Dynamic magnetic information storage or retrieval – Head – Read only detector using light for reading magnetically...
Patent
1987-04-09
1988-06-28
Wolff, John H.
Dynamic magnetic information storage or retrieval
Head
Read only detector using light for reading magnetically...
G11B 532
Patent
active
047543558
ABSTRACT:
An optical head for a magneto-optical disk, including a diaphragm for cutting at least an outer portion of a bundle of rays, which is provided in the course of an optical system of a signal detecting portion.
REFERENCES:
patent: RE26952 (1970-09-01), Baaba et al.
patent: 3480933 (1969-11-01), Treves
patent: 3739362 (1973-06-01), Eschelbach
Deguchi Toshihisa
Mieda Michinobu
Murakami Yoshiteru
Ohta Kenji
Takahashi Akira
Sharp Kabushiki Kaisha
Wolff John H.
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