Design of Single-Path Optical Pickup Head With Three Wavelengths Using Integrated Optical Unit

Autor:	Hsi-Fu Shih, Wei-Chih Lu, Jenq Yang Chang
Rok vydání:	2009
Předmět:	Physics business.industry Holographic optical element Holography Laser Backward compatibility Electronic Optical and Magnetic Materials law.invention Wavelength Optics Optical path law Path (graph theory) Head (vessel) Optoelectronics Electrical and Electronic Engineering business
Zdroj:	IEEE Transactions on Magnetics. 45:2202-2205
ISSN:	0018-9464
DOI:	10.1109/tmag.2009.2016147
Popis:	For the purpose of backward compatibility to the CD and DVD specifications, the optical pickup head (OPH) design with multiple laser wavelengths and numerical apertures (NAs) is necessary for the Blu-ray Disc (BD) system. By utilizing the features of an integrated optical unit (IOU) and a holographic optical element (HOE), this study presents a novel three-wavelength BD OPH configuration with compactness in a single optical path. There are two OPH designs with the astigmatic and knife-edge focusing detection methods applied to the IOU configurations in this paper, respectively. The simulation results are satisfactory and show the feasibility of the designs.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2f3b35546cf23597bdeecbef3ff007f1 https://doi.org/10.1109/tmag.2009.2016147 Zobrazit plný text záznamu