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发明名称
FRESNEL LENS AND ITS MANUFACTURE
摘要
申请公布号
JPH03249602(A)
申请公布日期
1991.11.07
申请号
JP19900045974
申请日期
1990.02.28
申请人
HITACHI LTD
发明人
NISHIGUCHI TAKASHI;AMANO YASUO
分类号
G03B21/62;B29D11/00;G02B3/08
主分类号
G03B21/62
代理机构
代理人
主权项
地址
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