发明名称 |
LASER MARKING DEVICE |
摘要 |
<p>A laser marking device for forming the pattern printed on a liquid crystal mask on the surface of an object. In the laser marking device, an input optical system (20) and an output optical system (30) are positioned on the input surface side of a reflection type liquid crystal element (5) on which the laser beam (L) is made to fall through the input optical system (20). The angle of incidence of the laser beam (L) on the input surface of the element (5) is approximately 90 DEG . The laser beam (L) reflected by the element (5) is directed to the object (15) through the optical system (30). A cooling means (17) which cools the element (5) is provided in contact with the surface of the element (5) opposite to the surface which the laser beam strikes. In such a way, the space for the optical systems (20) and (30) is reduced. The space occupied by the cooling means (17) is reduced and the cooling efficiency and cooling uniformity of the means (17) are improved because the means (17) is in direct contact with the element (5). <IMAGE></p> |
申请公布号 |
EP0842728(A4) |
申请公布日期 |
1999.06.09 |
申请号 |
EP19960905019 |
申请日期 |
1996.03.07 |
申请人 |
KOMATSU LTD. |
发明人 |
MORI, AKIRA;OKUBO, HIDEAKI;SAITO, YOSHINORI;KATO, MISAO |
分类号 |
G02F1/133;B23K26/00;B23K26/06;B23K26/42;H01S3/00;(IPC1-7):B23K26/00 |
主分类号 |
G02F1/133 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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