OPTICAL RECORDING MEDIUM

• Main Authors: MATSUDA ISAO, KODAIRA TAKUO, KOSHIRO SHINICHI
• Format: Patent
• Language: English; Japanese
• Published: 19.02.2015
• Subjects: COLOUR PRINTING; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; LINING MACHINES; PERFORMING OPERATIONS; PHYSICS; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; STAMPS; TRANSPORTING; TYPEWRITERS

PROBLEM TO BE SOLVED: To provide an optical recording medium including a recording/reproducing layer having high transmissivity and low reflection rate.SOLUTION: An optical recording medium according to one embodiment of the invention comprises a guide layer 112, one or more recording films 130, a first optical adjustment film 131, a buffer layer 116, and a second optical adjustment film 132. The recording film 130 is composed of an organic pigment material. The first optical adjustment film 131 has a refractive index of 1.5 or more and 2.45 or less and an extinction coefficient of 0 or more and 0.03 or less with respect to light of wavelength 405 nm, and a film thickness of 15 nm or more and 90 nm or less. The second optical adjustment film 132 has a refractive index of 1.4 or more and 2.2 or less and an extinction coefficient of 0 or more and 0.03 or less with respect to the light of wavelength 405 nm, and has a film thickness of 15 nm or more and 55 nm or less. 【課題】透過率が高く反射率が低い記録再生層を有する光記録媒体を提供する。【解決手段】本発明の一実施形態に係る光記録媒体は、ガイド層１１２と、１以上の記録膜１３０と、第１の光学調整膜１３１と、バッファ層１１６と、第２の光学調整膜１３２とを具備する。記録膜１３０は、有機色素材料で構成される。第１の光学調整膜１３１は、波長４０５ｎｍの光に対して、屈折率が１．５以上２．４５以下かつ消衰係数が０以上０．０３以下であり、１５ｎｍ以上９０ｎｍ以下の膜厚を有する。第２の光学調整膜１３２は、波長４０５ｎｍの光に対して、屈折率が１．４以上２．２以下かつ消衰係数が０以上０．０３以下であり、１５ｎｍ以上５５ｎｍ以下の膜厚を有する。【選択図】図５