초록 ▼

The improved electrooptic signal processing relies upon matrix-matrix multiplication using twos complement arithmetic. A source of pulse collimated light illuminates two two-dimension spatial light modulators that operate in a reflective mode through a polarizing beamsplitter. Each of the spatial li

The improved electrooptic signal processing relies upon matrix-matrix multiplication using twos complement arithmetic. A source of pulse collimated light illuminates two two-dimension spatial light modulators that operate in a reflective mode through a polarizing beamsplitter. Each of the spatial light modulators has a matrix of optically encoded information of numbers in the twos complement binary representation so that a mixed binary representation of signals is generated within the two-dimensioned photodetector array. The mixed binary representation signals are decoded to a twos complement binary representation or a decimal representation to be useful for more conventional processing techniques. The twos complement arithmetic when incorporated with the electrooptic architecture provides for a convenient means for handling bipolar numbers, avoids the need for matrix partitioning when the matrices are real and offers a means to improve accuracy over conventional optical analog techniques.

대표청구항 ▼

An apparatus for improving accuracy in an electrooptical matrix-matrix multiplier using twos complement arithmetic comprising: a source of pulsed collimated light; first means disposed to be illuminated by the pulsed collimated light source for providing a first matrix of optical encoded information

An apparatus for improving accuracy in an electrooptical matrix-matrix multiplier using twos complement arithmetic comprising: a source of pulsed collimated light; first means disposed to be illuminated by the pulsed collimated light source for providing a first matrix of optical encoded information of numbers in the twos complement binary representation; second means disposed to be illuminated by the pulsed collimated light source for providing a second matrix of optical encoded information of numbers in the twos complement binary representation, the first matrix providing means and the second matrix providing means are adapted to be mutually orthogonally displaced with respect to one another to optically align different encoded information of numbers of twos complement binary representations each time the light source is pulsed to enable the multiplication thereof, the first matrix providing means and the second matrix providing means each include a reflective surface behind a two-dimension spatial light modulator stacked to advance their encoded information of numbers of twos complement binary representations mutually orthogonal with respect to each other each time the light source is pulsed; a polarizing beam splitter located to receive pulsed collimated light from the source and orthogonally direct it to the first matrix providing means and to direct light reflected therefrom to the second matrix providing means that is orthogonally disposed with respect to the polarizing beamsplitter and to redirect light reflected from the second matrix providing means; means disposed in an aligned relationship with the polarizing beam splitter to receive the redirected light therefrom for adding successively multiplied encoded information of numbers in the twos complement binary representation of the first matrix providing means and the second matrix providing means to be expressed as mixed binary representation signals; and means coupled to receive the mixed binary representation signals for decoding to twos complement and decimal representations.