Optical recording medium and method for reproducing record of the same

光記録媒体および該媒体の記録再生方法

Abstract

(57)【要約】 【課題】 特に追記型のDVD−Rにおいて、個体識別 情報(媒体管理情報)を短時間で、信頼性高く形成する ことのできる光記録媒体、およびその記録再生方法を提 供する。 【解決手段】 基板上に、有機色素を主成分として含有 する記録層と、該記録層上に反射層を少なくとも設けて なる光記録媒体であって、上記記録層が(A)薄膜時の 極大吸収波長(λ max )が400〜700nmである色 素の中の1種または2種以上と、(B)薄膜時の極大吸 収波長が750〜850nmである色素の中の1種また は2種以上とを含み、かつ(B)成分の配合量が記録層 中の色素全量に対して1〜10重量%である光記録媒 体、および該光記録媒体を用いた記録再生方法。
PROBLEM TO BE SOLVED: To provide an optical recording medium and a method for reproducing a record which makes it possible to create individual distinguishing information (medium managing information) in a short time and with a high reliability specially as to DVD-R of write once/read many type. SOLUTION: In an optical recording medium, a recording layer containing organic coloring matters as main components is formed on a substrate and a reflecting layer is formed on the recording layer. The recording layer contains (A) one or more of coloring matters with 400-700 nm of maximum absorption wave (λmax) when it has thin films and (B) one or more of coloring matters with 750-850 nm of maximum absorption wave (λmax) when it has thin film, and a blending amount of (B) components is 1-10 wt.% to the total coloring matters in the recording layer. And the invention discloses a method for reproducing a record using the optical recording medium.

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