| Автор | R Ferriere |
| Автор | C Illueca |
| Автор | J P Goedgebuer |
| Дата выпуска | 1986-05-01 |
| dc.description | A 2D achromatic correlator working in polychromatic light or with broadband illumination is demonstrated. It consists of two achromatic Fourier transformers combining zone plates set in cascade in order to cancel out chromatic blurring effects introduced by the use of several wavelengths. Each of the spectral bands resolved in the source spectrum by the zone plates works as an independent channel. At the output of the set-up, the achromatic correlation peak results from the intensity superposition of monochromatic correlation peaks generated by each wavelength. The redundancy thus obtained yields a significant increase in the SNR, compared with that obtained when a single wavelength is used. Experimental results indicate that the SNR is increased by 3 dB and 8 dB as 5 channels (Ar<sup>+</sup> multiwavelength laser) and 40 channels (Xe arc lamp) are used, respectively. Practically, in pattern recognition, such a multichannel processor permits false alarms to be reduced; its discrimination capability is evaluated to be 1.25 greater than when using a monochromatic correlator. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | 2D achromatic correlation in polychromatic light |
| Тип | paper |
| DOI | 10.1088/0150-536X/17/3/006 |
| Print ISSN | 0150-536X |
| Журнал | Journal of Optics |
| Том | 17 |
| Первая страница | 153 |
| Последняя страница | 159 |
| Аффилиация | R Ferriere; Lab. d'Optique P.M. Duffieux, CNRS, Besancon, France |
| Аффилиация | C Illueca; Lab. d'Optique P.M. Duffieux, CNRS, Besancon, France |
| Аффилиация | J P Goedgebuer; Lab. d'Optique P.M. Duffieux, CNRS, Besancon, France |
| Выпуск | 3 |
