Optical sight with rangefinder and assembly method for the same

Abstract

The present invention provides an optical sight with rangefinder and assembly method thereof. The optical sight comprises an erector lens unit, a photoelectric rangefinding unit, a barrel, an objective lens unit, a plurality of adjusting elements, a power supply unit and an eyepiece lens unit disposed on the barrel. The photoelectric rangefinding unit includes a laser emitter, a laser receiver and a range indicator. A plurality of openings are formed on sidewall of the barrel corresponding to the positions of the laser emitter, laser receiver and range indicator for conducting the cavity to outside the barrel. The assembly method comprises the steps of: assembling the erector lens unit, the photoelectric rangefinding unit and the barrel together, then connecting an objective lens unit and mounting a plurality of adjusting elements, adjusting the objective lens unit and mounting the adjusting elements and the power supply unit, adjusting the focus of the laser emitter and the laser receiver and adjusting the position of the range indicator through the openings formed on the barrel for complying with the requirement of photoelectric rangefinding performance. The assembly method of the optical sight according to the present invention can be adjusted after all elements are assembled. The assembly method of the optical sight according to the present invention can be used to reduce the adjusting times and prevent unnecessary disassemblies and re-assemblies for simplifying the assembly process and improving the yield rate and the productibility of the optical sight.

1 . An optical sight with rangefinder, which comprises: 
 a barrel defined with a cavity extended through therein axially;    a photoelectric rangefinding unit disposed in the cavity of the barrel, having a laser emitter, a laser receiver and a range indicator, and defined with a tunnel;    an erector lens unit disposed in the tunnel of the photoelectric rangefinding unit, having a reference mark for aiming;    an objective lens unit disposed on one end of the barrel;    an eyepiece lens unit disposed on the other end of the barrel;    an adjusting element disposed on the outside surface of the barrel and extended into the barrel partially, corresponding to at least one of the objective lens unit, the photoelectric rangefinding unit and the erector lens unit thereby adjusting the relative positions of the objective lens unit, the photoelectric rangefinding unit and/or the erector lens unit; and    a power supply unit disposed on the barrel, providing an electrical power to generate the rangefinding function;    wherein the sidewall of the barrel is formed with a plurality of openings corresponding to the positions of the laser emitter, laser receiver and/or range indicator of the photoelectric rangefinding unit.    
     
     
         2 . The optical sight with rangefinder as claimed in  claim 1  wherein the photoelectric rangefinding unit comprises a reflecting prism collocating with the laser emitter, the laser receiver and the range indicator.  
     
     
         3 . The optical sight with rangefinder as claimed in  claim 2  wherein the reflecting prism includes a reflecting surface for reflecting a light with a predetermined wavelength and allowing other light with other wavelengths to pass.  
     
     
         4 . The optical sight with rangefinder as claimed in  claim 1  further comprising a reticle as the reference mark for aiming.  
     
     
         5 . The optical sight with rangefinder as claimed in  claim 4  wherein the reticle is positioned at one of the image plane of the objective lens unit and the image plane of the erector lens unit.  
     
     
         6 . The optical sight with rangefinder as claimed in  claim 5  wherein the emitting beam of the laser emitter is aligned with the center of the reticle.  
     
     
         7 . The optical sight with rangefinder as claimed in  claim 6  wherein the receiving beam of the laser receiver is aligned with the center of the reticle.  
     
     
         8 . The optical sight with rangefinder as claimed in  claim 1  wherein the range indicator projects an image on the image plane of the objective lens unit or the image plane of the erector lens unit.  
     
     
         9 . The optical sight with rangefinder as claimed in  claim 1  wherein the barrel comprises a plurality of sealing sheets utilized to seal the openings of the barrel after assembly and adjustment of the optical sight.  
     
     
         10 . The optical sight with rangefinder as claimed in  claim 1  further comprising an optical filter positioned in front of the objective lens unit.  
     
     
         11 . A method for assembling an optical sight with rangefinder, comprising the steps of: 
 assembling an erector lens unit, a photoelectric rangefinding unit, a barrel formed with a plurality of openings, an objective lens unit, and an adjusting element into a first assembly;    adjusting the objective lens unit and the erector lens unit of the first assembly to meet the requirements of the parallax and the point of impact performances;    adjusting any one of a laser emitter, a laser receiver and a range indicator of the photoelectric rangefinding unit to meet the requirement of the photoelectric rangefinding performance;    assembling an eyepiece lens unit to an end of the barrel; and    sealing the openings of the barrel thereby completing assembly of the optical sight with rangefinder.    
     
     
         12 . The method for assembling an optical sight with rangefinder as claimed in  claim 11 , further comprising a step of adjusting the position of a reticle to reach the image plane of the objective lens unit or the image plane of erector lens unit and then fixing the reticle.  
     
     
         13 . The method for assembling an optical sight with rangefinder as claimed in  claim 12  wherein the requirement of the parallax performance is that there is no parallax at 100 yards, and the requirement of the point of impact performance is that the point of impact is lower than 1 MOA (minute of angle).  
     
     
         14 . The method for assembling an optical sight with rangefinder as claimed in  claim 12  wherein the adjustment of the laser emitter is implemented through a first opening of the barrel, to align the emitting beam of the laser emitter with the center of the reticle.  
     
     
         15 . The method for assembling an optical sight with rangefinder as claimed in  claim 12  wherein the adjustment of the laser receiver is implemented through a second opening of the barrel, to align the receiving beam of the laser receiver with the center of the reticle.  
     
     
         16 . The method for assembling an optical sight with rangefinder as claimed in  claim 11  wherein the adjustment of the range indicator is implemented through a third opening of the barrel, to adjust the position of the characters displayed by the range indicator.  
     
     
         17 . The method for assembling an optical sight with rangefinder as claimed in  claim 12 , further comprising a step of mounting a power supply assembly on the barrel.  
     
     
         18 . The method for assembling an optical sight with rangefinder as claimed in  claim 17 , further comprising a quality test procedure before assembling the optical sight, including an optical performance test, a photoelectric rangefinding performance test, an impact strength test and an air-sealing performance test.  
     
     
         19 . The method for assembling an optical sight with rangefinder as claimed in  claim 17 , further comprising a step of assembling an optical filter to cover the objective lens unit.  
     
     
         20 . An optical sight with rangefinder, comprising a barrel, a photoelectric rangefinding unit, an objective lens unit, an eyepiece lens unit and an adjusting elements wherein the barrel is a hollow barrel provided with a cavity extended through therein axially, the photoelectric rangefinding unit is assembled into the cavity of the barrel, a plurality of openings are formed on the sidewall of the barrel for adjusting the photoelectric rangefinding unit without disassembling the optical sight.  
     
     
         21 . The optical sight with rangefinder as claimed in  claim 20  wherein the barrel further comprises a plurality of sealing sheets utilized to seal the openings of the barrel after assembly and adjustment of the optical sight.