Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1997-08-28
2000-09-05
Tran, Thang V.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 4414, 369 4423, G11B 700
Patent
active
061153478
ABSTRACT:
An optical pickup device for improving the numerical aperture of an objective lens and for assuring high-reliability recording/reproduction of information signals. The optical pickup device has a first lens 6 having a curvilinear or planar surface facing an optical recording medium 5 and having the numerical aperture set to a pre-set value, and a second lens 3 arranged for clamping the first lens 6 between t and the optical recording medium 5. The optical pickup device also has a light-converging optical system for converging the reflected light from the surface of the optical recording medium 5 and a first movement unit 2 for moving the first objective lens 6 and the second lens 3 along the direction of the optical axis with respect to the second objective lens 3. The optical pickup device also has a second movement unit 11 for moving the first objective lens 6 along the direction of the optical axis relative to the second objective lens 3 and a fixation unit 12 for fixing the first objective lens 6 moved by the second movement unit 9. The method for adjusting the optical processing device includes a step of adjusting the position along the optical axis of the first objective lens 6 and a step of fixing the position of the first lens 6.
REFERENCES:
patent: 5004307 (1991-04-01), Kino et al.
patent: 5125750 (1992-06-01), Corle et al.
patent: 5712842 (1998-01-01), Yamamoto et al.
patent: 5764613 (1998-06-01), Yamamoto et al.
Isao Ichimura, Shinichi Hayashi, and G. S. Kino "High Density Optical Recording Using a Solid Immersion Lens" Nov. 1995.
Fukumoto Atsushi
Ichimura Isao
Maeda Fumisada
Ohsato Kiyoshi
Suzuki Akira
Kananen Ronald P.
Sony Corporation
Tran Thang V.
LandOfFree
Optical pick-up device, optical recording/reproducing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical pick-up device, optical recording/reproducing apparatus , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pick-up device, optical recording/reproducing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2219822