Optical information recording medium
A technology for recording media and optical information, applied in optical recording media, optical recording systems, recording/reproducing with optical methods, etc., can solve the problems of complex structure, difficult to ensure stable reproduction or recording of information, etc., and achieve the effect of simple structure
Inactive Publication Date: 2010-01-06
SONY CORP
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Problems solved by technology
[0008] However, an optical disc device using the above-mentioned optical disc may require an advanced control system to focus the two light beams on a focal point where information will be recorded due to the vibration of the rotating optical disc.
But this complicates the structure, making it difficult to ensure stable reproduction or recording of information
Method used
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Embodiment Construction
[0030] Embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0031] (1) Structure of optical information recording medium
[0032] (1-1) Overall structure of optical information recording medium
[0033] Such as figure 1 As shown in A to 1C, the optical information recording medium 100 includes a base plate 102 and a base plate 103 . Between the substrates 102 and 103, a recording layer 101 is formed. Therefore, in general, the optical information recording medium 100 functions as a photopolymer medium.
[0034] The substrates 102 and 103 are glass substrates. The substrates 102 and 103 have high light transmittance. The shape of the substrates 102 and 103 is square or rectangular: the lengths dx and dy of the substrates 102 and 103 in the x and y directions are about 50 mm while the thickness t2 and the thickness t3 are between about 0.6 mm˜1.1 mm.
[0035] An antireflective coating (AR) treatment is applied to t...
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Abstract
The present invention provides an optical information recording medium that can stably carry out the recording or reproducing of information with a simple structure. Since the optical information recording medium of this invention contains a photo-polymerization initiator with the evaporation temperature in the range of 140 DEG C-400 DEG C, a recording light beam (L2c) is concentrated to heata portion in the vicinity of the focus (Fb) of the recording light beam (L2c). The heat volatilizes the photo-polymerization initiator, so that it can form bubbles. The bubbles are left as cavities in the recording layer (101) after the irradiation of the recording light beam (L2c) is completed and the area in the vicinity of the focus (Fb) is cooled down. When a reading-out beam (L2d) is irradiated to the bubbles, the difference between the bubble internal refractive index and the recording layer (101) refractive index as the bubble external one reflects the reading-out beam (L2d) and makes it possible to generate a returning beam (L3).
Description
technical field [0001] The present invention relates to an optical information recording medium and a recording method, and preferably, the present invention is applied to, for example, an optical information recording medium on which information is recorded by a light beam and reproduced from the optical information recording medium by a light beam information. Background technique [0002] As optical information recording media, disc-shaped optical discs such as CD (Compact Disc), DVD (Digital Versatile Disc), and Blu-ray disc (hereinafter, registered trademark: referred to as "BD") are popular. [0003] On the other hand, an optical disc device supporting such an optical disc is designed to record various information on the optical disc, such as various contents including music contents and video contents and various data including data for computers. Especially in recent years, the amount of information has increased due to improvements in graphic resolution and sound q...
Claims
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IPC IPC(8): G11B7/244B41M5/26G11B7/004G11B7/24G11B7/24035G11B7/24038
CPCG11B7/244G11B2007/0009G11B7/245G11B7/00452G11B7/004B41M5/26
Inventor 内山浩工藤孝夫林部和弥铃木悠介山津久行田部典宏
Owner SONY CORP