Pulse Modulated Laser Sight for Firearms

Abstract

A laser sighting device for a semi-automatic handgun having a recoil spring guide chamber housing a recoil spring surrounding a spring guide. The laser sighting device includes a pulse modulated laser received within the spring guide, having an input and a light output for emitting a pulse modulated laser light aligned with a path of a bullet fired by the handgun; and a sensor for detecting firing of the handgun, having an output coupled to the input of the pulse modulated laser. When the sensor detects the handgun has been fired, the output of the sensor triggers the pulse modulated laser to emit a train of pulses of laser light.

1 . A laser sighting device for a semi-automatic handgun having a recoil spring guide chamber housing a recoil spring surrounding a spring guide, the laser sighting device comprising:
 a pulse modulated laser received within the spring guide, having an input and a light output for emitting a pulse modulated laser light aligned with a path of a bullet fired by the handgun; and   a sensor for detecting firing of the handgun, having an output coupled to the input of the pulse modulated laser;   such that when the sensor detects the handgun has been fired, the output of the sensor triggers the pulse modulated laser to emit a train of pulses of laser light.   
     
     
         2 . The laser sighting device of  claim 1  wherein the pulse modulated mode laser is selected from the group consisting of single mode laser and a dual mode laser. 
     
     
         3 . The laser sighting device of  claim 1 , wherein when the sensor detects the handgun has been fired the laser light emitted from the pulse modulated laser is modulated from a constant light to a brighter light intensity. 
     
     
         4 . The laser sighting device of  claim 3 , wherein the constant light is zero light intensity. 
     
     
         5 . The laser sighting device of  claim 1  wherein the pulse modulated laser comprises:
 a driver board received by the spring guide coupled to a battery; 
 a sensor coupled to the driver board; 
 one or more laser diodes coupled to the driver board; 
 a lens housing adjustable by at least one adjustment screw to align the pulse modulated laser; and 
 a collimating lens received by the lens housing and coupled to the one or more laser diodes. 
 
     
     
         6 . The laser sighting device of  claim 1  wherein the sensor is selected from the group consisting of a piezoelectric vibration sensor, a MEMS (micro electro mechanical system) accelerometer, a Hall effect magnetic sensor, a Reed effect magnetic sensor, a capacitive sensor, a carbon microphone, an acoustical sensor and an optical sensor. 
     
     
         7 . The laser sighting device of  claim 1  wherein the pulse modulated mode laser emits a laser pulse with a light wavelength that is selected from the group consisting of visible, ultraviolet, near infrared and far infrared wavelengths. 
     
     
         8 . The laser sighting device of  claim 1  wherein a duration of a pulse from the pulse modulated mode laser is between approximately 100 nanoseconds and approximately 200 microseconds. 
     
     
         9 . The laser sighting device of  claim 1 , wherein the pulse emitted from the pulse modulated mode laser is a pulse train comprising multiple independent individual laser pulses. 
     
     
         10 . The laser sighting device of  claim 9 , wherein each pulse train varies in duration from approximately 100 milliseconds to approximately 200 milliseconds. 
     
     
         11 . The laser sighting device of  claim 1 , wherein the sensor further detects a temporary disconnection between a battery within the spring guide and a contact pin of a posterior cap at an end of the spring guide.