发明名称 |
LIGHTING OPTICAL SYSTEM, EXPOSURE APPARATUS, AND DEVICE MANUFACTURING METHOD |
摘要 |
<P>PROBLEM TO BE SOLVED: To suppress the generation of irregularity in an illuminance on an irradiating face, and a change of a polarizing state caused by influences of a stress double refraction inside a lens. <P>SOLUTION: The lighting optical system which lights the irradiating face by a light from a light source includes: first fresnel lens faces (11a and 11b) and second fresnel lens faces (12a and 12b) arranged in an optical path. The lighting optical system is configured in such a way that a position of a step of the first fresnel lens faces is not overlapped with a position of a step of the second fresnel lens faces when viewing from an optical axis (AX) direction of the lighting optical system. <P>COPYRIGHT: (C)2010,JPO&INPIT |
申请公布号 |
JP2010062309(A) |
申请公布日期 |
2010.03.18 |
申请号 |
JP20080226089 |
申请日期 |
2008.09.03 |
申请人 |
NIKON CORP |
发明人 |
MURAMATSU KOJI |
分类号 |
H01L21/027;G02B19/00;G03F7/20 |
主分类号 |
H01L21/027 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|