Title:
LIGHTING OPTICAL SYSTEM, EXPOSURE SYSTEM, AND EXPOSURE METHOD
Document Type and Number:
WIPO Patent Application WO/2007/055120
Kind Code:
A1
Abstract:
A lighting optical system which illuminates a surface to be illuminated with
light in a desired polarizing state by regulating a polarization distribution
on an illumination pupil surface or a surface to be illuminated. A lighting optical
system which illuminates surfaces to be illuminated (M; W) based on light from
a light source (1). A polarization distribution regulating member (14) for regulating
a light polarization distribution on an illumination pupil surface is provided.
The polarization distribution regulating member is disposed so as to be rotatable
around the optical axis (AX) of a lighting optical system, and has an optical rotation
member (9) for imparting to an incident light an optical rotation varying according
to an incident position. The optical rotation member is formed of an optically
rotating optical material, and has its optical-axis-direction thickness changed
along a direction perpendicular to the optical axis.
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Inventors:
TANAKA HIROHISA (JP)
Application Number:
PCT/JP2006/321607
Publication Date:
May 18, 2007
Filing Date:
October 30, 2006
Export Citation:
Assignee:
NIKON CORP (JP)
TANAKA HIROHISA (JP)
TANAKA HIROHISA (JP)
International Classes:
H01L21/027; G02B19/00; G03F7/20
Domestic Patent References:
WO2005050718A1 | 2005-06-02 | |||
WO2004051717A1 | 2004-06-17 |
Foreign References:
JP2005302826A | 2005-10-27 | |||
JP2005108925A | 2005-04-21 | |||
JP2005005521A | 2005-01-06 |
Other References:
See also references of EP 1953805A4
Attorney, Agent or Firm:
YAMAGUCHI, Takao (10 Kanda-tsukasacho 2-chome, Chiyoda-k, Tokyo 48, JP)
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