Browsing by Author "Lin, Gung-Ding"

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Micro objective lens with NA 0.65 for the blue-light small-form-factor optical pickup head
(2008-08-18)
Shih, Hsi-Fu
;
Lee, Yuan-Chin
;
Chiu, Yi
;
Chao, David Wei-Chung
;
Lin, Gung-Ding
A micro objective lens with the numerical aperture (NA) of 0.65 and clear aperture of 1.1mm was designed, fabricated, and tested for the proposed blue-light small-form-factor optical pickup head system. It adopted the finite optical conjugation and could be produced by using the glass molding technique. The experimental results verify the optical performance near the diffraction-limited focus spot for the applications of high-density portable optical storage systems. (C) 2008 Optical Society of America.
Optical head design using prism-type holographic optical element for small form factor applications
(2008-01-01)
Shih, Hsi-Fu
;
Lee, Yuan-Chin
;
Chiu, Yi
;
Lin, Gung-Ding
;
電控工程研究所
This paper presents an optical head design that minimizes the component number and miniaturizes the head dimension by using a novel reflective prism-type holographic optical element (PT HOE) for the next-generation high-density blue-light system with small form factor (SFF). The PT HOE combines four functions, serving as a folding mirror, a beam-splitter, an aberration correction element, and a servo-signal generation device, which are generally required for a conventional optical pickup head (OPH). It greatly simplifies the system complication and assembly procedure of an OPH. Simulations give the satisfactory results and show the feasibility for realizing a high-density SFF OPH with a simple and compact configuration.