sight can be mounted anywhere on a weapon without the need to boresight the weapon.

Description

SYST M ANP„
SIGHT WITHOUT CHANGING BORESIGHT
ROSS»REFERENGE TO RELATED APPLICATION
[0001] This Application claims rights under 35 USC §119(e) from U.S. Application Serial No. 61/909,624 filed 27 Nov 2013, the contents of which are incorporated herein by reference.
TECHNICAL FIELD f©002] The present disclosure relates generally to a weapon sights. Embodiments of the disclosure are related to systems and methods for removing and reinstalling weapon sights without changing boresight of a weapon,
BACKGROUND
|O0 3| in close quarter combat, soldiers are required to rapidly acquire, identify, and accurately fire on enemy targets. Soldiers may use weapon- mounted sights with visible and Infrared light sources to assist in the aiming process during daytime and nighttime missions. These sights may be mounted on handheld weapons and other small arms and are used to provide better target observation, illumination, and marking.
[0004] Boresight Is the adjustments made to an optical firearm sight or iron sights, to align the firearm barrel and sights. A device called a bore sighter or collimator s used to accomplish this. A holographic weapon sight or holographic diffraction sight is a non-magnifying gun sight that allows the user to look through a glass optical window and see a reticle image superimposed at a distance on the field of view. The hologram of the reticle is built Into the window and Is illuminated by a laser diode, [00O53 Every time when the weapon sight is removed/Installed, the boresight should be changed accordingly to the aim point. For example, when the sight is removed from the weapon for transport and it should he reinstalled without loss of the aim point to the weapon. For this reason, the weapon sights should be clipped on at a particular position, in front of the weapon to use the aim point of the weapon. This increases the cost and manufacturing tolerance. This makes the sight not exchangeable between weapons and needs boresight adjustment,
[0006] A need, therefore, exists for an Improved way to retain boresight even when the weapon sight is removed and reinstalled. There is also a need to a way to mount a sight anywhere on a weapon without the need to boresight the weapon.
SUMMARY
[0007] The following summary is provided to facilitate an understanding of some of the innovative features unique to the disclosed embodiment and is not intended to be a full description. A full appreciation of the various aspects of the embodiments disclosed herein can he gained by taking into consideration the entire specification, claims, drawings, and abstract as a whole.
[0008] It is, therefore, one aim of the disclosed embodiments is to provide for a method for removing and reinstalling a sight of a weapon without changing a boresight of a weapon. A reference optical device is installed on a rail of the weapon. The sight installed on the rail can be removed and reinstalled along the rail. The reference optical device is utilized for determining a change in attitude of the weapon sight with respect to the boresight. Then, the aim point of the weapon in the sight is compensated based on the change in attitude without changing the boresight [00091 it is, therefore, one aim of the disclosed embodiments is to provide for a method for removing and reinstalling a sight of a weapon without changing a boresight in which the change in attitude of the sight from a first position on the rail to a second position on the rail is accounted.
[001 ] It is, therefore, one aim of the disclosed embodiments Is to provide for a method for automatic alignment of a sight of a weapon with the boresight without changing a boresight, The method comprises installing a reference optical device on a rail of the weapon, installing the sight on the rail, allowing a light to reflect from a reference optical device and from an optical device In the sight, obtaining a resultant light reflected from the reference optical device and from the optical device in the sight, processing the resultant light, determining a change in attitude of the sight relative the boresight and adjusting the sight based on the change in attitude,
10011] ft is, therefore, one aim of the disclosed embodiments is to provide for a method for automatic alignment of a sight of a weapon with the boresight without changing a boresight in which processing the resultant light comprises, adjusting the brightness of the resultant light, performing dual centrold operation, determining the azimuth and elevation offsets, and obtaining a change in attitude of the sight relative the boresight by subtracting the error obtained based on the offsets.
[00123 ft is, therefore, one aim of the disclosed embodiments is to provide for a method for automatic alignment of a sight of a weapon with the boresight without changing a boresight In which the brightness of the resultant light is adjusted by increasing the brightness of the maximum pixels of resultant light to a first predetermined value and decreasing the brightness of ail the pixels that are below a second predetermined of a saturation point,
|O0131 It is, therefore, one aim of the disclosed embodiments is to provide for a method for automatic alignment of a sight of a weapon with the boresight without changing a foresight in which, the reference rail is maintained in the rail irrespective of removal and reinstallation of the sight of the weapon.
[0014] I is, therefore, one aim of the disclosed embodiments is to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight comprising a reference optical device installed on a rail of the weapon, the sight installed on the rail, an attitude determination unit for determining a chang in attitude of the sight with respect to the boresight and a compensation module for compensating the aim point of the weapon in the sight based on the change in attitude without changing the boresight.
[001 SJ it is, therefore, one aim of the disclosed embodiments is to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight in which the attitude determination unit accounts the change in attitude of the sight from a first position on the rail to a second position on the rail,
[0016] It is, therefore, one aim of the disclosed embodiments is to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight further comprising an automatic alignment unit for aligning the sight of the weapon with the boresight without changing a boresight,
[0017] it Is, therefore, one aim of the disclosed embodiments s to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight in which the automatic alignment unit is configured to allow a light to reflect from the reference optical device and from an optical device in the sight obtain a resultant light reflected from the reference optical device and from the optical device in the sight process the resultant light, determine a change in attitude of the sight relative the boresight and adjust the sight based on the change in attitude. [0018] It is, therefore, one aim of the disclosed embodiments is to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight in which, the resultant light is processed to adjust the brightness of the resultant light, perform dual centroid operation, determine the azimuth and elevation offsets and obtain a change in attitude of the sight relative the boresight by subtracting the error obtained based on the offsets.
1001 ] It is, therefore, one aim of the disclosed embodiments is to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight in which the brightness of the resultant fight is adjusted by increasing the brightness of the maximum pixels of resultant light to a first predetermined value and decreasing the brightness of ali the pixels that are below a second predetermined of a saturation point.
[00201 it is, therefore, one aim of the disclosed embodiments is to provide for a system for removing and reinstalling a sight of a weapon without changing a boresight in which the reference rail is maintained In the rail irrespective of removal and reinstallation of the sight of the weapon.
|0O211 It is, therefore, one aim of the disclosed embodiments is to provide for a system and method for removing and reinstalling a sight of a weapon without changing a boresight in which the sight can be removed from the weapon for transport and reinstall without loss of the aim point to the weapon.
|9022| It is, therefore, one aim of the disclosed embodiments is to provide for a system and method for removing and reinstalling a sight of a weapon without changing a boresight in which the sight can be mounted anywhere on the weapon and no longer only in front of the Advanced Combat Optical Gunsight (ACOG), This reduces cost and manufacturing tolerance since it does not need to be a "clip-on" style weapon sight. [0023] It is, therefore, one aim of the disclosed embodiments is to provide for a system and method for removing and reinstalling a sight of a weapon without changing a boresight in which the reference optical is mounted at a position on the rail where the weapon sight is exactly aligned with the boresight.
BRIEF DESCRIPTION OF THE DRAWINGS
[©0243 The summary above, as well as the following detailed description of illustrative embodiments, is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the present disclosure, exemplary constructions of the disclosure are shown in the drawings. However, the disclosure is not limited to specific methods and instrumentalities disclosed herein. Moreover, those in the art will understand that the drawings are not to scale. Wherever possible, like elements have been Indicated by identical numbers,
[0025J FIG. 1 is an illustration of a schematic diagram of weapon sight installed on a rail with a reference mirror, in accordance with the disclosed embodiments;
[0026] FIG, 2 is an illustration of a side view of weapon sight installed on a weapon, in accordance with the disclosed embodiments;
[0027] FIG, 3 is an illustration of a schematic diagram of an automatic alignment system showing a weapon sight aligned via a reference mirror, in accordance with the disclosed embodiments;
8 [00281 ^ s a^ illustration of a flow chart pertaining a boresight alignment process, in accordance with the disclosed embodiments;
[00291 IG, 5 is an iilustration of a schematic diagram of images obtained during boresight alignment process as depicted in FIG, 4, in accordance with the disclosed embodiments; and 0030| FIG. 6 is an illustration of a schematic diagram of images showing error visualization via differential measurement, in accordance with the disclosed embodiments.
DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS
[00311 The particular configurations discussed In the following description are non-limiting examples that can he varied and are cited merel to illustrate at least one embodiment and are not intended to limit the scope thereof.
|0 32J The present invention allows the aim point of the weapon in the sight can be compensated accordingly based on the change in attitude of the sight without changing the boresight. This allows retaining the boresight even when the weapon sight is removed and reinstalled. Thus, weapon sight can be mounted anywhere on a weapon without the need to boresight the weapon.
[0033] Referring to RG, 1, a schematic diagram of a weapon sight 102 in accordance with the disclosed embodiments is disclosed. The weapon sight 102 can be installed at any position on a rail 104 of a weapon with respect, to a reference optical device 106. The reference optical device 106 is permanently installed on the rail 104 Irrespective of the weapon sight 102 installation. A change in attitude of the weapon sight 102 with respect to the boresight of the weapon is determined and accordingly the aim point of the weapon sight 102 is changed without changing the boresight.
? [0034] it should be noted that the optical reference may be at a fixed position at which the weapon sight is perfectly aligned with the boresight. The weapon sight can he positioned at any position on the rail and by determining the change in the attitude of the weapon sight with respect to the optical reference so that the weapon sight is adjusted without changing the boresight. The attitude data between the optical reference and the weapon is coded Into a reference module and sent to the weapon sight when installed.
[003S] As shown in FIG. 2 the weapon sight 102 depicted in FIG. 1 is in installed state on a weapon 200. The weapon sight 102 can be removed from the weapon 200 and reinstalled without changing the boresight. The position of the weapon sight 1 2 on the rail 104 can be varied at any time and the asm point of the weapon sight 102 Is compensated accordingly. This avoids need for changing the boresight each time when the weapon sight 102 is reinstalled.
[00361 FIG, 3 is an illustration of a schematic diagram of an automatic alignment unit 300 showing a weapon sight 102 aligned via a reference optical device 10S for correcting the weapon sight 102 of the weapon 200 depicted In FIG. 2. The LED source 306 emits LED light 311 towards the beam slitter cube 308. A collimating optics 312 positioned between the beam spiller cube 308 and the LED source 306 focus the LED light 311 on to the beam splitter cube 308 and avoids diverging. The LED light 311 from the single LED light source 306 is spitted into two beams 308 and 307 In the beam slitter cube 308. The bearn slitter cube 308 is a part of the weapon sight 102. The light 307 from the beam splitter cube 308 passes towards the reference optical device 108 where it gets reflected back and pass through the beam splitter cube 30$ and reach another collimating optics 310, Similarly a part of the light 309 spitted from the beam splitter cube 308 also reaches the collimating optics 310, The collimating optics 310 focuses the lights 300 and 307 from the beam splitter cube 308 onto an imaging device for example, camera 304. [0037] The resultant image 318 depicts the resultant lights 307 and 309 on the co!IImating optics 310. The enlarged view of the resultant image 316 is depicted as image 314, From the image 314 It is ver apparent that there is a change in the attitude of weapon sight 102 and the reference optical device 106. By processing the Image 314, the change in the aim point of the weapon sight 102 with respect to boresight can be determined. The weapon sight 102 can be changed based on the determined change in aim point of weapon sight 102 without changing the boresight,
[0038] It should be noted that as shown in FIG. 2, it will be seen that the weapon sight allows for a simplified one step alignment Azimuth and elevation offsets can be measured by calculating dx and dy distances from the "reference" spot for a differential measurement Alignment is insensitive over time to shifts due to shock, vibration and temperature so that differential measurement provides temperature and vibration hardening.
10039] The camera 314 and its associated processing unit may be configured as a determination unit to determine a change in attitude of the sight with respect to the boresight. A compensation unit is utilized for compensating the aim point of the weapon in the sight based on the change in attitude without changing the boresight. The compensation unit is installed in the sight to vary weapon sight without varying the boresight when the weapon sight is reinstalled or removed, it should be noted that the determination and compensation units has one or more algorithms for performing its tasks.
[0040] FIG, 4 is an illustration of a flo chart 400 pertaining to a boresight alignment process, in accordance with the disclosed embodiments. As shown at the block 402, the weapon sight is set for factory calibrations. The factory calibrations can include but not limited to placing the optical components inside the weapon sight, adjusting the optical components for precise results and finally checking its results. he weapon sight detects whether it has been attached or reinstalled on the rail of the weapon as said at the block 404, The sensing of weapon sight on the rail also includes positioning the weapon sight from one position of the rail to other position on the rail, removing the weapon sight, reinstalling the weapon sight, without limitation.
|0041J After detecting the presence of the weapon sight on the rail, as said at block 406, the LED source is enabled to obtain the image 314 depicted in FIG. 3. The image 314 is brightness adjusted by adjusting the maximum brightness pixel to a first predetermined higher value say 70%. as illustrated at block 408. The brightness of the image 314 that are of zero pixel are adjusted to a second predetermined lower value say 20%, as illustrated at block 416. Then as said at block 412, the visible area of the image is split into two fields. The azimuth and elevation offsets are determined by performing the dual centroid operations as said at blocks 418 and 414. As shown in the FIG. 4, the blocks 406, 408, 412, 418, 418 and 414 are togethe represented as automatic alignment process 410. The azimuth and elevation offsets are subtracted from the original image and then transformed to the weapon sight as illustrated at blocks 422 and 420 respectively,
|0042| FIG. 5 is an illustration of a schematic diagram of images obtained during boresight alignment process as depicted in FIG. 4, in accordance with the disclosed embodiments. Image 502 represent the process of enabling the LED source as depicted at block 408 of FIG, 4. image 504 represents the process of adjusting the brightness of the image as depicted at block 408 of FIG, 4. Image 508 represents the process of adjusting the brightness of the image as depicted at block 416 of FIG, 4. Image 508 represents the process of splitting the visible area info two fields as depicted at block 412 of FIG, 4, [0043] It wiil be understood that a feature provided by the auto-alignment subsystem provides the ability to remove and reattach the weapon sight at wi. Auto-alignment will automatically determine attitude of the sight relative to the rail Corrections will be made digitally for the Laser Range Finder (LRF) and Aim Point The reference mirror remains on the weapon. The system is a small component lesser than 0.05 lbs and has a low profile, lesser than 0.3 in . There is no visible signature.
[00441 FIG. 6 is an illustration of a schematic diagram of images showing error visualization via differential measurement, in accordance with the disclosed embodiments. Images 602 and 000 represents the azimuth error of the weapon sight at first rail position and second rail position having a 20 pixel difference at a small (delta) movement with respect to the first, images 604 and 698 represent the elevation error of the weapon sight at first rail position and second rail position having a 20 pixel difference at a small (delta) movement with respect to the first.
[00453 Those skilled in the art will appreciate that this invention allows for the removal of the sight from the weapon for transport and reinstall without loss of the aim point to the weapon. The sight doesn't need to be "clip -on" to use the aim point of the Advanced Combat Optica! Gunsighi (ACOG). The weapon sight can be mounted anywhere o the weapon and no longer only in front of the ACOG, this reduces cost and manufacturing tolerance, as It does not need to be a "clip-on" style weapon sight. The sight could also be exchangeable between weapons without the need for a boresight. Attitude data between the optical reference and the weapon could be coded info the reference module and sent to the weapon sight when installed. This invention allows for a weapon sight which is highly modular, exchangeable and beresighted and the reference is programmed. [0O4SJ It will be appreciated that variations of the above disclosed and other features and functions, or alternatives thereof, ma be desirably combined into many other different systems or applications. Also, various presently- unforeseen or unanticipated alternatives, modifications, variations or improvements therein may be subsequently made by those skilled in the art which are also intended to be encompassed by the following claims.
[0047] Although embodiments of the current disclosure have been described comprehensively In considerable detail to cover the possible aspects, those skilled in the art would recognize that other versions of the disclosure are also possible.

Claims

1. A method for removing and reinstalling a sight of a weapon without changing a boresight comprising:
installing a reference optical device on a rail of the weapon;
installing the sight on the rail;
determining a change in attitude of the sight with respect to the boresight; and
compensating the aim point of the weapon in the sight based on the change in attitude without changing the boresight.
2. The method of claim 1 further comprising accounting a change in attitude of the sight from a first position on the rail to a second position on the rail.
3. The method of claim 1 further comprising configuring the optical reference device at a fixed position on the rail at which the weapon sight is perfectly aligned with th boresight, whereby the weapon sight can be positioned at any position on the rail and by determining the change in the attitude of the weapon sight wit respect to the optica! reference, so that the weapon sight is adjusted without changing the boresight,
4. The method of claim 3 wherein the attitude data between the optical reference and the weapon could be is coded into a referenc module and sent to the weapon sight when installed.
5. A method for automatic alignment of a sight of a weapon with a boresight without changing the boresight comprising;
installing a reference optical device on a rail of the weapon; Installing the sight on the rati;
allowing a light to reflect from the reference optical device and from an optica! device in the sight;
obtaining a resultant light reflected from the reference optical device and from the optical device in the sight;
processing the resultant light;
determining a change in attitude of the sight relative the boresight; and
automatically adjusting the sight based on the change in attitude, whereby alignment is insensitive over time to shifts due to shock, vibration and temperature so that differentia! measurement provides temperature and vibration hardening..
6. The method of claim 5, wherein the processing the resultant light comprising:
adjusting the brightness of the resultant light:
performing dual centroid operation;
determining the azimuth and elevation offsets;
obtaining a change in attitude of the sight relative the boresight by subtracting the error obtained based on the offsets,
7. The method of claim 8, wherein adjusting the brightness of the resultant light comprising:
increasing the brightness of the maximum pixels of the resultant light to a first predetermined value; and
decreasing the brightness of all the pixels that are below a second predetermined of a saturation point.
8. The method claim 5 further comprising configuring the reference optical device at a fixed position on the rail at which the weapon sight is perfectly aligned with the boresight.
9. The method of claim 5, wherein the reference optical device is maintained in the rail irrespective of removal and reinstallation of the sight of the weapon.
10. A system for removing and reinstalling a sight of a weapon without changing a boresight comprising:
a reference optical device installed on a rail of the weapon;
the sight installed on the rail;
an attitude determination unit for determining a change in attitude of the sight with respect to the boresight; and
a compensation module for compensating an aim point of the weapon in the sight based on the change In attitude without changing the boresight,
11. The system of claim 10 wherein the attitude determination unit accounts the change in altitude of the sight from a first position on the rail to a second position on the rail,
12. The system of claim 10 further comprising an automatic alignment unit for aligning the sight of the weapon with the boresight without changing a boresight.
13. The system of claim 12 wherein the automatic alignment unit is configured to;
allow a light to reflect from the reference optical device and from an optical device in the sight; obtain a resultant Tight reflected from the reference optical device and from the optical device in the sight;
process the resultant light;
determine a change in attitude of the sight relative the boresight; and
adjust the sight based on the change in attitude.
14, The system of claim 13 wherein the resultant light is processed to;
adjust the brightness of the resultant light;
perform dual centroid operation;
determine the azimuth and elevation offsets;
obtain a change in attitude of the sight relative the boresight by subtracting the error obtained based on the offsets.
15. The system of claim 14 wherein the brightness of the resultant light is adjusted by:
increasing the brightness of the maximum pixels of resultant light to a first predetermined value; and
decreasing the brightness of ail the pixels that are below a second predetermined of a saturation point,
16. The system of claim 14* wherein the reference optical device is maintained in the raii irrespective of removai and reinstallation of the sight of the weapon.
17, The system of claim 14, wherein the reference optical device is fixed at a position on the rail at which the weapon sight is perfectly aligned with the boresight.
PCT/US2014/050984 2013-11-27 2014-08-14 System and method for removing and reinstalling weapon sight without changing boresight WO2015080774A1 (en)

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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10488155B2 (en) * 2015-01-23 2019-11-26 Raytheon Company Method and apparatus for electro-mechanical super-elevation
US10113837B2 (en) 2015-11-03 2018-10-30 N2 Imaging Systems, LLC Non-contact optical connections for firearm accessories
US10753709B2 (en) 2018-05-17 2020-08-25 Sensors Unlimited, Inc. Tactical rails, tactical rail systems, and firearm assemblies having tactical rails
US10645348B2 (en) 2018-07-07 2020-05-05 Sensors Unlimited, Inc. Data communication between image sensors and image displays
US11079202B2 (en) 2018-07-07 2021-08-03 Sensors Unlimited, Inc. Boresighting peripherals to digital weapon sights
US10742913B2 (en) 2018-08-08 2020-08-11 N2 Imaging Systems, LLC Shutterless calibration
US10921578B2 (en) 2018-09-07 2021-02-16 Sensors Unlimited, Inc. Eyecups for optics
US11122698B2 (en) 2018-11-06 2021-09-14 N2 Imaging Systems, LLC Low stress electronic board retainers and assemblies
US10801813B2 (en) 2018-11-07 2020-10-13 N2 Imaging Systems, LLC Adjustable-power data rail on a digital weapon sight
US10796860B2 (en) 2018-12-12 2020-10-06 N2 Imaging Systems, LLC Hermetically sealed over-molded button assembly
US11143838B2 (en) 2019-01-08 2021-10-12 N2 Imaging Systems, LLC Optical element retainers
CN115890638A (en) * 2021-09-30 2023-04-04 台达电子工业股份有限公司 Automated robotic arm system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110179689A1 (en) * 2008-07-29 2011-07-28 Honeywell International, Inc Boresighting and pointing accuracy determination of gun systems
US20120126001A1 (en) * 2010-11-22 2012-05-24 Irvine Sensors Corporation Self-Calibrating Targeting Sight
US20120167439A1 (en) * 2010-06-23 2012-07-05 Michael Jock System, method and computer program product for aiming target
US20120182417A1 (en) * 2011-01-19 2012-07-19 General Dynamics Advanced Information Systems System and method for projecting registered imagery into a telescope
WO2012137195A1 (en) * 2011-04-03 2012-10-11 Ipu Industries Ltd Firearm gun-sight
WO2013114066A1 (en) * 2012-01-30 2013-08-08 Bae Systems Plc Improvements in or relating to image display systems

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2212291B (en) * 1980-08-14 1989-11-29 Marconi Co Ltd Sighting system
US4422758A (en) * 1981-07-24 1983-12-27 The United States Of America As Represented By The Secretary Of The Army Boresighting of airborne laser designation systems
US4434702A (en) * 1982-03-08 1984-03-06 The United States Of America As Represented By The Secretary Of The Army Telescoping periscope
IL77065A (en) * 1985-11-15 1991-12-15 Mepro Kibbutz Hagoshrim Sighting device
US5486913A (en) * 1993-11-10 1996-01-23 Plx, Inc. Boresight assembly
US5410815A (en) * 1994-04-29 1995-05-02 Cubic Defense Systems, Inc. Automatic player identification small arms laser alignment system
US5446535A (en) * 1994-05-09 1995-08-29 Williams; John H. Firearm non-firing sight alignment system
US7856750B2 (en) * 1997-12-08 2010-12-28 Horus Vision Llc Apparatus and method for calculating aiming point information
US6366349B1 (en) * 1998-05-18 2002-04-02 Lasermax, Inc. Apparatus for aligning optical elements in response to the display of a reflected reticle image and method of aligning
SE514050C2 (en) * 1999-03-10 2000-12-18 Saab Training Systems Ab A simulator created for simulation of firing and a method for firing a simulator mounted on a weapon
GB9920455D0 (en) * 1999-08-31 1999-11-03 Fire Point Uk Limited Magnetic lightweight collimator
US7069685B2 (en) * 2003-09-12 2006-07-04 Lasermax, Inc. Diffractive head up display for firearms
US20070009860A1 (en) * 2004-08-18 2007-01-11 Lockheed Martin Corporation Boresight device and method
US7225578B2 (en) * 2005-01-06 2007-06-05 Eotech Acquisition Corp. Aiming sight having fixed light emitting diode (LED) array and rotatable collimator
US8827707B2 (en) * 2005-08-01 2014-09-09 Cubic Corporation Two beam small arms transmitter
US9113061B1 (en) * 2009-08-21 2015-08-18 Nivisys, Llc System and method for zoom alignment of clip-on digital electro-optic sight
US20110114725A1 (en) * 2009-11-17 2011-05-19 Young Nicholas E Sight system with automatic aimpoint compensation
CN101975530B (en) * 2010-10-19 2013-06-12 李丹韵 Electronic sighting device and method for regulating and determining graduation thereof
US8621759B2 (en) * 2010-11-10 2014-01-07 Raytheon Canada Limited Method and system for attenuating a wavelength shifting source
US8449298B2 (en) * 2011-01-03 2013-05-28 Peter Reardon Optical alignment device for a weapon simulator using an optical simulation beam
US9157734B2 (en) * 2012-06-15 2015-10-13 Bae Systems Information And Electronic Systems Integration Inc. Optical automatic attitude measurement for lightweight portable optical systems
US20130333266A1 (en) * 2012-06-16 2013-12-19 Bradley H. Gose Augmented Sight and Sensing System
US8826583B2 (en) * 2012-06-27 2014-09-09 Trackingpoint, Inc. System for automatically aligning a rifle scope to a rifle
US9665065B2 (en) * 2012-09-06 2017-05-30 Raytheon Company Infrared laser holographic projector
US20140150326A1 (en) * 2012-11-30 2014-06-05 United States Of America, As Represented By The Secretary Of The Army Process to Optically Align Optical Systems on a Weapon
US20150077547A1 (en) * 2013-05-29 2015-03-19 Bae Systems Information And Electronic Systems Integration Inc. Attitude measurement between optical devices
US9335122B2 (en) * 2013-11-27 2016-05-10 Bae Systems Information And Electronic Systems Integration Inc. System and method of aligning an accessory aimpoint to an aimpoint of a device
KR102141049B1 (en) * 2013-12-13 2020-08-04 정보선 Dot sighting device having a beam splitter
US9243868B1 (en) * 2014-12-15 2016-01-26 The United States Of America, As Represented By The Secretary, Department Of Homeland Security Reticle providing maximized danger space

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110179689A1 (en) * 2008-07-29 2011-07-28 Honeywell International, Inc Boresighting and pointing accuracy determination of gun systems
US20120167439A1 (en) * 2010-06-23 2012-07-05 Michael Jock System, method and computer program product for aiming target
US20120126001A1 (en) * 2010-11-22 2012-05-24 Irvine Sensors Corporation Self-Calibrating Targeting Sight
US20120182417A1 (en) * 2011-01-19 2012-07-19 General Dynamics Advanced Information Systems System and method for projecting registered imagery into a telescope
WO2012137195A1 (en) * 2011-04-03 2012-10-11 Ipu Industries Ltd Firearm gun-sight
WO2013114066A1 (en) * 2012-01-30 2013-08-08 Bae Systems Plc Improvements in or relating to image display systems

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