Patent ID: 8384906
Filing Date: 2013-02-26
Classification: G01B

Abstract:
1. A real time range adjustable real-time autocorrelator comprising: an input configured to receive an incident light beam, a beam splitter configured to split the incident light beam to a controlled light beam and a reference light beam, a motor, one set of parallel mirrors which is mounted on the motor, wherein the delay line rotates constantly and continuously by the motor such that the rotating axis has a small angle δ to the light that is incident thereon, a rotation stage configured to change scan range of the autocorrelator, a flat minor configured to receive the light beam from the set of parallel mirrors and to reflect back the light beam to the set of parallel minors, a roof mirror configured to receive the reference light beam from the beam splitter and to reflect the reference light beam back and laterally shifts the reference light beam a certain distance, a curved minor configured to focus the controlled light beam from the delay line and the reference light beam from the roof minor on the same spot of a nonlinear crystal which generates an intensity correlation between two pulses of light incident thereon to provide a correlation signal, a detector configured to monitor the intensity correlation signal, and a photo interrupter configured to monitor which monitors the speed of motor and to generate a synchronizing signal.