Method of adjusting lighting optical device, lighting optical device, exposure system, and exposure method
First Claim
1. An illumination optical apparatus for illuminating a surface to be illuminated, in a desired polarization state on the basis of light from a light source, the illumination optical apparatus comprising:
- first polarization changing means for locally changing a polarization state of light to illuminate the surface to be illuminated; and
second polarization changing means for locally changing a polarization state at a position on or near a pupil plane of the illumination optical apparatus.
1 Assignment
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Accused Products
Abstract
An illumination optical apparatus is arranged to illuminate a surface to be illuminated, with light in a desired polarization state, without substantive influence of manufacturing error of an optical member functioning as a wave plate. The illumination optical apparatus illuminates the surface to be illuminated (M, W) on the basis of light from a light source (1). The illumination optical apparatus is provided with a polarization converting element (12) disposed on or near an illumination pupil plane and adapted for converting a polarization state of incident light into a predetermined polarization state. The polarization converting element has a plurality of variable optical rotating members for variably yielding an angle of rotation to incident linearly polarized light. Each variable optical rotating member has two deviation prisms which are made of an optical material with an optical rotatory power and which are movable relative to each other along a direction intersecting with the optical axis (AX).
271 Citations
53 Claims
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1. An illumination optical apparatus for illuminating a surface to be illuminated, in a desired polarization state on the basis of light from a light source,
the illumination optical apparatus comprising: -
first polarization changing means for locally changing a polarization state of light to illuminate the surface to be illuminated; and
second polarization changing means for locally changing a polarization state at a position on or near a pupil plane of the illumination optical apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 29, 30, 31)
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10. An illumination optical apparatus for illuminating a surface to be illuminated, based on light from a light source,
the illumination optical apparatus comprising a polarization converting element located on or near an illumination pupil plane and adapted for converting a polarization state of incident light into a predetermined polarization state, wherein the polarization converting element locally changes a polarization state of light at a position on or near the pupil plane of the illumination optical apparatus.
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23. An illumination optical apparatus for illuminating a surface to be illuminated, based on light from a light source,
the illumination optical apparatus comprising: -
a polarization converting element located near the surface to be illuminated, at a position optically conjugate with the surface to be illuminated, or near the conjugate position and adapted for converting a polarization state of incident light into a predetermined polarization state, wherein the polarization converting element locally changes a polarization state of illumination light on the surface to be illuminated. - View Dependent Claims (24, 25, 26, 27, 28)
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32. An adjustment method of adjusting an illumination optical apparatus for illuminating a surface to be illuminated, based on light from a light source,
the adjustment method comprising: -
a first step of preparing a variable phase difference member for variably yielding a phase difference between incident light and emerging light;
a second step of setting the phase difference yielded by the variable phase difference member, to a predetermined value; and
a third step of placing the variable phase difference member in an optical path between the light source and the surface to be illuminated. - View Dependent Claims (33, 34, 35, 36, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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37. An adjustment method of adjusting an illumination optical apparatus for illuminating a surface to be illuminated, based on light from a light source,
the adjustment method comprising: -
a first step of locally changing a polarization state of illumination light on the surface to be illuminated; and
a second step of locally changing a polarization state of light at a position on or near a pupil plane of the illumination optical apparatus. - View Dependent Claims (38, 39, 40, 41)
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Specification