G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 7/24 (2006.01) B29C 45/00 (2006.01) B29D 17/00 (2006.01) G11B 7/253 (2006.01) G11B 7/26 (2006.01) G11B 23/40 (2006.01)
Patent
CA 2178958
The present invention is relative to an optical information recording medium having a reflective layer for reading out information signals by an optical technique. The optical information recording medium is formed as a plastic substrate. According to the present invention, the substrate is colored by admixture of a dyestuff for enabling instant judgment by the visual sense of the operator as to the contents of the optical information recording medium, for example, as to if the contents of the recording medium is a game program or the music information. If impurities such as dyestuffs are admixed, the optical system of the readout device is usually affected thus raising readout difficulties. Such ill effects on the optical system may be eliminated by setting the particle size of the dyestuff so as to be 50 µm or less.
Le support d'enregistrement d'informations optiques possède une couche de réflexion de signaux d'information à lecture optique. Le support se compose d'un substrat en plastique. Le substrat reçoit une coloration en utilisant un colorant afin que les informations enregistrées sur le support soient confirmées visuellement d'un simple coup d'oeil, et ce quelque soit le type d'information, par exemple, un programme de jeu, des informations musicales ou autre genre d'information. En général, le système optique d'un lecteur est affecté et le lecteur ne peut lire les données facilement lorsqu'une impureté telle que le colorant ou autre se mélange dans le substrat. L'influence d'un tel phénomène sur le système optique est éliminée en réduisant la taille des particules du colorant jusqu'à 50 mu m.
Sawada Kazumi
Shigemori Yoshihiro
Gowling Lafleur Henderson Llp
Sony Disc & Digital Solutions Inc.
Sony Disc Technology Inc.
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