Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1995-06-07
1998-09-22
Le, N.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
347139, 3461351, 346 742, B41J 2435, G01D 1524, H01S 1131, G11B 700
Patent
active
058121820
ABSTRACT:
An optical information recording medium 10, being a reloadable optical information recording medium, has a first surface on which a pre-group is formed. A lower protective multi-layer film 2 consisting of a total of four film layers, a recording film layer 3, an upper protective film layer 4 and a reflective film layer 5 are successively accumulated on the first surface. On a second surface opposed to the first surface, there is formed an anti-reflective multi-layer film 6 consisting of an anti-reflective film (I) layer 6a and an anti-reflective film (II) layer 6b. Provided with the anti-reflective multi-layer film 6, the optical information recording medium 10 can eliminate reflections of irradiated light on the surface of its substrate. According to such an optical information recording medium, when either of the recorded region and the erased region of the recording film layer has a lower reflectance, the value of that reflectance can be further reduced without reducing the value of a reflectance of the other of the recorded region and the erased region. Accordingly, the amplitude modulation factor of the optical information recording medium can be increased with improvement of the C/N ratio and a reduction of reading errors.
REFERENCES:
patent: 5228024 (1993-07-01), Moon et al.
Gordon Raquel Yvette
Le N.
Nippondenso Co. Ltd.
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