T. Fujita, M. Kondo, K. Kime, N. Tomikawa, N. Takeshita
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In this paper we report an optical head developed for measuring characteristics of magneto-optical disks. The features of this head are followings:-
(1) Collimating system without anamorphic elements.
(2) Small phase retardation in signal-readout optical system.
(3) Differential readout method using two photodetectors.
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