17 June 1994 Micro-optic element for optical disk memory read-write heads
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Abstract
Based on the theory of computer generated hologram and fabrication of binary optical element, a new micro-optic element for optical disk memory read-write heads is proposed. This element is small in size (5mm in diameter, 1mm in thickness), light in weight (<0.03g), and high in diffraction efficiency (36.64%). It is with three optical functions required for an optical head, splitting beam, producing the focusing error signal and the tracking error signal. When this micro-optic element is used to replace four conventional optical elements (a diffraction grating, a beam splitter prism, a collimating lens and a cylindrical lens) of common optical head, a sophisticated optical head can be produced.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Guoliang Huang, Guoliang Huang, Minxian Wu, Minxian Wu, Guofan Jin, Guofan Jin, Yingbai Yan, Yingbai Yan, } "Micro-optic element for optical disk memory read-write heads", Proc. SPIE 2152, Diffractive and Holographic Optics Technology, (17 June 1994); doi: 10.1117/12.178080; https://doi.org/10.1117/12.178080
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