| US 7,542,394 B2 | ||
| Optical information recording device for detecting information during recording and method therefor | ||
| Yoshikazu Sato, Gunma (Japan); Mitsuo Sekiguchi, Gunma (Japan); Hiroya Kakimoto, Gunma (Japan); Fuyuki Miyazawa, Gunma (Japan); and Tetsuharu Kubo, Gunma (Japan) | ||
| Assigned to Taiyo Yuden Co., Ltd., Tokyo (Japan) | ||
| Filed on Sep. 09, 2005, as Appl. No. 11/225,492. | ||
| Application 11/225492 is a continuation of application No. 11/158593, filed on Jun. 22, 2005, abandoned. | ||
| Claims priority of application No. 2004-186496 (JP), filed on Jun. 24, 2004; and application No. 2004-264180 (JP), filed on Sep. 10, 2004. | ||
| Prior Publication US 2006/0077847 A1, Apr. 13, 2006 | ||
| Int. Cl. G11B 27/36 (2006.01) | ||
| U.S. Cl. 369—59.11 [369/59.17] | 1 Claim |
| 1. An optical information recording device that writes information on an optical recording medium by pulse irradiation of
a recording laser beam onto the optical recording medium and that detects the information by irradiating a reproduction laser
beam onto the optical recording medium, wherein the recording laser beam and the reproduction laser beam are branched from
a common laser beam, comprising:
a branching unit for branching the common laser beam into said recording laser beam and said reproduction laser beam;
a pulse generating unit that generates a recording pulse by calculating a logical sum of a first pulse and a second pulse;
an irradiation unit for pulse irradiation of the common laser beam in response to and during the recording pulse, such that
the recording laser beam branched from the common laser beam is also pulse irradiated;
a gate pulse generating unit that generates a gate pulse by calculating a logical multiplication of the second pulse and an
inversion of the first pulse; and
a detecting unit that acquires a reproduction signal, generated be detecting the irradiated reproduction laser beam reflected
from the optical recording medium, in response to and during the gate pulse.
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