1:30 PM - 3:30 PM
▲ [20p-P6-2] Performance analysis of optical frequency comb profilometry with a single pixel camera based on ghost imaging
Keywords:Mode-locked lasers,Three-dimensional image acquisition,Computational imaging
Optical frequency comb is very useful for obtaining the profile of a large-scale object with very high accuracy. Ghost imaging is new technique that can be used for observing intensity-only or complex amplitude of an object by using a single-pixel camera. The image of an object can be reconstructed by correlating pre-computed field mask pattern with the intensities measured at the output of single-pixel camera. However, the acquisition of amplitude and phase information of an object with depth remains a challenge.
In this research, we introduced a new system using the optical frequency comb laser with a single-pixel camera based on the ghost imaging technique for measuring the profile of the object. The optical frequency comb laser was employed to precisely record the relative phase of the object whilst the ghost-imaging technique was applied to reconstruct the object's profile. Ghost imaging technique performed in this research composed of single-pixel camera that was constructed with a fast photo-receiver and two digital micro-mirror devices (DMDs).
We studied the effect of different types of mask on parameter such as number of measurement, number of object pixel, profile depth and time taken for reconstruction. In the optical setup, one of DMDs displays the mask pattern that will modulate the wave reflected from the object. We found that the image quality benefits and root-mean-square (RMSE) error of original and reconstructed object varies according to the masks used. The numbers of object pixel also affect the time taken for reconstruction.
The simulation and experimental results are now further research to describe the performance of the proposed method with different type of masks. The details about the method and the comparison between the use of the random and Hadamard masks will be carefully discussed in our presentation.
In this research, we introduced a new system using the optical frequency comb laser with a single-pixel camera based on the ghost imaging technique for measuring the profile of the object. The optical frequency comb laser was employed to precisely record the relative phase of the object whilst the ghost-imaging technique was applied to reconstruct the object's profile. Ghost imaging technique performed in this research composed of single-pixel camera that was constructed with a fast photo-receiver and two digital micro-mirror devices (DMDs).
We studied the effect of different types of mask on parameter such as number of measurement, number of object pixel, profile depth and time taken for reconstruction. In the optical setup, one of DMDs displays the mask pattern that will modulate the wave reflected from the object. We found that the image quality benefits and root-mean-square (RMSE) error of original and reconstructed object varies according to the masks used. The numbers of object pixel also affect the time taken for reconstruction.
The simulation and experimental results are now further research to describe the performance of the proposed method with different type of masks. The details about the method and the comparison between the use of the random and Hadamard masks will be carefully discussed in our presentation.