Results 1 to 10 of about 3,105,384 (252)

An increased capacity DataPlay optical disc and drive

SPIE Proceedings, 2004
Based on new market opportunities for consumer electronics devices DataPlay has designed a new version small form-factor optical disc and drive featuring a capacity of 750MB per disc as compared to 500MB per disc of the original product. The NA of the optical pickup has been increased from 0.60 to 0.72.
David L. Blankenbeckler, Bernard W. Bell, Jr., David H. Davies, Lane W. Lee   +3 more
exaly   +2 more sources

Development of integrated optical pickup for small form factor optical disc drive

SPIE Proceedings, 2006
To generate the small sized optical pickup for high recording capacity, integrated optical pickup (IOP) corresponding to blu-ray disc specifications has been developed. The development of the IOP includes the design, fabrication, and evaluation of objective lens unit, silicon optical bench design and fabrication, and the evaluation process of focus ...
null Jin-Seung Sohn, null Eun-Hyoung Cho, null MyungBok Lee, null Hae-Sung Kim, null Sung-Dong Suh, null Sung-Mook Kang, null No-Cheol Park, null Young-pil Park   +7 more
exaly   +2 more sources

Miniaturized Optical Pickup and Mechanism for Mobile Optical Disc Drive

Japanese Journal of Applied Physics, 2004
Recently, the market for portable instruments has been increasing markedly. If a very small optical disc drive can be realized, it is expected that a new market for memories will be created, because the running cost of an optical disc is very low. The main issues in such realization are miniaturization of a loading mechanism with a disc cartridge ...
Mitsuhiro Togashi, Takayuki Sasaoka, Ho-Cheol Lee, Ho-Seop Jeong   +3 more
exaly   +2 more sources

Performance of automatic ball balancers on optical disc drives

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2002
The balancing performance of an automatic ball balancer fitted on the spindle motor of optical disc drives, for instance CD-ROM or DVD drives, is analysed. It is well known that the operating speed of an optical disc drive with an automatic ball balancer should be higher than the translational natural frequency of the system to be balanced.
W Kim, J Chung
exaly   +2 more sources

Disc defect classification for optical disc drives

IEEE Transactions on Consumer Electronics, 2005
Optical disc drives are subject to various disturbances and faults. A special type of fault is the so-called disc defect. In this paper we present an approach for disc defect classification. It is based on hierarchical clustering of measured signals that are affected by disc defects. The timeseriesare mapped into a feature space after which the feature
Jan van Helvoirt, George A. L. Leenknegt, Maarten Steinbuch, Henk J. Goosens   +3 more
openaire   +3 more sources

Heat Analysis of an Optical Disc Drive with Natural Cooling

The Proceedings of the Conference on Information Intelligence and Precision Equipment IIP, 2002
Manabu OCHI, Shigeo OHASHI, Masato NAKANISHI, Kohei TAKITA   +3 more
exaly   +2 more sources

Digital Servo IC for Optical Disc Drives

IFAC Proceedings Volumes, 2000
Abstract This paper addresses the use of PID regulators to achieve some of the main control goals in an optical disc drive: (i) focusing of the laser spot on the disc surface, (ii) tracking the continuous data spiral during playback, and (iii) radially searching the target location on disc during an access procedure.
Ton H Akkermans, Sorin G Stan
openaire   +1 more source

Optical Disc Drives: A Study of Variation

Nonlinear Optics, 2011
Optical disc drives vary significantly in their performance. Here we report a principal components analysis performed on data from new drives, which separates out the better performing drives and finds correlations among drive test variables.
Guilin Jiang, Barry M. Lunt, Travis Niederhauser, Matthew Linford   +3 more
openaire   +1 more source