Encoded signal detection and display

Abstract

A method of controlling a target marking system includes emitting a beam with a beam source associated with a target marker. The method also includes sensing movement of the target marker, and modifying operation of the beam source based on the sensed movement. Such modification changes a characteristic of the emitted beam.

What is claimed is: 
     
         1 . A method of controlling a target marking system, comprising:
 emitting a beam with a beam source associated with a target marker;   sensing movement of the target marker; and   modifying operation of the beam source based on the sensed movement, wherein such modification changes a characteristic of the emitted beam.   
     
     
         2 . The method of  claim 1 , wherein sensing movement of the target marker comprises sensing a linear movement including at least one of a horizontal component and a vertical component. 
     
     
         3 . The method of  claim 1 , wherein the emitted beam is collinear with a first axis in a plane comprising the first axis and a second axis orthogonal to the first axis, and wherein a first component of the sensed movement is defined along the second axis. 
     
     
         4 . The method of  claim 3 , wherein a second component of the sensed movement is defined along a third axis orthogonal to the plane. 
     
     
         5 . The method of  claim 1 , wherein the emitted beam is collinear with a first axis in a plane comprising the first axis and a second axis orthogonal to the first axis, and wherein sensing movement of the target marker comprises sensing an angular movement about an axis orthogonal to the emitted beam. 
     
     
         6 . The method of  claim 5 , wherein sensing the angular movement comprises sensing rotation about a third axis orthogonal to the plane. 
     
     
         7 . The method of  claim 5 , wherein sensing the angular movement comprises sensing rotation about the second axis. 
     
     
         8 . The method of  claim 1 , wherein modifying the operation of the beam source comprises increasing a pulse rate of the emitted beam. 
     
     
         9 . The method of  claim 8 , further comprising increasing the pulse rate based on an angular velocity of the target marker. 
     
     
         10 . The method of  claim 8 , wherein the increased pulse rate is between approximately 1 Hz and approximately 30 Hz. 
     
     
         11 . The method of  claim 8 , wherein the increased pulse rate is between approximately 1 Hz and approximately 10 Hz. 
     
     
         12 . The method of  claim 1 , wherein modifying the operation of the beam source comprises increasing a duty cycle of the beam source while keeping a pulse width of the emitted beam constant. 
     
     
         13 . The method of  claim 1 , further comprising modifying at least one of a pulse signature and a wavelength of the emitted beam independent of the sensed movement. 
     
     
         14 . A method of controlling a target marking system, comprising
 emitting a beam with a beam source associated with a target marker;   sensing angular movement of the target marker; and   increasing a pulse rate of the emitted beam in response to the sensed movement.   
     
     
         15 . The method of  claim 14 , wherein sensing the angular movement comprises sensing an angular velocity of the target marker. 
     
     
         16 . The method of  claim 15 , wherein the pulse rate is increased based on the sensed angular velocity. 
     
     
         17 . The method of  claim 14 , further comprising sensing a decrease in the angular velocity and decreasing the pulse rate of the emitted beam in response to the sensed decrease. 
     
     
         18 . A target marking system, comprising:
 a target marker, the target marker comprising
 a beam source configured to emit a beam, 
 a motion sensor configured to sense movement of the target marker and to generate a signal indicative of the sensed movement, and 
 a controller in communication with the beam source and the motion sensor, the controller configured to modify operation of the beam source in response to the signal generated by the motion sensor, wherein such modification changes a characteristic of the emitted beam. 
   
     
     
         19 . The target marking system of  claim 18 , wherein the motion sensor comprises at least one of a gyroscope and an accelerometer. 
     
     
         20 . The target marking system of  claim 18 , wherein the motion sensor comprises a two-axis gyroscope configured to sense angular movement of the target marker. 
     
     
         21 . The target marking system of  claim 20 , wherein the signal comprises an output voltage of the gyroscope proportional to an angular velocity of the target marker. 
     
     
         22 . The target marking system of  claim 18 , further comprising a collimating lens positioned in a path of the emitted beam and optically downstream of the beam source. 
     
     
         23 . The target marking system of  claim 18 , further comprising a cooler disposed in thermal contact with the beam source, wherein the cooler is configured to reduce a temperature of the beam source while the beam is emitted. 
     
     
         24 . The target marking system of  claim 18 , wherein the beam source comprises a quantum cascade laser. 
     
     
         25 . The target marking system of  claim 24 , further comprising an additional beam source operably connected to the controller, the additional beam source configured to operate independent of the signal generated by the motion sensor. 
     
     
         26 . The target marking system of  claim 18 , wherein the motion sensor comprises an image processor configured to determine movement of a field of view. 
     
     
         27 . The target marking system of  claim 26 , further comprising an imager, wherein the field of view is a field of view of a component of the imager. 
     
     
         28 . A target marking system, comprising:
 a target marker configured to be coupled to a firearm, the target marker comprising
 a beam source configured to emit a beam, 
 a motion sensor configured to sense movement of the firearm and to generate a signal indicative of the sensed movement, and 
 a controller in communication with the beam source and the motion sensor, the controller configured to modify operation of the beam source in response to the signal generated by the motion sensor, wherein such modification changes a characteristic of the emitted beam.