Individual identification apparatus

摘要

In an individual identification apparatus, a hologram (11) recorded on a card is irradiated with laser light to read out a finger print image of a specific person. A finger of an arbitrary person to be identified with the specific person is irradiated with laser light to obtain a finger print image. Thus obtained finger print images are jointly written in a first spatial light modulator (SLM2). Then, the joint image is read out and Fourier transformed by lens (5) to obtain a Joint Fourier Transform image, which is then written in a second spatial light modulator (SLM2'). The Joint Fourier Transform image is then read out and Fourier transformed by lens (6) to obtain a pair of output correlation peaks. A photodetector (7) detects the intensity of the output correlation peaks and outputs a signal indicative of the intensity. A threshold processor (61) compares the value of the signal with a pre-determined threshold value to positively or negatively identify the arbitrary person with the specific person.