6 May 1989 Computer Generated Holographic Optical Elements For Optical Disk Memory Read Write Heads
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A new concept optical head, using a holographic optical element has been developed. This holographic element combines three optical functions, beam splitter, focusing error detection and tracking error detection optics functions. A polarizing beam splitter function is also combined for magneto-optical disk head use. These holographic optical elements are computer generated holograms fabricated using electron beam lithography technique. A new optical configuration has been designed for this optical head to remove the influence of wavelength variation in the laser diode used for a light source. The off-set signal in tracking error signal has been reduced by introduction of the holograms which are used only for detecting tacking error. The stable operation and high read out S/N ratio have been obtained by applying this holographic optical element.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yuzo Ono, Yuzo Ono, Yasuo Kimura, Yasuo Kimura, Nobuo Nishida, Nobuo Nishida, } "Computer Generated Holographic Optical Elements For Optical Disk Memory Read Write Heads", Proc. SPIE 1052, Holographic Optics: Optically and Computer Generated, (6 May 1989); doi: 10.1117/12.951499; https://doi.org/10.1117/12.951499


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