Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1993-12-09
1995-05-23
Psitos, Aristotelis
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 4425, G11B 700
Patent
active
054187664
ABSTRACT:
An optical disk apparatus which can exactly determine whether or not an optical disk is loaded therein in a short time. The optical disk apparatus determines the presence of the optical disk having a transparent film provided on a recording surface by means of a focusing performed by an optical pick-up. The optical pick-up receives a reflected light beam reflected by the optical disk and splits the received light beam into at least two light beams so as to output signals corresponding to each of the split light beams. A controlling unit controls a movement of the optical pick-up in a direction perpendicular to the recording surface of the optical disk. A signal generating unit generates a focus error signal when signals corresponding to the reflected light beam are supplied by the optical pick-up. A determining unit determines whether or not the optical disk is loaded in the optical disk apparatus by counting the number of the focus error signals. The determination is carried out while the optical pick-up travels in a single direction.
REFERENCES:
patent: 5003521 (1991-03-01), Yoshida et al.
patent: 5187696 (1993-02-01), Ishii et al.
Fujisawa Shin-ichi
Hosono Yasushi
Otsuka Yoshiyuki
Meller Michael N.
Psitos Aristotelis
Teac Corporation
Tran Thang V.
LandOfFree
Apparatus for detecting the presence of an optical disk does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for detecting the presence of an optical disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for detecting the presence of an optical disk will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2145564