Abstract
In this paper, a method is proposed to create a pair of
one dimensional binary phase modulator matrices 1D-BPMs, which is mathematically
equivalent to a single two-dimensional binary phase modulator matrix 2D-BPM
based on Sylvester constructed Hadamard matrices. An advantage of 1D-BPM over
2D-BPM is that the number of drive electrodes can be reduced from $N^{2}$ to $2N$ for a $N\times N$ Hadamard
phase matrix, thus simplifying the drive interconnects and drive electronics.
1D-BPM can be based on electro-optical material and hence can be driven electrically,
which is an advantage over the 2D-BPM which is usually etched on a glass substrate
and actuated mechanically to implement the speckle reduction in laser projectors.
We have discussed the algorithm for constructing the pair of dynamic 1D-BPMs
to replace the 2D-BPM. Preliminary experiments are performed to demonstrate
the validity of our concept.
© 2012 IEEE
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