Abstract: Disclosed is an optical artificial neural network system which includes a first spatial light modulator modulating an incident light to generate a first light having a first optical image, a concave mirror reflecting the first light to generate a second light having a second optical image, a first polarized beam splitter disposed between the first spatial light modulator and the concave mirror, a first quarter wave-plate disposed between the first spatial light modulator and the first polarized beam splitter, a second spatial light modulator generating a third light by modulating the second light reflected by the first polarized beam splitter so as to have a third optical image, a beam splitter disposed between the first spatial light modulator and the first polarized beam splitter, and an imaging device.

Abstract: Disclosed is an optical artificial neural network system which includes an optical hidden layer that receives an input light including input data and generates an output light by performing a linear process and a nonlinear process on the input data, and a light transfer unit that provides the output light to an input of the optical hidden layer, and the optical hidden layer performs the linear process and the nonlinear process based on the received output light.

Abstract: Disclosed is an optical system which includes a first lens that receives input data from an object, a kernel that performs a first Fourier transform on the input data and generates learning data by performing calculation on a result of the first Fourier transform and pattern data, and a second lens that generates result data by performing a second Fourier transform on the learning data, and the input data, the learning data, and the result data include both a positive number and a negative number.