SYNTHESIZED DIFFRACTION ELEMENTS FOR DATA READING FROM OPTICAL DISKS

G. I. Greisukh, S. A. Stepanov

Abstract:
Design of the structure of diffraction elements with reference to the focusing of semiconductor laser radiation is discussed' For optimal choice of parameters of the synthesized structure, a single diffraction lens is shown to be usable as a high-aperture objective, focusing the radiation of a single- or multiple-mode semiconductor laser into a diffractionally limited spot whose size allows reliable readout from optical disks.

References:

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